National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

73°F

23°C

Humidity 92%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 7 Jul 11:55 pm CDT
Extended Forecast for

Hartford IL

  • Overnight

    Overnight: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 90. Calm wind.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72. Light southeast wind.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 95. Heat index values as high as 101. South wind 3 to 7 mph.

    High: 95 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 74. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.

    Low: 74 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 91. Chance of precipitation is 60%.

    High: 91 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 70%.

    Low: 72 °F

    T-storms
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 88.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 70. Calm wind.
Wednesday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 90. Calm wind.
Wednesday Night
Mostly clear, with a low around 72. Light southeast wind.
Thursday
Mostly sunny, with a high near 95. Heat index values as high as 101. South wind 3 to 7 mph.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 74. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 91. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 70%.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 88.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 91.
Monday Night
Clear, with a low around 72.
Tuesday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hartford IL
 38.84°N 90.11°W (Elev. 407 ft)
Last Update:
12:11 am CDT Jul 8, 2026
Forecast Valid:
12am CDT Jul 8, 2026-6pm CDT Jul 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation