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

72°F

22°C

Humidity 66%
Wind Speed SW 16 G 20 mph
Barometer 29.95 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 15 Apr 9:10 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 86. South southwest wind 15 to 18 mph, with gusts as high as 28 mph.

    High: 86 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 81. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    High: 81 °F

    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 61. Southwest wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 87 °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 62. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Partly cloudy, with a low around 40. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 64. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 64 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 86. South southwest wind 15 to 18 mph, with gusts as high as 28 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 81. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 61. Southwest wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. South wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 40. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 64. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 40. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 70. South southeast wind 3 to 7 mph.
Monday Night
Partly cloudy, with a low around 48. South wind 3 to 5 mph.
Tuesday
Sunny, with a high near 77. South southwest wind 6 to 11 mph, with gusts as high as 18 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 am CDT Apr 15, 2026
Forecast Valid:
10am CDT Apr 15, 2026-6pm CDT Apr 21, 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