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.

Partly Cloudy

71°F

22°C

Humidity 54%
Wind Speed S 10 mph
Barometer 30.17 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 12 Apr 8:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Mostly sunny, with a high near 84. South southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 67. South wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 67 °F

    Mostly Cloudy
    then Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 83. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 87. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of thunderstorms before 7pm, then a slight chance of showers after 1am. Mostly cloudy, with a low around 69. South southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 85. South southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 66 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 84. South southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 67. South wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 83. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Tuesday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 87. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of thunderstorms before 7pm, then a slight chance of showers after 1am. Mostly cloudy, with a low around 69. South southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 85. South southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Thursday Night
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 62. South southwest wind 3 to 5 mph.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Friday Night
A chance of showers. Partly cloudy, with a low around 65. South wind 7 to 9 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
8:01 am CDT Apr 12, 2026
Forecast Valid:
8am CDT Apr 12, 2026-6pm CDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation