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.

Overcast

53°F

12°C

Humidity 83%
Wind Speed S 12 G 17 mph
Barometer 29.94 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 17 Feb 1:15 pm CST
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 55. South wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 55 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of showers between 2am and 4am. Mostly cloudy, with a temperature rising to around 59 by 5am. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    Low: 55 °F⇑

    Mostly Cloudy
    then Slight
    Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: Partly sunny, with a high near 72. Southwest wind 8 to 16 mph, with gusts as high as 28 mph.

    High: 72 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after midnight. Partly cloudy, with a low around 56. South wind around 6 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly after noon. Partly sunny, with a high near 70. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 43. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 43 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 54. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers, mainly after noon. Mostly sunny, with a high near 48. North wind 5 to 8 mph.

    High: 48 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 55. South wind 10 to 13 mph, with gusts as high as 22 mph.
Tonight
A slight chance of showers between 2am and 4am. Mostly cloudy, with a temperature rising to around 59 by 5am. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 72. Southwest wind 8 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
A 40 percent chance of showers after midnight. Partly cloudy, with a low around 56. South wind around 6 mph.
Thursday
Showers likely, mainly after noon. Partly sunny, with a high near 70. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 43. West wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 54. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 35. Calm wind becoming north northeast around 5 mph after midnight.
Saturday
A chance of showers, mainly after noon. Mostly sunny, with a high near 48. North wind 5 to 8 mph.
Saturday Night
A chance of rain and snow showers before midnight, then a slight chance of snow showers. Partly cloudy, with a low around 28. North northwest wind 7 to 10 mph, with gusts as high as 18 mph.
Sunday
A slight chance of rain and snow showers. Mostly sunny, with a high near 40. Northwest wind 10 to 15 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 22. North northwest wind 6 to 9 mph.
Monday
Sunny, with a high near 39. North northwest wind 3 to 7 mph.
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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:
12:26 pm CST Feb 17, 2026
Forecast Valid:
1pm CST Feb 17, 2026-6pm CST Feb 23, 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