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.

Overcast and Breezy

65°F

18°C

Humidity 86%
Wind Speed NW 23 G 31 mph
Barometer 29.98 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 15 Oct 10:35 pm CDT
Extended Forecast for

Hillsboro IL

  • Tonight

    Tonight: Scattered showers, mainly before midnight. Partly cloudy early, then becoming cloudy, with a low around 46. Light west wind becoming northwest 11 to 16 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 40%.

    Low: 46 °F

    Scattered
    Showers

  • Friday

    Friday: Scattered showers, mainly between 2pm and 3pm. Mostly cloudy, with a high near 54. Northwest wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.

    High: 54 °F

    Mostly Cloudy
    then
    Scattered
    Showers

  • Friday Night

    Friday Night: Cloudy during the early evening, then gradual clearing, with a low around 35. North wind 8 to 16 mph, with gusts as high as 26 mph.

    Low: 35 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 33. Calm wind.

    Low: 33 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers, mainly before midnight. Partly cloudy early, then becoming cloudy, with a low around 46. Light west wind becoming northwest 11 to 16 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 40%.
Friday
Scattered showers, mainly between 2pm and 3pm. Mostly cloudy, with a high near 54. Northwest wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 35. North wind 8 to 16 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.
Saturday Night
Clear, with a low around 33. Calm wind.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 36.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro IL
 39.15°N 89.49°W (Elev. 617 ft)
Last Update:
10:26 pm CDT Oct 15, 2026
Forecast Valid:
10pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation