Alton, Illinois Weather Conditions

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Current Conditions

  • 59°
  • Clear
  • Wind: NNE 8 mph
  • Humidity: 39%
  • Visibility: 10.0 miles
  • Dew Point: 34°
  • Pressure: 29.95 in. -

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Next 12 Hours

3  pm
6  pm
9  pm
12  am
3  am
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
61°
61°
51°
45°
41°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Clear
  • High: 61 °
  • Low: 38 °
  • Clear
  • Monday
  • Partly Cloudy
  • High: 65 °
  • Low: 41 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 66 °
  • Low: 46 °
  • Partly Cloudy
  • Wednesday
  • Overcast
  • High: 68 °
  • Low: 46 °
  • Overcast
  • Thursday
  • Clear
  • High: 70 °
  • Low: 46 °
  • Clear

Forecast for Alton, Illinois

Updated: 1:20 PM CDT on January 26, 2015

  • Sunday

    Abundant sunshine. High 61F. Winds NNE at 10 to 20 mph.

  • Sunday Night

    Clear to partly cloudy. Low 38F. Winds NNE at 5 to 10 mph.

  • Monday

    Partly cloudy skies. High around 65F. Winds NNE at 10 to 15 mph.

  • Monday Night

    Partly cloudy skies. Low 41F. Winds NE at 5 to 10 mph.

  • Tuesday

    Partly to mostly cloudy. High 66F. Winds NNE at 10 to 15 mph.

  • Tuesday Night

    Mostly cloudy. Low 46F. Winds NNE at 5 to 10 mph.

  • Wednesday

    Overcast. High 68F. Winds N at 10 to 15 mph.

  • Wednesday Night

    Some clouds early will give way to generally clear conditions overnight. Low 46F. Winds N at 5 to 10 mph.

  • Thursday

    Generally sunny despite a few afternoon clouds. High near 70F. Winds N at 10 to 15 mph.

  • Thursday Night

    Clear skies. Low 46F. Winds NE at 5 to 10 mph.

  • Friday

    Mainly sunny. High 74F. Winds light and variable.

  • Friday Night

    Clear to partly cloudy. Low 52F. Winds light and variable.

  • Saturday

    Generally sunny despite a few afternoon clouds. High 78F. Winds SW at 5 to 10 mph.

  • Saturday Night

    Partly cloudy skies. Low 57F. Winds light and variable.

  • Sunday

    Intervals of clouds and sunshine. High 79F. Winds SSW at 10 to 15 mph.

  • Sunday Night

    Partly cloudy skies. Low 59F. Winds S at 10 to 15 mph.

  • Monday

    Generally sunny despite a few afternoon clouds. High 84F. Winds S at 10 to 20 mph.

  • Monday Night

    Partly cloudy skies early giving way to a few showers after midnight. Low 61F. Winds S at 10 to 15 mph. Chance of rain 30%.

  • Tuesday

    A few showers in the morning with scattered thunderstorms arriving in the afternoon. High 78F. Winds S at 10 to 15 mph. Chance of rain 50%.

  • Tuesday Night

    Considerable cloudiness with occasional rain showers. Low near 60F. Winds SE at 5 to 10 mph. Chance of rain 50%.

  • Wednesday

    Rain showers in the morning with scattered thunderstorms arriving in the afternoon. High 77F. Winds SSE at 10 to 15 mph. Chance of rain 50%.

  • Wednesday Night

    Variably cloudy with scattered thunderstorms. Low near 60F. Winds SSE at 5 to 10 mph. Chance of rain 50%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Alton, IL

Updated: 3:50 PM CDT

Temperature: 67.3 °F Dew Point: 36 °F Humidity: 31% Wind: NW at 7.6 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Graphs

Location: Alton - Christian Hill Area, Alton, IL

Updated: 3:50 PM CDT

Temperature: 63.0 °F Dew Point: 36 °F Humidity: 36% Wind: ESE at 2.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Alton, IL

Updated: 3:25 PM CDT

Temperature: 63 °F Dew Point: 35 °F Humidity: 35% Wind: North at 14 mph Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Alton - Rock Gate Estates, Alton, IL

Updated: 3:50 PM CDT

Temperature: 61.9 °F Dew Point: 40 °F Humidity: 44% Wind: East at 4.5 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 3:50 PM CDT

Temperature: 62.6 °F Dew Point: 39 °F Humidity: 42% Wind: North at 4.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Graphs

Location: Brecht Ln, Godfrey, IL

Updated: 3:39 PM CDT

Temperature: 64.0 °F Dew Point: 38 °F Humidity: 39% Wind: Calm Pressure: 29.79 in Hourly Precipitation: - Graphs

Location: WEST ALTON, West Alton, MO

Updated: 3:50 PM CDT

Temperature: 63.7 °F Dew Point: - Humidity: 40% Wind: North at - Pressure: - Hourly Precipitation: - Graphs

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

Updated: 3:40 PM CDT

Temperature: 64.9 °F Dew Point: 41 °F Humidity: 41% Wind: Calm Pressure: 29.59 in Hourly Precipitation: - Graphs

Location: APRSWXNET, Wood River, IL

Updated: 3:23 PM CDT

Temperature: 63 °F Dew Point: 37 °F Humidity: 38% Wind: NW at 2 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 3:53 PM CDT

Temperature: 62.6 °F Dew Point: 36 °F Humidity: 37% Wind: North at 1.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Graphs

Location: Whispering Oaks Drive, Bethalto, IL

Updated: 3:52 PM CDT

Temperature: 63.7 °F Dew Point: 46 °F Humidity: 52% Wind: North at - Pressure: 30.04 in Hourly Precipitation: - Graphs

Location: Foster Township, Alton, IL

Updated: 3:39 PM CDT

Temperature: 61.9 °F Dew Point: 39 °F Humidity: 43% Wind: NNE at 14.0 mph Pressure: 29.89 in Hourly Precipitation: - Graphs

Location: Jersey County along IL 111, Brighton, IL

Updated: 3:53 PM CDT

Temperature: 65.5 °F Dew Point: 41 °F Humidity: 41% Wind: Calm Pressure: 29.60 in Hourly Precipitation: 0.00 in Graphs

Location: Timber Ridge, Godfrey, IL

Updated: 3:50 PM CDT

Temperature: 61.9 °F Dew Point: 42 °F Humidity: 48% Wind: North at 3.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Graphs

Location: Bethalto, IL

Updated: 3:53 PM CDT

Temperature: 62.2 °F Dew Point: 5 °F Humidity: 10% Wind: NW at 3.1 mph Pressure: 29.44 in Hourly Precipitation: 0.06 in Graphs

Location: Jost Farm, Florissant, MO

Updated: 3:50 PM CDT

Temperature: 68.4 °F Dew Point: 39 °F Humidity: 34% Wind: East at 5.4 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Granite City, IL

Updated: 12:50 PM CDT

Temperature: 59 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Granite City, IL

Updated: 1:30 PM CDT

Temperature: 66 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Grand Ave, Edwardsville, IL

Updated: 3:53 PM CDT

Temperature: 67.3 °F Dew Point: 39 °F Humidity: 36% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Graphs

Location: Riverwood Place, Florissant, MO

Updated: 3:53 PM CDT

Temperature: 61.9 °F Dew Point: 41 °F Humidity: 46% Wind: ESE at 1.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Graphs

Location: 27th Street, Granite City, IL

Updated: 3:52 PM CDT

Temperature: 63.5 °F Dew Point: 41 °F Humidity: 44% Wind: North at - Pressure: 29.99 in Hourly Precipitation: 0.00 in Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 3:50 PM CDT

Temperature: 60.9 °F Dew Point: 40 °F Humidity: 46% Wind: NNW at 3.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 3:39 PM CDT

Temperature: 69.4 °F Dew Point: 47 °F Humidity: 45% Wind: ESE at 2.7 mph Pressure: 29.89 in Hourly Precipitation: - Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 3:51 PM CDT

Temperature: 64.1 °F Dew Point: 42 °F Humidity: 44% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Shipman, IL

Updated: 2:20 PM CDT

Temperature: 57 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Kelly Greens Weather Station, Edwardsville, IL

Updated: 3:41 PM CDT

Temperature: 61.1 °F Dew Point: 54 °F Humidity: 79% Wind: Calm Pressure: 29.67 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Hamel, IL

Updated: 2:30 PM CDT

Temperature: 58 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Birmingham Drive, Glen Carbon, IL

