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

38°F

3°C

Humidity 72%
Wind Speed Calm
Barometer 30.39 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 24 Mar 12:55 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 37. Calm wind becoming east northeast around 6 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63. East wind 5 to 7 mph.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45. East wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. South southwest wind 11 to 16 mph, with gusts as high as 25 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 46. South southwest wind around 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

    Low: 46 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 57. North wind around 15 mph, with gusts as high as 24 mph.

    High: 57 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 32. North wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. Calm wind becoming east northeast around 6 mph.
Tuesday
Mostly sunny, with a high near 63. East wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 45. East wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 74. Calm wind becoming south southwest 5 to 8 mph in the morning.
Wednesday Night
Mostly clear, with a low around 61. South wind 6 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 85. South southwest wind 11 to 16 mph, with gusts as high as 25 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 46. South southwest wind around 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 57. North wind around 15 mph, with gusts as high as 24 mph.
Friday Night
Mostly clear, with a low around 32. North wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 57. Northeast wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 37. Light east wind.
Sunday
Partly sunny, with a high near 67. Light and variable wind becoming south 5 to 8 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 50. South wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 75. South southwest wind 7 to 11 mph, with gusts as high as 20 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:
1:26 am CDT Mar 24, 2026
Forecast Valid:
1am CDT Mar 24, 2026-6pm CDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

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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