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

60°F

16°C

Humidity 56%
Wind Speed W 7 mph
Barometer 30.09 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 22 Apr 1:55 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Clear, with a low around 54. Southwest wind around 8 mph.

    Low: 54 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 55. South southwest wind 5 to 9 mph becoming light in the evening.

    Low: 55 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 82. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. South wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 77. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    High: 77 °F

    Showers
    Likely then
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Southwest wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely

  • Saturday

    Saturday: A slight chance of showers. Mostly sunny, with a high near 77. North northeast wind 5 to 7 mph.

    High: 77 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 54. Northeast wind 3 to 5 mph.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 54. Southwest wind around 8 mph.
Wednesday
Sunny, with a high near 80. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
Clear, with a low around 55. South southwest wind 5 to 9 mph becoming light in the evening.
Thursday
Sunny, with a high near 82. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Thursday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. South wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Friday
Showers and possibly a thunderstorm. High near 77. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Southwest wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 60%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 77. North northeast wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 54. Northeast wind 3 to 5 mph.
Sunday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. East wind 5 to 7 mph.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. East wind 6 to 8 mph.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 24 mph.
Monday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 55. South southwest wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 73. West northwest wind around 9 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:
11:46 pm CDT Apr 21, 2026
Forecast Valid:
2am CDT Apr 22, 2026-6pm CDT Apr 28, 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