Alton, Illinois Weather
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Weather Forecast for Alton, Illinois : Madison County
Issued: 6:32 pm CDT May 25, 2022 Latitude: 38.8906038 Longitude: -90.1842764 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Memorial Day Tuesday Wednesday
40% chance of thunderstorms on Tonight 90% chance of thunderstorms on Thursday 30% chance of thunderstorms on Friday Sunny on Saturday Mostly Sunny on Sunday Sunny on Memorial Day Sunny on Tuesday 20% chance of thunderstorms on Wednesday
Low: 64°F High: 71°F High: 70°F High: 80°F High: 85°F High: 91°F High: 91°F High: 91°F
Low: 56°F Low: 55°F Low: 62°F Low: 70°F Low: 70°F Low: 70°F  
Thunderstorms Thunderstorms Thunderstorms Sunny Mostly Sunny Sunny Sunny Thunderstorms
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Current Conditions at
ALTON - (KALN)
72°
Partly Cloudy
as of 7:50 PM CDST
Rel. Humidity: 88%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 29.73 in.
Flight Rule: VFR
Wind Data
5 MPH
180° South
Cloud Level(s): Scattered at 2300ft, Scattered at 4300ft
Current Conditions at
ST CHARLES - (KSET)
72°
Partly Cloudy
as of 7:54 PM CDST
Rel. Humidity: 83%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.70 in.
Flight Rule: VFR
Wind Data
9 MPH
150° Southeast
Cloud Level(s): Scattered at 5500ft
Current Conditions at
ST LOUIS - (KSTL)
72°
Mostly Cloudy
as of 7:51 PM CDST
Rel. Humidity: 78%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.72 in.
Flight Rule: VFR
Wind Data
8 MPH
160° South
Cloud Level(s): Few at 4500ft, Scattered at 18000ft, Broken at 25000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
73°
Clear
as of 7:53 PM CDST
Rel. Humidity: 73%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.71 in.
Flight Rule: VFR
Wind Data
8 MPH
170° South
Cloud Level(s): Clear
40% chance of thunderstorms Tonight Tonight... A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 64. South wind 7 to 14 mph, with gusts as high as 21 mph.

90% chance of thunderstorms Thursday Thursday... Showers and thunderstorms before noon, then showers and possibly a thunderstorm, mainly after noon. High near 71. South wind around 9 mph. Chance of precipitation is 90%.

70% chance of thunderstorms Thursday Night Thursday Night... Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. West wind 6 to 8 mph. Chance of precipitation is 70%.

30% chance of thunderstorms Friday Friday... A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 70. Northwest wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 55. Northwest wind 5 to 9 mph becoming calm in the evening.

Sunny on Saturday Saturday... Sunny, with a high near 80.

Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 62.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 85.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 70.

Sunny on Memorial Day Memorial Day... Sunny, with a high near 91.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 70.

Sunny on Tuesday Tuesday... Sunny, with a high near 91.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 70.

20% chance of thunderstorms Wednesday Wednesday... A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.

Sun Almanac for Alton, Illinois
Sunrise: 05:41 AM
Sunset: 8:15 PM
Civil Sunrise:05:10 AM
Civil Sunset: 8:46 PM
Nautical Sunrise: 04:31 AM
Nautical Sunset: 9:24 PM
Astro Sunrise: 03:48 AM
Astro Sunset: 10:07 PM
Moon Almanac for Alton, Illinois
Moon Phase: Waning Crescent
Moon Illumination: 18%
Moon Age: 25.4 Days
Moon is currently below the horizon
Distance from Moon to Earth: 240,591 miles
Upcoming Lunar Events for
Alton:
Next EventEvent TimeIllum

Moonrise:03:44 am Thu15.8%
High Moon:10:10 am Thu13.9%
Moonset:04:45 pm Thu12.0%
New Moon: Sat Apr 30
First Quarter: Sun May 8
Full Moon: Mon May 16
Last Quarter: Sun May 22
New Moon: Mon May 30
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.