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.

Partly Cloudy

44°F

7°C

Humidity 74%
Wind Speed Calm
Barometer 30.29 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 20 Apr 5:35 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Sunny, with a high near 69. Light and variable wind.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 50. Calm wind becoming south around 6 mph after midnight.

    Low: 50 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Southwest wind 6 to 14 mph, with gusts as high as 24 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56. South wind 3 to 6 mph.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82. South wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 78. South wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 78 °F

    Showers

Detailed Forecast

Today
Sunny, with a high near 69. Light and variable wind.
Tonight
Clear, with a low around 50. Calm wind becoming south around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 78. Southwest wind 6 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 55. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 79. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Clear, with a low around 56. South wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 82. South wind 6 to 14 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. South wind around 10 mph, with gusts as high as 20 mph.
Friday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 78. South wind 10 to 13 mph, with gusts as high as 22 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. West southwest wind around 7 mph becoming northwest after midnight.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. North wind 6 to 8 mph.
Saturday Night
A chance of showers. Partly cloudy, with a low around 53. North northeast wind around 6 mph.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 76. North wind 6 to 8 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:
4:26 am CDT Apr 20, 2026
Forecast Valid:
5am CDT Apr 20, 2026-6pm CDT Apr 26, 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