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

60°F

16°C

Humidity 96%
Wind Speed Calm
Barometer 30.12 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 23 Jul 3:15 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Calm wind becoming northeast 5 to 7 mph in the morning.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61. Light northeast wind.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 82. Light east northeast wind.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 87. Calm wind becoming south around 5 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. Calm wind.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 61. Calm wind.
Thursday
Sunny, with a high near 80. Calm wind becoming northeast 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 61. Light northeast wind.
Friday
Partly sunny, with a high near 82. Light east northeast wind.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Calm wind.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 87. Calm wind becoming south around 5 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 71. Calm wind.
Sunday
Mostly sunny, with a high near 93. Calm wind.
Sunday Night
Mostly clear, with a low around 73. Calm wind.
Monday
Sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 9 mph in the morning.
Monday Night
Mostly clear, with a low around 77. South southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 96. West northwest wind 5 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 73. North wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 92. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.72°N 88.58°W
Last Update:
1:26 am CDT Jul 23, 2026
Forecast Valid:
3am CDT Jul 23, 2026-6pm CDT Jul 29, 2026
 
Forecast Discussion
 
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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