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.

Mostly Cloudy

76°F

24°C

Humidity 62%
Wind Speed S 12 G 28 mph
Barometer 30.05 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 6 Mar 11:15 am CST
Extended Forecast for

Harrisburg IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly before 4pm. Mostly sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 80 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 63. South wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 73. South southwest wind 10 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    High: 73 °F

    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming calm after midnight. Chance of precipitation is 30%.

    Low: 42 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66. Calm wind becoming west southwest around 5 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 74. South southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 74 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly after midnight. Partly cloudy, with a low around 60. South southwest wind around 8 mph.

    Low: 60 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 76. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 76 °F

    Showers
    Likely

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly before 4pm. Mostly sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 63. South wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Saturday
Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 73. South southwest wind 10 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming calm after midnight. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 66. Calm wind becoming west southwest around 5 mph.
Sunday Night
Mostly clear, with a low around 48. Calm wind becoming south southwest around 5 mph after midnight.
Monday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 74. South southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Monday Night
A chance of showers, mainly after midnight. Partly cloudy, with a low around 60. South southwest wind around 8 mph.
Tuesday
Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 76. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely after midnight. Mostly cloudy, with a low around 60. South southwest wind 13 to 16 mph, with gusts as high as 29 mph.
Wednesday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 70. South southwest wind 13 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 41. North wind 9 to 11 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 57. North northeast 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 88.58°W
Last Update:
11:01 am CST Mar 6, 2026
Forecast Valid:
11am CST Mar 6, 2026-6pm CDT Mar 12, 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