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.

Rain

61°F

16°C

Humidity 99%
Wind Speed Calm
Barometer 29.86 in
Dewpoint 60°F (16°C)
Visibility 5.00 mi
Last update 18 Apr 6:35 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Showers and thunderstorms, mainly before 3pm. Temperature rising to near 64 by 8am, then falling to around 55 during the remainder of the day. North northwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    High: 64 °F⇓

    Showers then
    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 39. North northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 39 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 69. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. West northwest wind around 6 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67. Light and variable wind.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 49. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 49 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Southwest wind 6 to 8 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. Southwest wind 5 to 9 mph.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Showers and thunderstorms, mainly before 3pm. Temperature rising to near 64 by 8am, then falling to around 55 during the remainder of the day. North northwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 39. North northwest wind 5 to 9 mph becoming calm after midnight.
Sunday
Sunny, with a high near 69. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Mostly clear, with a low around 41. West northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 67. Light and variable wind.
Monday Night
Clear, with a low around 49. Calm wind becoming south southeast around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 79. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 56. Southwest wind 6 to 8 mph.
Wednesday
Sunny, with a high near 82. Southwest wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 59. South southwest wind 3 to 5 mph.
Thursday
Sunny, with a high near 84. South southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers. Partly cloudy, with a low around 63. South wind around 10 mph, with gusts as high as 18 mph.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
5:46 am CDT Apr 18, 2026
Forecast Valid:
6am CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
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Additional Resources

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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