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.

Overcast

58°F

14°C

Humidity 74%
Wind Speed SW 14 G 22 mph
Barometer 29.72 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 18 Feb 3:15 am CST
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: A 20 percent chance of showers before 4am. Cloudy, with a steady temperature around 56. Breezy, with a southwest wind around 21 mph, with gusts as high as 39 mph.

    Low: 56 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 72. Breezy, with a southwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 72 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. South wind around 8 mph.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 70. South southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    High: 70 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 42. West wind around 11 mph, with gusts as high as 22 mph.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 54. West wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain and snow showers before noon, then a chance of rain showers. Partly sunny, with a high near 48. North northeast wind 5 to 8 mph.

    High: 48 °F

    Slight Chance
    Rain/Snow
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of rain and snow showers before midnight. Partly cloudy, with a low around 26. North northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 26 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers before 4am. Cloudy, with a steady temperature around 56. Breezy, with a southwest wind around 21 mph, with gusts as high as 39 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 72. Breezy, with a southwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 55. South wind around 8 mph.
Thursday
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 70. South southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 42. West wind around 11 mph, with gusts as high as 22 mph.
Friday
Sunny, with a high near 54. West wind 5 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 34. Calm wind becoming north northeast around 5 mph after midnight.
Saturday
A slight chance of rain and snow showers before noon, then a chance of rain showers. Partly sunny, with a high near 48. North northeast wind 5 to 8 mph.
Saturday Night
A chance of rain and snow showers before midnight. Partly cloudy, with a low around 26. North northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 40. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 21. Northwest wind 7 to 9 mph.
Monday
Sunny, with a high near 38. North northwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 20. Light and variable wind.
Tuesday
Mostly sunny, with a high near 46. Calm wind becoming south 5 to 9 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
3:16 am CST Feb 18, 2026
Forecast Valid:
3am CST Feb 18, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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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