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

75°F

24°C

Humidity 75%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 8 Sep 8:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 98. South southwest wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 71. South southwest wind 3 to 5 mph. Chance of precipitation is 80%.

    Low: 71 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 85. Calm wind becoming west 5 to 7 mph in the morning. Chance of precipitation is 90%.

    High: 85 °F

    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 91 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 72. Calm wind becoming south 5 to 8 mph after midnight.
Wednesday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 98. South southwest wind 9 to 14 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 71. South southwest wind 3 to 5 mph. Chance of precipitation is 80%.
Thursday
Showers and possibly a thunderstorm. High near 85. Calm wind becoming west 5 to 7 mph in the morning. Chance of precipitation is 90%.
Thursday Night
Mostly cloudy, with a low around 64. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light and variable wind.
Friday Night
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 66. Calm wind.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 67. Calm wind.
Sunday
A slight chance of showers. Mostly sunny, with a high near 91. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 67. Light south wind.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. South southwest wind 5 to 9 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:
6:21 am CDT Sep 8, 2026
Forecast Valid:
9am CDT Sep 8, 2026-6pm CDT Sep 14, 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