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

46°F

8°C

Humidity 67%
Wind Speed SE 3 mph
Barometer 30.09 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 18 Mar 8:55 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. South southwest wind 5 to 7 mph.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 72. South southwest wind around 6 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. Southwest wind 3 to 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80. West northwest wind 3 to 5 mph.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 57. South southwest wind 3 to 6 mph.

    Low: 57 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 83. South southwest wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 42. North wind 11 to 13 mph, with gusts as high as 21 mph.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 44. South southwest wind 5 to 7 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 72. South southwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 51. Calm wind.
Friday
Mostly sunny, with a high near 78. Calm wind becoming southwest 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 53. Southwest wind 3 to 5 mph.
Saturday
Sunny, with a high near 80. West northwest wind 3 to 5 mph.
Saturday Night
Clear, with a low around 57. South southwest wind 3 to 6 mph.
Sunday
Sunny, with a high near 83. South southwest wind 7 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 42. North wind 11 to 13 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 56. North northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 36. Northeast wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 61. East wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 42. East wind around 6 mph.
Wednesday
Partly sunny, with a high near 68. South wind 6 to 10 mph, with gusts as high as 18 mph.
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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:
6:15 pm CDT Mar 18, 2026
Forecast Valid:
9pm CDT Mar 18, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation