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

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Overcast

47°F

8°C

Humidity 55%
Wind Speed NE 5 mph
Barometer 29.80 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 26 Feb 1:35 am CST
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 46. Northeast wind 3 to 6 mph.

    Low: 46 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 57. Northeast wind around 6 mph becoming calm in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65. Light south southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43. South southwest wind around 6 mph becoming light and variable after midnight.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67. Light and variable wind becoming south 5 to 8 mph in the morning.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers. Mostly clear, with a low around 36. South southwest wind 6 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 36 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of rain showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 46. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 46 °F

    Slight Chance
    Showers then
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow showers likely before midnight, then rain showers, snow showers, and freezing rain likely. Cloudy, with a low around 32. Northeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Wintry Mix
    Likely

Detailed Forecast

Overnight
A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 46. Northeast wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 57. Northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 36. Calm wind.
Friday
Sunny, with a high near 65. Light south southwest wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 43. South southwest wind around 6 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 67. Light and variable wind becoming south 5 to 8 mph in the morning.
Saturday Night
A 20 percent chance of showers. Mostly clear, with a low around 36. South southwest wind 6 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Sunday
A slight chance of rain showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 46. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Rain and snow showers likely before midnight, then rain showers, snow showers, and freezing rain likely. Cloudy, with a low around 32. Northeast wind around 10 mph, with gusts as high as 18 mph.
Monday
A chance of rain and snow showers before noon, then a slight chance of rain showers. Cloudy, with a high near 44. Northeast wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 31. East northeast wind around 6 mph.
Tuesday
A chance of showers. Cloudy, with a high near 49. East northeast wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
A chance of showers. Cloudy, with a low around 36. North northwest wind around 6 mph becoming northeast after midnight.
Wednesday
A chance of showers. Mostly cloudy, with a high near 55. Northeast wind 6 to 8 mph becoming east southeast in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
12:46 am CST Feb 26, 2026
Forecast Valid:
1am CST Feb 26, 2026-6pm CST Mar 4, 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