National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Mostly Cloudy

85°F

29°C

Humidity 62%
Wind Speed NW 10 G 22 mph
Barometer 30.03 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 17 Aug 2:35 pm CDT
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 88. North northwest wind 8 to 10 mph.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Calm wind.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 67. Calm wind. Chance of precipitation is 30%.

    Low: 67 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm. Partly sunny, with a high near 87. Calm wind becoming south southeast around 5 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 67. Calm wind. Chance of precipitation is 80%.

    Low: 67 °F

    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Calm wind becoming north northeast around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 84 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 88. North northwest wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 62. North northwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 87. Calm wind.
Tuesday Night
A chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 67. Calm wind. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm. Partly sunny, with a high near 87. Calm wind becoming south southeast around 5 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 67. Calm wind. Chance of precipitation is 80%.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Calm wind becoming north northeast around 5 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 64. Calm wind.
Friday
Sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 64. Calm wind.
Saturday
Sunny, with a high near 86. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 63. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
2:11 pm CDT Aug 17, 2026
Forecast Valid:
2pm CDT Aug 17, 2026-6pm CDT Aug 23, 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