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

63°F

17°C

Humidity 88%
Wind Speed NE 9 mph
Barometer 30.17 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Sep 10:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Mostly cloudy, with a high near 73. Northeast wind 7 to 9 mph.

    High: 73 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. North northeast wind 5 to 9 mph becoming light after midnight.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 76. North wind 5 to 9 mph.

    High: 76 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 57. North wind 5 to 8 mph becoming calm after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 79. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 79 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. North northeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 80. Calm wind becoming northeast 5 to 7 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. Northeast wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79. Calm wind becoming east around 5 mph in the afternoon.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 73. Northeast wind 7 to 9 mph.
Tonight
Mostly cloudy, with a low around 58. North northeast wind 5 to 9 mph becoming light after midnight.
Wednesday
Mostly cloudy, with a high near 76. North wind 5 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 57. North wind 5 to 8 mph becoming calm after midnight.
Thursday
Partly sunny, with a high near 79. Calm wind becoming north northeast 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 58. North northeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 80. Calm wind becoming northeast 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 54. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 79. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 54. Calm wind.
Sunday
Mostly sunny, with a high near 81. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 55. Calm wind.
Monday
Mostly sunny, with a high near 85. Calm wind becoming east southeast around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
10:51 am CDT Sep 22, 2026
Forecast Valid:
11am 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