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

53°F

12°C

Humidity 38%
Wind Speed Calm
Barometer 29.78 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 25 Feb 2:55 pm CST
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 56. Calm wind.

    High: 56 °F

    Cloudy

  • Tonight

    Tonight: A 50 percent chance of showers, mainly after 10pm. Mostly cloudy, with a low around 39. Calm wind becoming northeast around 6 mph after midnight.

    Low: 39 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 56. Northeast wind around 6 mph becoming calm in the afternoon.

    High: 56 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 43. South southwest wind 3 to 6 mph.

    Low: 43 °F

    Clear

  • Saturday

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

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, 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

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers after noon. Mostly cloudy, with a high near 51. East northeast wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 51 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

This Afternoon
Cloudy, with a high near 56. Calm wind.
Tonight
A 50 percent chance of showers, mainly after 10pm. Mostly cloudy, with a low around 39. Calm wind becoming northeast around 6 mph after midnight.
Thursday
Mostly sunny, with a high near 56. Northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 37. Calm wind.
Friday
Sunny, with a high near 65. Calm wind becoming southwest 5 to 7 mph in the morning.
Friday Night
Clear, with a low around 43. South southwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 67. Light and variable wind becoming south southwest 5 to 8 mph in the morning.
Saturday Night
Partly cloudy, 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 showers after noon. Mostly cloudy, with a high near 51. East northeast wind 8 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Rain likely, possibly mixed with snow showers, mainly after midnight. Cloudy, with a low around 34. East northeast wind 8 to 10 mph.
Monday
A chance of rain and snow showers. Cloudy, with a high near 45. Northeast wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers. Cloudy, with a low around 33. East northeast wind around 6 mph.
Tuesday
A chance of showers. Cloudy, with a high near 50. East wind around 7 mph becoming west southwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
2:36 pm CST Feb 25, 2026
Forecast Valid:
3pm CST Feb 25, 2026-6pm CST Mar 3, 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