Alton, Illinois Weather Conditions

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Current Conditions

  • 34°
  • Partly Cloudy
  • Wind: East 7 mph
  • Humidity: 48%
  • Visibility: 10.0 miles
  • Dew Point: 16°
  • Pressure: 30.53 in. -
  • Heat Index: 28

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Click a section below for more information.

Next 12 Hours

12  pm
3  pm
6  pm
9  pm
12  am
Overcast
Overcast
Partly Cloudy
Partly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Ice Pellets
Ice Pellets
30°
30°
36°
27°
30°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Mostly Cloudy
  • High: 36 °
  • Low: 27 °
  • Mostly Cloudy
  • Tuesday
  • Chance of Rain
  • High: 48 °
  • Low: 18 °
  • Chance of Rain
  • Wednesday
  • Chance of Snow
  • High: 32 °
  • Low: 10 °
  • Chance of Snow
  • Thursday
  • Clear
  • High: 25 °
  • Low: 18 °
  • Clear
  • Friday
  • Clear
  • High: 45 °
  • Low: 21 °
  • Clear

Forecast for Alton, Illinois

Updated: 9:00 AM CST on March 02, 2015

  • Monday

    Partly cloudy in the morning, then overcast. High of 36F. Winds from the North at 5 to 10 mph shifting to the South in the afternoon.

  • Monday Night

    Mostly cloudy in the evening, then overcast with ice pellets. Low of 27F with a windchill as low as 19F. Winds from the ESE at 5 to 10 mph. Chance of precipitation 60% .

  • Tuesday

    Overcast with rain showers. High of 48F. Winds from the South at 10 to 15 mph. Chance of rain 70%.

  • Tuesday Night

    Overcast with a chance of snow in the evening, then mostly cloudy. Fog overnight. Low of 18F. Breezy. Winds from the WNW at 10 to 20 mph. Chance of snow 40%.

  • Wednesday

    Overcast with a chance of snow in the morning, then mostly cloudy with a chance of snow. High of 32F with a windchill as low as 7F. Breezy. Winds from the NNW at 15 to 20 mph. Chance of snow 30%.

  • Wednesday Night

    Partly cloudy. Low of 10F. Winds from the NNW at 10 to 15 mph.

  • Thursday

    Clear. High of 25F with a windchill as low as -2F. Winds from the NW at 10 to 15 mph.

  • Thursday Night

    Partly cloudy in the evening, then clear. Low of 18F. Winds from the ENE at 5 to 10 mph shifting to the SSE after midnight.

  • Friday

    Clear. High of 45F. Breezy. Winds from the South at 15 to 20 mph.

  • Friday Night

    Clear. Low of 21F with a windchill as low as 10F. Winds from the SSW at 10 to 15 mph.

  • Saturday

    Clear. High of 50F. Winds from the SW at 10 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 27F. Winds from the WSW at 5 to 10 mph shifting to the NNW after midnight.

  • Sunday

    Clear. High of 46F. Winds from the NW at 10 to 15 mph.

  • Sunday Night

    Clear. Low of 32F with a windchill as low as 25F. Winds from the WSW at 5 to 20 mph.

  • Monday

    Clear. High of 48F. Breezy. Winds from the NW at 15 to 20 mph.

  • Monday Night

    Clear. Low of 30F. Winds from the West at 5 to 15 mph shifting to the SSW after midnight.

  • Tuesday

    Clear. High of 46F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 27F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 50F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Low of 32F. Winds from the ESE at 5 to 10 mph.

  • Thursday

    Clear. High of 50F. Winds from the ESE at 5 to 10 mph.

  • Thursday Night

    Clear. Fog overnight. Low of 32F. Winds from the SE at 5 to 10 mph.

Severe Weather Alert Descriptions

 Local Storm Report 



03/01/2015 0951 am

Edwardsville, Madison County.

Snow m5.0 inch, reported by trained spotter.





03/01/2015 1015 am

1 miles se of East Alton, Madison County.

Snow m6.0 inch, reported by amateur radio.





03/01/2015 1130 am

3 miles E of Highland, Madison County.

Snow m6.8 inch, reported by trained spotter.





03/01/2015 1240 PM

Granite City, Madison County.

Snow m4.5 inch, reported by trained spotter.





03/01/2015 0259 PM

3 miles S of Highland, Madison County.

Snow m5.5 inch, reported by trained spotter.





03/01/2015 0951 am

Edwardsville, Madison County.

Snow m5.0 inch, reported by trained spotter.





03/01/2015 1015 am

1 miles se of East Alton, Madison County.

Snow m6.0 inch, reported by amateur radio.





03/01/2015 1130 am

3 miles E of Highland, Madison County.

Snow m6.8 inch, reported by trained spotter.





03/01/2015 1240 PM

Granite City, Madison County.

Snow m4.5 inch, reported by trained spotter.





03/01/2015 0259 PM

3 miles S of Highland, Madison County.

Snow m5.5 inch, reported by trained spotter.





03/01/2015 0951 am

Edwardsville, Madison County.

Snow m5.0 inch, reported by trained spotter.





03/01/2015 1015 am

1 miles se of East Alton, Madison County.

Snow m6.0 inch, reported by amateur radio.





03/01/2015 1130 am

3 miles E of Highland, Madison County.

Snow m6.8 inch, reported by trained spotter.





03/01/2015 1240 PM

Granite City, Madison County.

Snow m4.5 inch, reported by trained spotter.





03/01/2015 0259 PM

3 miles S of Highland, Madison County.

Snow m5.5 inch, reported by trained spotter.





03/01/2015 0259 PM

3 miles S of Highland, Madison County.

Snow m5.5 inch, reported by trained spotter.






03/01/2015 0259 PM

3 miles S of Highland, Madison County.

Snow m5.5 inch, reported by trained spotter.






03/01/2015 1240 PM

Granite City, Madison County.

Snow m4.5 inch, reported by trained spotter.






03/01/2015 1240 PM

Granite City, Madison County.

Snow m4.5 inch, reported by trained spotter.






03/01/2015 1240 PM

Granite City, Madison County.

Snow m4.5 inch, reported by trained spotter.






03/01/2015 1130 am

3 miles E of Highland, Madison County.

Snow m6.8 inch, reported by trained spotter.






03/01/2015 1130 am

3 miles E of Highland, Madison County.

Snow m6.8 inch, reported by trained spotter.






03/01/2015 1015 am

1 miles se of East Alton, Madison County.

Snow m6.0 inch, reported by amateur radio.






03/01/2015 1015 am

1 miles se of East Alton, Madison County.

Snow m6.0 inch, reported by amateur radio.






03/01/2015 0951 am

Edwardsville, Madison County.

Snow m5.0 inch, reported by trained spotter.






03/01/2015 0951 am

Edwardsville, Madison County.

Snow m5.0 inch, reported by trained spotter.






03/01/2015 0705 am

St. Jacob, Madison County.

Snow m6.0 inch, reported by trained spotter.






03/01/2015 0705 am

St. Jacob, Madison County.

Snow m6.0 inch, reported by trained spotter.






03/01/2015 0716 am

Godfrey, Madison County.

Snow m5.3 inch, reported by trained spotter.






03/01/2015 0716 am

Godfrey, Madison County.

Snow m5.3 inch, reported by trained spotter.






03/01/2015 0713 am

Wood River, Madison County.

Snow m6.0 inch, reported by trained spotter.






03/01/2015 0713 am

Wood River, Madison County.

Snow m6.0 inch, reported by trained spotter.






03/01/2015 0709 am

St. Jacob, Madison County.

Snow m5.0 inch, reported by trained spotter.






03/01/2015 0709 am

St. Jacob, Madison County.

Snow m5.0 inch, reported by trained spotter.






03/01/2015 0705 am

St. Jacob, Madison County.

Snow m5.5 inch, reported by trained spotter.






03/01/2015 0705 am

St. Jacob, Madison County.

Snow m5.5 inch, reported by trained spotter.






03/01/2015 1203 am

St. Jacob, Madison County.

Snow m4.8 inch, reported by trained spotter.


            Still snowing





03/01/2015 1203 am

St. Jacob, Madison County.

Snow m4.8 inch, reported by trained spotter.


            Still snowing





02/28/2015 1020 PM

St. Jacob, Madison County.

Snow m4.0 inch, reported by trained spotter.






02/28/2015 1020 PM

St. Jacob, Madison County.

Snow m4.0 inch, reported by trained spotter.






02/28/2015 0835 PM

Wood River, Madison County.

