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

76°F

24°C

Humidity 57%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 24 Jul 11:15 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Partly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Calm wind becoming south around 5 mph. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 94. Calm wind.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South southwest wind 6 to 8 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. West wind 5 to 9 mph.

    High: 97 °F

    Hot

Detailed Forecast

Today
Partly sunny, with a high near 82. Calm wind.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Calm wind becoming south around 5 mph. Chance of precipitation is 50%.
Saturday Night
Partly cloudy, with a low around 71. Calm wind.
Sunday
Mostly sunny, with a high near 94. Calm wind.
Sunday Night
Mostly clear, with a low around 74. Calm wind.
Monday
Sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 78. South southwest wind 6 to 8 mph.
Tuesday
Sunny and hot, with a high near 97. West wind 5 to 9 mph.
Tuesday Night
Mostly clear, with a low around 74. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. Calm wind becoming north 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 70. North northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 92. Calm wind becoming northeast around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
7:21 am CDT Jul 24, 2026
Forecast Valid:
11am CDT Jul 24, 2026-6pm CDT Jul 30, 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