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.

Fair

56°F

13°C

Humidity 33%
Wind Speed W 16 mph
Barometer 29.59 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 20 Feb 1:15 am CST
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Mostly clear, with a low around 39. West wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 39 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49. West wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after midnight. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 32. Light north wind.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 44. Northwest wind 3 to 8 mph.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Northwest wind 6 to 10 mph.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 18. Northwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 18 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 35. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 35 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 18. Light and variable wind.

    Low: 18 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 39. West wind 9 to 14 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 49. West wind 5 to 14 mph, with gusts as high as 23 mph.
Friday Night
A 20 percent chance of showers after midnight. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 32. Light north wind.
Saturday
Mostly sunny, with a high near 44. Northwest wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 24. Northwest wind 6 to 10 mph.
Sunday
Sunny, with a high near 38. Northwest wind 10 to 17 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 18. Northwest wind around 11 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 35. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 18. Light and variable wind.
Tuesday
Mostly sunny, with a high near 46. Light south southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 38. South southwest wind 10 to 13 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 56. Southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 36. Southwest wind around 7 mph becoming northwest after midnight.
Thursday
A slight chance of showers. Mostly sunny, with a high near 54. North northwest wind 6 to 8 mph becoming northeast in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
1:12 am CST Feb 20, 2026
Forecast Valid:
1am CST Feb 20, 2026-6pm CST Feb 26, 2026
 
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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