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

65°F

18°C

Humidity 26%
Wind Speed NW 10 G 17 mph
Barometer 30.24 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 6 Apr 4:55 pm CDT
Extended Forecast for

Harrisburg IL

  • Tonight

    Tonight: Mostly clear, with a low around 40. North northeast wind 3 to 8 mph.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. East northeast wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38. East wind around 6 mph.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. East southeast wind 5 to 9 mph becoming south in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. South southeast wind 6 to 8 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 75. South wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. South wind 3 to 6 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 78. Southwest wind 6 to 8 mph.

    High: 78 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Light and variable wind.

    Low: 58 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 40. North northeast wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 59. East northeast wind 8 to 13 mph, with gusts as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 38. East wind around 6 mph.
Wednesday
Mostly sunny, with a high near 74. East southeast wind 5 to 9 mph becoming south in the afternoon.
Wednesday Night
Partly cloudy, with a low around 53. South southeast wind 6 to 8 mph.
Thursday
Sunny, with a high near 75. South wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 54. South wind 3 to 6 mph.
Friday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 78. Southwest wind 6 to 8 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Light and variable wind.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Light and variable wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 61. Southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 84. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 66. South wind 9 to 13 mph, with gusts as high as 23 mph.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
4:16 pm CDT Apr 6, 2026
Forecast Valid:
5pm CDT Apr 6, 2026-6pm CDT Apr 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation