Alton, Illinois Weather Conditions

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Current Conditions

  • 64°
  • Clear
  • Wind: East 6 mph
  • Humidity: 80%
  • Visibility: 10.0 miles
  • Dew Point: 57°
  • Pressure: 30.12 in. +

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Next 12 Hours

5  am
8  am
11  am
2  pm
5  pm
Overcast
Overcast
Overcast
Overcast
Mostly Cloudy
Mostly Cloudy
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
62°
67°
75°
79°
80°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Chance of a Thunderstorm
  • High: 82 °
  • Low: 68 °
  • Chance of T-Storms
  • Monday
  • Overcast
  • High: 81 °
  • Low: 67 °
  • Overcast
  • Tuesday
  • Thunderstorm
  • High: 75 °
  • Low: 64 °
  • T-Storms
  • Wednesday
  • Chance of a Thunderstorm
  • High: 83 °
  • Low: 64 °
  • Chance of T-Storms
  • Thursday
  • Partly Cloudy
  • High: 86 °
  • Low: 67 °
  • Partly Cloudy

Forecast for Alton, Illinois

Updated: 1:00 AM CDT on January 24, 2015

  • Sunday

    Cloudy early. Scattered thunderstorms developing later in the day. High 82F. Winds SSE at 10 to 20 mph. Chance of rain 40%.

  • Sunday Night

    Scattered thunderstorms in the evening, then mainly cloudy overnight with thunderstorms likely. Low 68F. Winds SSE at 10 to 20 mph. Chance of rain 80%.

  • Monday

    Cloudy skies. A stray thunderstorm is possible. High 81F. Winds SSW at 10 to 20 mph.

  • Monday Night

    Cloudy in the evening, then thunderstorms developing after midnight. Low 67F. Winds S at 10 to 20 mph. Chance of rain 80%.

  • Tuesday

    Thunderstorms likely. High around 75F. Winds SSW at 10 to 20 mph. Chance of rain 80%.

  • Tuesday Night

    Scattered thunderstorms during the evening, then partly cloudy overnight. Low 64F. Winds SSW at 5 to 10 mph. Chance of rain 60%.

  • Wednesday

    Partial cloudiness early, with scattered showers and thunderstorms in the afternoon. High 83F. Winds WSW at 5 to 10 mph. Chance of rain 40%.

  • Wednesday Night

    Some clouds early will give way to generally clear conditions overnight. Low 64F. Winds light and variable.

  • Thursday

    Partly cloudy skies. High 86F. Winds S at 5 to 10 mph.

  • Thursday Night

    A few clouds. Low 67F. Winds S at 5 to 10 mph.

  • Friday

    Isolated thunderstorms in the morning, then skies turning partly cloudy late. High 86F. Winds SSW at 10 to 15 mph. Chance of rain 30%.

  • Friday Night

    Variable clouds with scattered thunderstorms. Low 68F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Saturday

    Scattered thunderstorms. High near 80F. Winds SSW at 10 to 20 mph. Chance of rain 50%.

  • Saturday Night

    Scattered thunderstorms in the evening with a few showers possible late. Low 62F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Sunday

    Showers early then scattered thunderstorms developing later in the day. High around 75F. Winds WSW at 10 to 15 mph. Chance of rain 50%.

  • Sunday Night

    Considerable cloudiness. Low around 60F. Winds NNW at 5 to 10 mph.

  • Monday

    Sunshine and clouds mixed. High 79F. Winds NW at 5 to 10 mph.

  • Monday Night

    Some clouds early will give way to generally clear conditions overnight. Low 63F. Winds ESE at 5 to 10 mph.

  • Tuesday

    Scattered thunderstorms, especially in the morning. High 82F. Winds SSE at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy skies early followed by mostly cloudy skies and a few showers later at night. Low 66F. Winds S at 5 to 10 mph. Chance of rain 30%.

