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Hartford, Illinois Weather Forecast
Hartford, Illinois Weather
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Weather Forecast for Hartford, Illinois : Madison County
Issued: 7:01 pm CST Jan 20, 2026 Latitude: 38.8333815 Longitude: -90.09594 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Mostly Cloudy on Tonight Clearing on Wednesday Partly Sunny on Thursday Mostly Cloudy on Friday 40% chance of snow on Saturday Partly Sunny on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday
Low: 29°F High: 42°F High: 37°F High: 15°F High: 15°F High: 22°F High: 25°F High: 36°F
Low: 23°F Low: 10°F Low: 2°F Low: 8°F Low: 6°F Low: 11°F  
Mostly Cloudy Clearing Partly Sunny Mostly Cloudy Snow Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
ALTON - (KALN)
30°
Feels like 20°F
Clear
as of 6:50 PM CST
Rel. Humidity: 39%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
13 MPH
150° Southeast
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
36°
Feels like 27°F
Mostly Cloudy
as of 6:51 PM CST
Rel. Humidity: 29%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: VFR
Wind Data
12 MPH
160° South
Cloud Level(s): Broken at 16000ft
Current Conditions at
ST CHARLES - (KSET)
34°
Feels like 25°F
Clear
as of 6:54 PM CST
Rel. Humidity: 34%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
12 MPH
150° Southeast
Cloud Level(s): Clear
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 29. South wind 9 to 13 mph, with gusts as high as 22 mph.

Clearing on Wednesday Wednesday... Mostly cloudy through mid morning, then gradual clearing, with a high near 42. Southwest wind 9 to 14 mph becoming west in the morning. Winds could gust as high as 21 mph.

Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 23. Southwest wind 6 to 11 mph becoming northwest after midnight. Winds could gust as high as 22 mph.

Partly Sunny on Thursday Thursday... Partly sunny, with a high near 37. Northwest wind around 6 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 21 mph.

Mostly Cloudy on Friday Friday... Mostly cloudy and cold, with a high near 15.

20% chance of snow Friday Night Friday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 2.

40% chance of snow Saturday Saturday... A 40 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 15.

30% chance of snow Saturday Night Saturday Night... A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 8.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 22.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 6.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 25.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 11.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 36.

Current Radar Image


Sun Almanac for Hartford, Illinois
Sunrise: 07:15 AM
Sunset: 5:08 PM
Civil Sunrise:06:46 AM
Civil Sunset: 5:37 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 6:09 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:41 PM
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.