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

52°F

11°C

Humidity 69%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 8 Apr 10:55 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Clear, with a low around 54. South wind 6 to 8 mph.

    Low: 54 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 77. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. South wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 79. South southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 56. Light and variable wind. Chance of precipitation is 30%.

    Low: 56 °F

    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.

    High: 80 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60. East southeast wind 3 to 5 mph.

    Low: 60 °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 66. South wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 54. South wind 6 to 8 mph.
Thursday
Sunny, with a high near 77. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 55. South wind around 6 mph.
Friday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 79. South southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 56. Light and variable wind. Chance of precipitation is 30%.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 60. East 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 66. South wind 10 to 14 mph, with gusts as high as 25 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. South southwest wind 14 to 18 mph, with gusts as high as 29 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South southwest wind 11 to 13 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. 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 75. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
10:26 pm CDT Apr 8, 2026
Forecast Valid:
11pm CDT Apr 8, 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