  • Wednesday

    Variable clouds with thunderstorms, especially in the afternoon. High 84F. Winds SSW at 10 to 15 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy with an isolated thunderstorm possible after midnight. Low 67F. Winds S at 5 to 10 mph. Chance of rain 30%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Alton, IL

Updated: 3:49 AM CDT

Temperature: 65.3 °F Dew Point: 56 °F Humidity: 72% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Alton - Beacon, Alton, IL

Updated: 3:53 AM CDT

Temperature: 68.4 °F Dew Point: 56 °F Humidity: 66% Wind: ENE at 2.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Alton - Christian Hill Area, Alton, IL

Updated: 3:50 AM CDT

Temperature: 67.0 °F Dew Point: 54 °F Humidity: 64% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

Location: Alton - Rock Gate Estates, Alton, IL

Updated: 3:50 AM CDT

Temperature: 64.5 °F Dew Point: 57 °F Humidity: 77% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 3:44 AM CDT

Temperature: 66.8 °F Dew Point: 55 °F Humidity: 67% Wind: SSE at 2.0 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Graphs

Location: Brecht Ln, Godfrey, IL

Updated: 3:51 AM CDT

Temperature: 66.6 °F Dew Point: 54 °F Humidity: 63% Wind: Calm Pressure: 29.96 in Hourly Precipitation: - Graphs

Location: WEST ALTON, West Alton, MO

Updated: 1:50 AM CDT

Temperature: 69.3 °F Dew Point: - Humidity: 62% Wind: North at - Pressure: - Hourly Precipitation: - Graphs

Location: Godfrey River Aire Subdivision, Godfrey, IL

Updated: 3:53 AM CDT

Temperature: 64.6 °F Dew Point: 56 °F Humidity: 73% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 3:45 AM CDT

Temperature: 66.6 °F Dew Point: 54 °F Humidity: 65% Wind: Calm Pressure: 29.76 in Hourly Precipitation: - Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 3:53 AM CDT

Temperature: 65.6 °F Dew Point: 53 °F Humidity: 64% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

Location: Whispering Oaks Drive, Bethalto, IL

Updated: 3:50 AM CDT

Temperature: 66.7 °F Dew Point: 53 °F Humidity: 61% Wind: North at - Pressure: 30.22 in Hourly Precipitation: - Graphs

Location: Foster Township, Alton, IL

Updated: 3:46 AM CDT

Temperature: 64.6 °F Dew Point: 58 °F Humidity: 78% Wind: NE at 2.2 mph Pressure: 30.06 in Hourly Precipitation: - Graphs

Location: Jersey County along IL 111, Brighton, IL

Updated: 3:52 AM CDT

Temperature: 64.0 °F Dew Point: 54 °F Humidity: 71% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Graphs

Location: Timber Ridge, Godfrey, IL

Updated: 3:50 AM CDT

Temperature: 66.0 °F Dew Point: 58 °F Humidity: 74% Wind: ESE at 1.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Bethalto, IL

Updated: 3:53 AM CDT

Temperature: 65.8 °F Dew Point: 8 °F Humidity: 10% Wind: NNE at 3.1 mph Pressure: 26.61 in Hourly Precipitation: 0.00 in Graphs

Location: Riverside at Albers Pointe, Florissant, MO

Updated: 3:44 AM CDT

Temperature: 62.2 °F Dew Point: 54 °F Humidity: 80% Wind: North at - Pressure: 30.07 in Hourly Precipitation: - Graphs

Location: Alber Pointe Drive, Florissant, MO

Updated: 3:51 AM CDT

Temperature: 62.2 °F Dew Point: 56 °F Humidity: 80% Wind: North at - Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Granite City, IL

Updated: 1:30 AM CDT

Temperature: 67 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Grand Ave, Edwardsville, IL

Updated: 3:53 AM CDT

Temperature: 64.8 °F Dew Point: 58 °F Humidity: 78% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Graphs

Location: Knight Compound, Dorsey, IL

Updated: 3:53 AM CDT

Temperature: 60.6 °F Dew Point: 58 °F Humidity: 90% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Graphs

Location: Riverwood Place, Florissant, MO

Updated: 3:53 AM CDT

Temperature: 66.5 °F Dew Point: 57 °F Humidity: 72% Wind: SE at 3.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: 27th Street, Granite City, IL

Updated: 3:51 AM CDT

Temperature: 68.9 °F Dew Point: 57 °F Humidity: 65% Wind: North at - Pressure: 30.16 in Hourly Precipitation: 0.00 in Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 3:50 AM CDT

Temperature: 64.0 °F Dew Point: 56 °F Humidity: 76% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 3:44 AM CDT

Temperature: 65.8 °F Dew Point: 57 °F Humidity: 74% Wind: ESE at 1.1 mph Pressure: 30.05 in Hourly Precipitation: - Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 3:47 AM CDT

