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.

Overcast

74°F

23°C

Humidity 94%
Wind Speed SE 8 mph
Barometer 29.83 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 31 Jul 8:35 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Low around 71. Southeast wind around 8 mph becoming south southwest after midnight. Chance of precipitation is 90%.

    Low: 71 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 2pm, then a slight chance of showers between 2pm and 4pm. Mostly cloudy, with a high near 81. West southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before midnight, then a chance of showers after 2am. Mostly cloudy, with a low around 66. West southwest wind 5 to 9 mph. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers likely after 4pm. Mostly cloudy, with a high near 80. North northwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 65. North northwest wind 5 to 9 mph becoming light in the evening.

    Low: 65 °F

    Slight Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the morning.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. Light north wind.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers after 1pm. Mostly sunny, with a high near 86. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Low around 71. Southeast wind around 8 mph becoming south southwest after midnight. Chance of precipitation is 90%.
Saturday
A chance of showers and thunderstorms before 2pm, then a slight chance of showers between 2pm and 4pm. Mostly cloudy, with a high near 81. West southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers before midnight, then a chance of showers after 2am. Mostly cloudy, with a low around 66. West southwest wind 5 to 9 mph. Chance of precipitation is 50%.
Sunday
A chance of showers before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers likely after 4pm. Mostly cloudy, with a high near 80. North northwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 65. North northwest wind 5 to 9 mph becoming light in the evening.
Monday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 65. Light north wind.
Tuesday
A chance of showers after 1pm. Mostly sunny, with a high near 86. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 65. Calm wind.
Wednesday
Sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
Sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 70. Light south wind.
Friday
Sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the afternoon.
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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:
8:00 pm CDT Jul 31, 2026
Forecast Valid:
8pm CDT Jul 31, 2026-6pm CDT Aug 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