Snow e4.0 inch, reported by public.






02/28/2015 0835 PM

Wood River, Madison County.

Snow e4.0 inch, reported by public.






02/28/2015 0835 PM

Wood River, Madison County.

Snow e4.0 inch, reported by public.






02/28/2015 0605 PM

Wood River, Madison County.

Snow e2.0 inch, reported by public.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e1.5 inch, reported by trained spotter.






02/28/2015 0605 PM

Wood River, Madison County.

Snow e2.0 inch, reported by public.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e1.5 inch, reported by trained spotter.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e2.5 inch, reported by trained spotter.






02/28/2015 0507 PM

Godfrey, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0430 PM

Granite City, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e1.5 inch, reported by trained spotter.






02/28/2015 0507 PM

Godfrey, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0605 PM

Wood River, Madison County.

Snow e2.0 inch, reported by public.






02/28/2015 0605 PM

Wood River, Madison County.

Snow e2.0 inch, reported by public.






02/28/2015 0430 PM

Granite City, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e1.5 inch, reported by trained spotter.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e1.5 inch, reported by trained spotter.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e2.5 inch, reported by trained spotter.






02/28/2015 0621 PM

3 miles SW of Edwardsville, Madison County.

Snow e2.5 inch, reported by trained spotter.






02/28/2015 0507 PM

Godfrey, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0507 PM

Godfrey, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0430 PM

Granite City, Madison County.

Snow m1.0 inch, reported by trained spotter.






02/28/2015 0430 PM

Granite City, Madison County.

Snow m1.0 inch, reported by trained spotter.





Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: MesoWest ALTON IL US UPR, Alton, IL

Updated: 11:30 AM CST

Temperature: 41 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Alton, IL

Updated: 12:56 PM CST

Temperature: 39.4 °F Dew Point: 16 °F Humidity: 38% Wind: East at 5.4 mph Pressure: 30.47 in Hourly Precipitation: 0.02 in Windchill: 35 °F Graphs

Location: Alton - Beacon, Alton, IL

Updated: 12:56 PM CST

Temperature: 36.3 °F Dew Point: 23 °F Humidity: 58% Wind: East at 2.9 mph Pressure: 30.51 in Hourly Precipitation: 0.03 in Windchill: 36 °F Graphs

Location: Alton - Christian Hill Area, Alton, IL

Updated: 12:55 PM CST

Temperature: 35.8 °F Dew Point: 20 °F Humidity: 51% Wind: WSW at 1.0 mph Pressure: 30.50 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Alton - Rock Gate Estates, Alton, IL

Updated: 12:56 PM CST

Temperature: 34.5 °F Dew Point: 24 °F Humidity: 66% Wind: Calm Pressure: 30.49 in Hourly Precipitation: 0.06 in Windchill: 34 °F Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 12:52 PM CST

Temperature: 34.9 °F Dew Point: 23 °F Humidity: 61% Wind: NNE at 1.0 mph Pressure: 30.49 in Hourly Precipitation: 0.01 in Windchill: 35 °F Graphs

Location: Brecht Ln, Godfrey, IL

Updated: 12:54 PM CST

Temperature: 37.9 °F Dew Point: 18 °F Humidity: 44% Wind: NE at 2.7 mph Pressure: 30.37 in Hourly Precipitation: - Windchill: 38 °F Graphs

Location: WEST ALTON, West Alton, MO

Updated: 12:50 PM CST

Temperature: 38.7 °F Dew Point: - Humidity: 55% Wind: North at - Pressure: - Hourly Precipitation: - Windchill: 39 °F Graphs

Location: Godfrey River Aire Subdivision, Godfrey, IL

Updated: 12:56 PM CST

Temperature: 34.8 °F Dew Point: 21 °F Humidity: 56% Wind: SE at 1.0 mph Pressure: 30.49 in Hourly Precipitation: 0.05 in Windchill: 35 °F Graphs

Location: Wood River (West End), Wood River, IL

Updated: 12:56 PM CST

Temperature: 41.5 °F Dew Point: 21 °F Humidity: 44% Wind: SSW at 2.7 mph Pressure: 30.18 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: APRSWXNET East Alton IL US, Wood River, IL

Updated: 12:10 PM CST

Temperature: 34 °F Dew Point: 17 °F Humidity: 50% Wind: NE at 1 mph Pressure: 30.32 in Hourly Precipitation: 0.05 in Windchill: 34 °F Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 12:56 PM CST

Temperature: 33.5 °F Dew Point: 17 °F Humidity: 50% Wind: ENE at 1.0 mph Pressure: 30.50 in Hourly Precipitation: 0.04 in Windchill: 34 °F Graphs

Location: Whispering Oaks Drive, Bethalto, IL

Updated: 11:40 AM CST

Temperature: 39.6 °F Dew Point: 29 °F Humidity: 66% Wind: North at - Pressure: 30.65 in Hourly Precipitation: - Windchill: 40 °F Graphs

Location: Jersey County along IL 111, Brighton, IL

Updated: 12:56 PM CST

Temperature: 40.8 °F Dew Point: 26 °F Humidity: 55% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.02 in Windchill: 41 °F Graphs

Location: Bethalto, IL

Updated: 12:56 PM CST

Temperature: 35.2 °F Dew Point: -16 °F Humidity: 10% Wind: NNE at 2.2 mph Pressure: 27.59 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Riverside at Albers Pointe, Florissant, MO

Updated: 12:44 PM CST

Temperature: 35.6 °F Dew Point: 19 °F Humidity: 53% Wind: North at - Pressure: 30.47 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Alber Pointe Drive, Florissant, MO

Updated: 11:40 AM CST

Temperature: 35.4 °F Dew Point: 20 °F Humidity: 52% Wind: North at - Pressure: 30.51 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Jost Farm, Florissant, MO

Updated: 12:55 PM CST

Temperature: 39.6 °F Dew Point: 20 °F Humidity: 44% Wind: NE at 4.5 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: MesoWest NAMOK2 IL US UPR, Granite City, IL

Updated: 11:10 AM CST

Temperature: 36 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: MesoWest NAMOK1 IL US UPR, Granite City, IL

Updated: 11:50 AM CST

Temperature: 37 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 12:56 PM CST

Temperature: 35.4 °F Dew Point: 20 °F Humidity: 53% Wind: SE at 4.0 mph Pressure: 30.55 in Hourly Precipitation: 0.05 in Windchill: 32 °F Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 12:55 PM CST

Temperature: 33.7 °F Dew Point: 22 °F Humidity: 61% Wind: ESE at 1.0 mph Pressure: 30.52 in Hourly Precipitation: 0.03 in Windchill: 34 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 12:47 PM CST

Temperature: 41.4 °F Dew Point: 23 °F Humidity: 48% Wind: East at 3.7 mph Pressure: 30.48 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 12:46 PM CST

Temperature: 34.9 °F Dew Point: 22 °F Humidity: 60% Wind: ENE at 1.0 mph Pressure: 30.53 in Hourly Precipitation: 0.04 in Windchill: 35 °F Graphs

Location: MesoWest SHPMAN IL US UPR, Shipman, IL

Updated: 11:00 AM CST

Temperature: 32 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Kelly Greens Weather Station, Edwardsville, IL

Updated: 12:56 PM CST

Temperature: 33.5 °F Dew Point: 23 °F Humidity: 66% Wind: NE at 1.0 mph Pressure: 30.53 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: MesoWest GARD IL US UPR, Hamel, IL

Updated: 11:45 AM CST

Temperature: 29 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Birmingham Drive, Glen Carbon, IL

Updated: 11:35 AM CST

Temperature: 40.6 °F Dew Point: 32 °F Humidity: 70% Wind: North at - Pressure: 30.58 in Hourly Precipitation: - Windchill: 41 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated aviation 
National Weather Service St Louis MO 
1219 PM CST Mon Mar 2 2015 


Short term: (through late this afternoon) 
issued at 345 am CST Mon Mar 2 2015 


Strong ridge of high pressure will move across Missouri into eastern 
Illinois and western Indiana today. Early morning fog should 
dissipate within an hour or two of sunrise, and then we'll see 
increasing high clouds into the afternoon. With wind turning to the 
east and then southeast this afternoon and decent insolation, expect 
temperatures to rise above freezing across most if not all of the 
area. 