Temperature: 63.4 °F Dew Point: 56 °F Humidity: 78% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Shipman, IL

Updated: 12:10 AM CDT

Temperature: 65 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Kelly Greens Weather Station, Edwardsville, IL

Updated: 3:51 AM CDT

Temperature: 61.4 °F Dew Point: 55 °F Humidity: 79% Wind: Calm Pressure: 29.68 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest, Hamel, IL

Updated: 2:25 AM CDT

Temperature: 61 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Birmingham Drive, Glen Carbon, IL

Updated: 3:50 AM CDT

Temperature: 65.7 °F Dew Point: 52 °F Humidity: 62% Wind: North at - Pressure: 30.16 in Hourly Precipitation: - Graphs

Location: Stonebridge Farms, Maryville, IL

Updated: 3:53 AM CDT

Temperature: 64.2 °F Dew Point: 55 °F Humidity: 72% Wind: ESE at 6.9 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Prairie Manor, Edwardsville, IL

Updated: 3:53 AM CDT

Temperature: 63.7 °F Dew Point: 54 °F Humidity: 72% Wind: ESE at 6.5 mph Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 3:53 AM CDT

Temperature: 63.6 °F Dew Point: 56 °F Humidity: 76% Wind: ESE at 2.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 3:53 AM CDT

Temperature: 66.3 °F Dew Point: 57 °F Humidity: 72% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 3:53 AM CDT

Temperature: 64.8 °F Dew Point: 52 °F Humidity: 64% Wind: North at 2.0 mph Pressure: 29.44 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 
320 am CDT sun may 24 2015 


Short term: (through late this afternoon) 
issued at 318 am CDT sun may 24 2015 


Will see an gradual increase in rain chances today...particularly 
over the western and northern parts of the County Warning Area as the upper ridge 
moves off to the east which will allow for southwesterly upper flow 
to establish itself over the area. Large area of rain over central 
and western Missouri is being generated in an area of strong low 
level moisture convergence under the broad area of upper level 
ascent. This low level moisture convergence will shift eastward 
today and is being picked up well by the 00z nmm WRF. 


Britt 


Long term: (tonight through saturday) 
issued at 318 am CDT sun may 24 2015 


(tonight through tuesday) 


The NAM has been the most consistent of the models as of late. A 
notable shortwave will move across the area tonight which will bring 
stronger ascent along with strong low moisture convergence ahead of 
it. Will continue with likely or categorical pops over the entire 
area. Then Memorial Day still looks mostly dry as subsidence sets 
in behind aforementioned shortwave trough. Will keep high chance 
and likely pops on Monday night as the next shortwave trough moves 
across the area. Will also keep likely pops on Tuesday as yet 
another shortwave moves across the area. 


Will stick closer to the NAM MOS guidance for temperatures based on 
model preference. 


(Wednesday through next saturday) 


Will continue to go with chances of showers and thunderstorms for 
most of the extended part of the forecast as a series of shortwaves 
moves across the area. A quasi-stationary front will over the area 
which is typical for late may and temperatures will be determined be 
what side the front is on. 


Britt 


&& 


Aviation: (for the 06z tafs through 06z Sunday night) 
issued at 1102 PM CDT Sat may 23 2015 


Mid-high level clouds will continue across the area late tonight 
with at least light showers moving through cou late tonight and 
possibly into uin towards morning. Could not rule out sprinkles in 
the St Louis Metro area late tonight, but the better chance of 
showers/storms should hold off until Sunday afternoon and night as 
a sly low level jet moves through the area. Prevailing cloud 
ceilings will also lower on Sunday, likely into the MVFR catagory 
in uin and cou and down to MVFR or at least low end VFR in the St 
Louis Metro area by afternoon. Sely surface wind will continue 
late tonight, becoming relatively strong and gusty from a S-sely 
direction on Sunday. 


Specifics for kstl: prevailing VFR mid level cloudiness late 
tonight, then the ceiling will lower into the MVFR or low end VFR 
catagory by Sunday afternoon. May be some sprinkles late tonight 
from mid level clouds, but the better threat of showers/storms 
should occur Sunday afternoon and night. Sely surface wind 
late tonight will strengthen and become gusty by late Sunday 
morning or afternoon from a S-sely direction. 


Gks 


&& 


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


$$ 


Weather forecast office lsx 












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