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.

Overcast

64°F

18°C

Humidity 87%
Wind Speed N 3 mph
Barometer 30.07 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 22 Sep 4:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Partly sunny, with a high near 77. North northeast wind 6 to 9 mph.

    High: 77 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. North wind 5 to 9 mph becoming light north northeast after midnight.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 76. North wind 5 to 9 mph.

    High: 76 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy during the early evening, then becoming mostly clear, with a low around 57. North wind 5 to 7 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 78. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 78 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. Light northeast wind.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79. Calm wind becoming east northeast 5 to 8 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 78. Calm wind becoming east around 5 mph in the morning.

    High: 78 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 77. North northeast wind 6 to 9 mph.
Tonight
Mostly cloudy, with a low around 59. North wind 5 to 9 mph becoming light north northeast after midnight.
Wednesday
Increasing clouds, with a high near 76. North wind 5 to 9 mph.
Wednesday Night
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 57. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 78. Calm wind becoming north northeast 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 58. Light northeast wind.
Friday
Mostly sunny, with a high near 79. Calm wind becoming east northeast 5 to 8 mph in the morning.
Friday Night
Partly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 78. Calm wind becoming east around 5 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 54. Calm wind.
Sunday
Partly sunny, with a high near 81. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 57. Calm wind.
Monday
Mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.72°N 88.58°W
Last Update:
2:11 am CDT Sep 22, 2026
Forecast Valid:
5am CDT Sep 22, 2026-6pm CDT Sep 28, 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