Carney 


Long term: (tonight through sunday) 
issued at 345 am CST Mon Mar 2 2015 


(monday night) 


Precipitation is expected to develop tonight in response to backing 
flow aloft and increasing warm air advection. The timing continues to look much 
more favorable for after midnight for most locations, with the best 
location for precipitation this evening being further west over 
central and northeast MO. While the strength of the warm air aloft 
will be enough to result in liquid pcpn for much of the event 
tonight, the northern fringes--especially northeast MO and 
west-central Illinois--will likely also receive some sleet as well during 
the first few hours. The predominance of liquid pcpn will also make 
surface temps a critical element in separating freezing rain from 
rain. The latest indications are that surface temps will be below 
freezing for much of the County Warning Area this evening, but with increasing 
southeasterly winds and thickening cloud cover, temps are expected 
to rise above freezing by sunrise Tuesday morning. Freezing rain 
should therefore be limited to a few hours or less for many areas, 
resulting in a light glaze overnight, and be most persistent for 
west-central IL, where ice accums may approach a tenth of an inch. 
A winter wx advisory was considered, but with the critical element 
of surface temp and lesser impact of overnight occurrence, will let 
the day shift take one final look with hopefully better surface temp 
confidence before determining the need for any headlines. 


(Tuesday) 


Thick cloud cover is expected to persist but thanks to southerly 
surface winds and rising temps from the previous night, temps should 
still rise into the 40s for areas north of I-70 and should get into 
the 50s for areas south of I-70. This represents a bit cooler 
forecast than thought earlier. With this also looks like a bit less 
of a thunder threat as well. Have trimmed thunder to isolated in 
coverage and pushed it south to just southern MO and far southern 
Illinois. A strong cold front will already be pushing into northeast MO 
from the northwest by Sundown. Warm air advection pcpn from the previous night 
will continue for much of this day, gradually edging east but should 
be all non-freezing liquid. The much drier and colder air moving in 
behind the cold front may briefly change any rain over to snow but 
pcpn by this time should also be spotty and result in little-no snow 
accums. 


(Wednesday) 


The models are coming into better consensus on handling another pcpn 
event for this day. Strong frontogenesis settling across the 
southern half of MO and southern third of Illinois will couple with a 
backbuilding h300 jet that will become cyclonically curved with time 
to produce a decent shot of pcpn--especially for southeast MO and 
far southern Illinois. Enough cold air will be in place by this time to 
maintain pcpn-types as all snow. However, we continue to see a more 
northward solution with the NAM, but the others are gradually 
trending more northerly. As far as amounts are concerned, there is 
potential for a heavy snow event for parts of southeast MO given the 
intense and deep lift that will occur here for several hours with a 
sharp northern gradient also given the very dry air to the north. 
Current snowfall amounts look to be just below 6" for a storm total 
in parts of southeast MO and so will continue to monitor this 
closely for the need to issue any winter headlines for this event. 
Snowfall amounts further to the north towards stl Metro are purely 
arbitrary at this point with the anticipated sharp northern cutoff. 


(Thursday - sunday) 


The main trough axis aloft swings thru and shifts the flow from the northwest 
for the remainder of this period. A quiet, dry period should 
dominate much of this with moderating temps with southerly flow 
expected for next weekend. A shortwave trough may deliver some pcpn 
for next weekend but low confidence to say the least so left dry for 
now. 


Tes 
&& 


Aviation: (for the 18z tafs through 18z Tuesday afternoon) 
issued at 1212 PM CST Mon Mar 2 2015 


Mid and high clouds to prevail today with winds from the east. 
Next weather system to approach region tonight with cigs gradually 
lowering. With onset of precipitation will see cigs lower to IFR. 
Precip to start off as light freezing rain then transition to rain 
between 11z-13z Tuesday as warmer air continues to advect north 
into region as winds veer and pickup from the south. 


Specifics for kstl: 
mid and high clouds to prevail today with winds from the east. 
Next weather system to approach region tonight with cigs gradually 
lowering. With onset of precipitation around 07z Tuesday will see cigs 
lower to IFR. Precip to start off as light freezing rain then 
transition to rain around 11z Tuesday as warmer air continues to 
advect north into region as winds veer and pickup from the south. 
Cold front to move through Metro area around 22z Tuesday as winds 
veer to the west. Not sure on coverage of precipitation with 
frontal boundary, so just added vcnty shower mention after 22z Tuesday. 


Byrd 
&& 


Lsx watches/warnings/advisories: 
MO...none. 
Illinois...none. 
&& 


$$ 
Weather forecast office lsx 



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