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

68°F

20°C

Humidity 68%
Wind Speed SW 6 mph
Barometer 29.99 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 1 Apr 12:55 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Partly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Partly sunny, with a high near 83. Southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. South wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Breezy, with a south wind 15 to 22 mph, with gusts as high as 31 mph.

    High: 81 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 65. South southwest wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Friday

    Friday: Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 61 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

    High: 72 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 40. Northwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 22 mph.
Wednesday
A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Partly sunny, with a high near 83. Southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 67. South wind 8 to 13 mph, with gusts as high as 23 mph.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Breezy, with a south wind 15 to 22 mph, with gusts as high as 31 mph.
Thursday Night
Showers and possibly a thunderstorm. Low around 65. South southwest wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Friday
Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 40. Northwest wind around 10 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 56. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 36. North wind 3 to 8 mph.
Monday
Sunny, with a high near 62. Northeast wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 40. Light and variable wind.
Tuesday
Sunny, with a high near 69. Light and variable wind becoming west 5 to 7 mph in the morning.
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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:
6:26 pm CDT Mar 31, 2026
Forecast Valid:
1am CDT Apr 1, 2026-6pm CDT Apr 7, 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