National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Fair

76°F

24°C

Humidity 57%
Wind Speed S 9 mph
Barometer 29.91 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 15 Apr 7:35 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 64. South southwest wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Slight Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 81. Southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 59. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 61. South wind around 10 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 70%.

    High: 72 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 41. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 41 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 65. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41. Northwest wind around 5 mph becoming light and variable in the evening.

    Low: 41 °F

    Clear

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 64. South southwest wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday
Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 81. Southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 59. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 61. South wind around 10 mph, with gusts as high as 21 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 70%.
Saturday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 41. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 65. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 41. Northwest wind around 5 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 71. South wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 50. South wind around 6 mph.
Tuesday
Sunny, with a high near 77. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 54. South southwest wind around 7 mph.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 79. Southwest wind 6 to 10 mph, with gusts as high as 20 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:
6:36 pm CDT Apr 15, 2026
Forecast Valid:
7pm CDT Apr 15, 2026-6pm CDT Apr 22, 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