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

47°F

8°C

Humidity 52%
Wind Speed NE 10 G 17 mph
Barometer 30.34 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 1 Mar 12:35 pm CST
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 51. Northeast wind 11 to 14 mph.

    High: 51 °F

    Mostly Cloudy

  • Tonight

    Tonight: Rain, mainly after 11pm. Low around 36. East northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    Low: 36 °F

    Rain Likely
    then Rain

  • Monday

    Monday: Rain, mainly before 10am. High near 46. East northeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 46 °F

    Rain then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: A 50 percent chance of showers after midnight. Cloudy, with a low around 42. Calm wind becoming southeast around 6 mph after midnight.

    Low: 42 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 71. South southwest wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 71 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 59. South wind around 8 mph.

    Low: 59 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 73. South southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 73 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 59. South southwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 59 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 72. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 72 °F

    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 51. Northeast wind 11 to 14 mph.
Tonight
Rain, mainly after 11pm. Low around 36. East northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Monday
Rain, mainly before 10am. High near 46. East northeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Monday Night
A 50 percent chance of showers after midnight. Cloudy, with a low around 42. Calm wind becoming southeast around 6 mph after midnight.
Tuesday
A 30 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 71. South southwest wind 7 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 59. South wind around 8 mph.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 73. South southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 59. South southwest wind around 9 mph, with gusts as high as 18 mph.
Thursday
Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 72. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind 6 to 9 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 78. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 55. South southwest wind around 9 mph, with gusts as high as 18 mph.
Saturday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 67. Southwest wind 6 to 10 mph becoming northwest in the afternoon.
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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 Mar 1, 2026
Forecast Valid:
12pm CST Mar 1, 2026-6pm CST Mar 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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