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

46°F

8°C

Humidity 49%
Wind Speed NE 8 mph
Barometer 30.39 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 23 Mar 7:35 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. East northeast wind 5 to 8 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 63. East wind 3 to 5 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. Light east wind.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 45. South southwest wind around 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph.

    Low: 45 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 54. North wind around 17 mph, with gusts as high as 26 mph.

    High: 54 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. North wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 37. East northeast wind 5 to 8 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 63. East wind 3 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 44. Light east wind.
Wednesday
Mostly sunny, with a high near 74. Calm wind becoming south southwest 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 61. South wind 6 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 45. South southwest wind around 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 54. North wind around 17 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 32. North wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 57. Northeast wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 37. Light east southeast wind.
Sunday
Mostly sunny, with a high near 65. South wind 3 to 7 mph.
Sunday Night
Mostly cloudy, with a low around 48. South southeast wind 3 to 6 mph.
Monday
A slight chance of showers. Mostly sunny, with a high near 71. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
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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:
7:36 pm CDT Mar 23, 2026
Forecast Valid:
7pm CDT Mar 23, 2026-6pm CDT Mar 30, 2026
 
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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