Updated: 3:52 PM CDT

Temperature: 67.6 °F Dew Point: 49 °F Humidity: 50% Wind: North at - Pressure: 29.97 in Hourly Precipitation: - Graphs

Location: Stonebridge Farms, Maryville, IL

Updated: 3:53 PM CDT

Temperature: 60.6 °F Dew Point: 40 °F Humidity: 47% Wind: NNW at 12.1 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Graphs

Location: Prairie Manor, Edwardsville, IL

Updated: 3:53 PM CDT

Temperature: 60.3 °F Dew Point: 33 °F Humidity: 36% Wind: ENE at 8.9 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 3:53 PM CDT

Temperature: 61.4 °F Dew Point: 39 °F Humidity: 44% Wind: North at 10.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Graphs

Location: 1 Mile South of St. Louis Lambert Airport, Woodson Terrace, MO

Updated: 3:53 PM CDT

Temperature: 60.8 °F Dew Point: 44 °F Humidity: 53% Wind: NNW at 4.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 3:53 PM CDT

Temperature: 63.0 °F Dew Point: 36 °F Humidity: 37% Wind: South at 1.3 mph Pressure: 29.26 in Hourly Precipitation: 0.00 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
311 PM CDT sun Apr 26 2015 


Short term: (through late tonight) 
issued at 300 PM CDT sun Apr 26 2015 


An expansive area of high pressure will continue to build southward 
through the Mississippi Valley leading to light winds and a cool 
night across the region. Skies will be predominately clear with an 
increase in high clouds late tonight across southern Missouri in 
assocation with the advancing southwestern U.S. Upper low. Outside 
of the highly urbanized areas, temperatures early Monday morning 
will bottom out in the upper 30s. If temps drop 2-3 degrees cooler 
than currently forecast in some of the remote areas, there could 
be some short-lived patchy frost. 


Glass 


Long term: (monday through next sunday) 
issued at 300 PM CDT sun Apr 26 2015 


The pattern looks to remain tranquil through the bulk of the week. 
The eastern U.S. Vortex/upper trof will migrate eastward but will keep 
high pressure locked in at the surface. Meanwhile the southwest 
U.S. Upper low/trof will continue to advance into the Southern 
Plains on Tuesday and into the lower MS valley Tuesday night/Wed. The 
main influence of this southern system should be just an increase 
in high clouds. Something to keep an eye on however is an upper 
low/trof that will drop south from the upper MS valley and into 
nation's midsection on Wednesday following in behind the eastward 
migrating southern system. A rather prominent cold pocket aloft 
with accompany this southward dropping upper low, which will 
contribute to more cloud cover and possibly some isolated diurnally 
driven showers. At this time I have the forecast void of any 
precipitation, but it is something we will have to key a close eye 
on as the period gets closer. 


By late Thursday the two systems merge into an elongated positively 
tilted trof centered through the eastern U.S. Which eventually 
progresses off the Atlantic coast by early Saturday. Height rises 
will commence in the wake of this departing trof beginning on 
Thursday as the whole upper air pattern across the Continental U.S. Transitions 
to a much flatter flow regime and ridging aloft builds eastward 
through the MS valley. Accompanying the transition will be a 
return of warmer temperatures by next weekend, and possibly a 
threat of a few showers and thunderstorms associated with low 
level warm advection/moisture return and weak migratory disturbances 
topping the Flat Ridge aloft. 


Glass 


&& 


Aviation: (for the 18z tafs through 18z Monday afternoon) 
issued at 1241 PM CDT sun Apr 26 2015 


Ridge of high pressure is building across the region. Expect 
northeast flow to continue, and remaining MVFR clouds to continue 
pushing south/southwest through the afternoon and early evening. 
VFR flight conditions are expected to prevail outside of the areas 
of lingering clouds this afternoon, and will prevail after the 
clouds exit the forecast area. 


Specifics for kstl: 


VFR flight conditions and northeast wind will prevail at Lambert 
through Monday. Prevailing wind direction will be nearly a direct 
crosswind on the main runways. Tried to give the best prevailing 
wind direction possible, which looks to be south of 30 degrees for 
most of the period through Monday. That being said, occasional 
jogs north of 30 degrees look likely through this afternoon. 


Carney 


&& 


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


$$ 


Weather forecast office lsx 



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