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.

Partly Cloudy

85°F

29°C

Humidity 49%
Wind Speed N 8 mph
Barometer 29.99 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 27 Aug 4:55 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70. Light south wind.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. South southwest wind 5 to 9 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming north northeast around 6 mph in the afternoon.
Friday Night
Clear, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 89. Light and variable wind.
Saturday Night
Mostly clear, with a low around 65. Calm wind.
Sunday
Sunny, with a high near 94. Calm wind becoming south southwest 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 70. Light south wind.
Monday
Sunny, with a high near 95. South southwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 73. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 96. Calm wind becoming southwest 5 to 8 mph in the morning.
Tuesday Night
Mostly clear, with a low around 74. South wind around 5 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 8 mph in the morning.
Wednesday Night
Mostly clear, with a low around 75. South southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 97. 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:
4:16 pm CDT Aug 27, 2026
Forecast Valid:
5pm CDT Aug 27, 2026-6pm CDT Sep 3, 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