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.

Mostly Cloudy

65°F

18°C

Humidity 63%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 26 Sep 9:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Partly sunny, with a high near 73. Light northeast wind.

    High: 73 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76. Light east northeast wind.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 62. Calm wind becoming south around 5 mph after midnight.

    Low: 62 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers, mainly after 1pm. Mostly cloudy, with a high near 82. South wind 5 to 10 mph.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 73. Light northeast wind.
Tonight
Mostly cloudy, with a low around 56. Calm wind.
Sunday
Mostly sunny, with a high near 75. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 49. Calm wind.
Monday
Sunny, with a high near 76. Light east northeast wind.
Monday Night
Mostly clear, with a low around 53. Calm wind.
Tuesday
Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 62. Calm wind becoming south around 5 mph after midnight.
Wednesday
A chance of showers, mainly after 1pm. Mostly cloudy, with a high near 82. South wind 5 to 10 mph.
Wednesday Night
A chance of showers after 1am. Mostly cloudy, with a low around 67. South southeast wind 5 to 7 mph.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South wind 9 to 13 mph, with gusts as high as 20 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 64. South wind around 6 mph becoming calm in the evening.
Friday
A chance of showers. Partly sunny, with a high near 81. South southwest wind 3 to 8 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:
8:16 am CDT Sep 26, 2026
Forecast Valid:
10am CDT Sep 26, 2026-6pm CDT Oct 2, 2026
 
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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