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

71°F

22°C

Humidity 35%
Wind Speed SW 15 mph
Barometer 30.31 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 9 Apr 11:15 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Sunny, with a high near 78. South southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. South wind around 6 mph.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 80. South southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 80 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Light northeast wind. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Light and variable wind becoming southeast around 5 mph in the afternoon.

    High: 80 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Southeast wind 3 to 5 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 83. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 78. South southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 56. South wind around 6 mph.
Friday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 80. South southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Light northeast wind. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Light and variable wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 59. Southeast wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 83. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Monday Night
Mostly cloudy, with a low around 68. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South southwest wind around 11 mph, with gusts as high as 21 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
4:41 am CDT Apr 9, 2026
Forecast Valid:
11am CDT Apr 9, 2026-6pm CDT Apr 15, 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