Alton, Illinois Weather
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Weather Forecast for Alton, Illinois : Madison County
Issued: 6:10 am CDT Oct 18, 2021 Latitude: 38.8906038 Longitude: -90.1842764 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Sunny on Today Mostly Clear on Tonight Mostly Sunny on Tuesday 40% chance of thunderstorms on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Sunny on Saturday 40% chance of  on Sunday
High: 75°F Low: 48°F High: 74°F High: 77°F High: 65°F High: 62°F High: 62°F High: 64°F
Low: 52°F Low: 52°F Low: 46°F Low: 42°F Low: 46°F  
Sunny Mostly Clear Mostly Sunny Thunderstorms Mostly Sunny Mostly Sunny Sunny Partly Sunny
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Current Conditions at
ALTON - (KALN)
43°
Clear
as of 6:15 AM CDST
Rel. Humidity: 100%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ST CHARLES - (KSET)
43°
Clear
Mist
as of 6:08 AM CDST
Rel. Humidity: 86%
Dew Point: 39°F
Visibility: 3 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
52°
Clear
as of 5:51 AM CDST
Rel. Humidity: 66%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
43°
Clear
as of 5:53 AM CDST
Rel. Humidity: 100%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 75. Light south wind increasing to 5 to 9 mph in the morning.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 48. South wind 5 to 7 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 74. South wind 5 to 13 mph, with gusts as high as 21 mph.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 52. South wind 6 to 9 mph.

40% chance of thunderstorms Wednesday Wednesday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. South wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

30% chance of thunderstorms Wednesday Night Wednesday Night... A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 52.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 65.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 46.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 62.

Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 42.

Sunny on Saturday Saturday... Sunny, with a high near 62.

30% chance of rain Saturday Night Saturday Night... A 30 percent chance of showers. Partly cloudy, with a low around 46.

40% chance of  Sunday Sunday... A 40 percent chance of showers. Partly sunny, with a high near 64.

Sun Almanac for Alton, Illinois
Sunrise: 07:14 AM
Sunset: 6:18 PM
Civil Sunrise:06:47 AM
Civil Sunset: 6:45 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 7:16 PM
Astro Sunrise: 05:45 AM
Astro Sunset: 7:47 PM
Moon Almanac for Alton, Illinois
Moon Phase: Waxing Gibbous
Moon Illumination: 95%
Moon Age: 12.7 Days
Moon is currently below the horizon
Distance from Moon to Earth: 243,027 miles
Upcoming Lunar Events for
Alton:
Next EventEvent TimeIllum

Moonrise:05:46 pm Mon97.1%
High Moon:11:52 pm Mon97.9%
Moonset:06:07 am Tue98.6%
New Moon: Wed Oct 6
First Quarter: Tue Oct 12
Full Moon: Wed Oct 20
Last Quarter: Thu Oct 28
New Moon: Thu Nov 4
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.