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Hazardous Weather Conditions

Current conditions at

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Overcast

85°F

29°C

Humidity 72%
Wind Speed NW 8 mph
Barometer 30.03 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 17 Aug 1:15 pm CDT
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 88. North northwest wind around 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 89. Calm wind.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm. Partly sunny, with a high near 91. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 91 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Calm wind becoming north northeast around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65. Light north northeast wind.

    Low: 65 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 85. Calm wind becoming north around 6 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 88. North northwest wind around 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 89. Calm wind.
Tuesday Night
Mostly clear, with a low around 68. Calm wind.
Wednesday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm. Partly sunny, with a high near 91. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Calm wind becoming north northeast around 6 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65. Light north northeast wind.
Friday
Mostly sunny, with a high near 85. Calm wind becoming north around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 63. Light north wind.
Saturday
Sunny, with a high near 87. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 63. Calm wind.
Sunday
Sunny, with a high near 86. Calm wind becoming north northwest around 6 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:
10:31 am CDT Aug 17, 2026
Forecast Valid:
1pm 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