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.

Fog/Mist

65°F

18°C

Humidity 100%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 65°F (18°C)
Visibility 5.00 mi
Last update 3 Aug 6:15 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 84. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, sunny, with a high near 87. Light northeast wind.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Calm wind.

    High: 90 °F

    Sunny

  • Wednesday Night

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

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Calm wind becoming southwest around 5 mph.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 84. Calm wind becoming north northeast around 5 mph in the afternoon.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 62. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 87. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 63. Calm wind.
Wednesday
Sunny, with a high near 90. Calm wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
Mostly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind.
Friday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Calm wind becoming southwest around 5 mph.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Calm wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 70. Calm wind.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming south southwest 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.72°N 88.55°W
Last Update:
4:31 am CDT Aug 3, 2026
Forecast Valid:
6am CDT Aug 3, 2026-6pm CDT Aug 9, 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