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.

Fog/Mist

52°F

11°C

Humidity 85%
Wind Speed NE 8 mph
Barometer 30.36 in
Dewpoint 48°F (9°C)
Visibility 5.00 mi
Wind Chill49°F (9°C)
Last update 11 Apr 7:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. East wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 20%.

    High: 77 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 60. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 83. South southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South wind 11 to 15 mph, with gusts as high as 26 mph.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. South southwest wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South southwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 70 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 86. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. East wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 60. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 83. South southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South wind 11 to 15 mph, with gusts as high as 26 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. South southwest wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 69. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 86. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South southwest wind around 11 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southwest wind 7 to 9 mph.
Thursday
Showers and thunderstorms likely. Mostly cloudy, with a high near 83. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. South southwest wind 5 to 7 mph.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. South southwest wind 6 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:
3:41 am CDT Apr 11, 2026
Forecast Valid:
8am CDT Apr 11, 2026-6pm CDT Apr 17, 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