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

45°F

7°C

Humidity 47%
Wind Speed SE 3 mph
Barometer 30.33 in
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 29 Mar 5:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Mostly sunny, with a high near 71. Light south southeast wind becoming south southwest 11 to 16 mph in the morning. Winds could gust as high as 24 mph.

    High: 71 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 56. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Breezy, with a south southwest wind 11 to 21 mph, with gusts as high as 32 mph.

    High: 79 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. South southwest wind around 15 mph, with gusts as high as 24 mph.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 36 mph.

    High: 83 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. South southwest wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    Low: 57 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 70. West northwest wind around 11 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 55. East northeast wind around 9 mph.

    Low: 55 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 70. Southeast wind around 10 mph, with gusts as high as 18 mph.

    High: 70 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 71. Light south southeast wind becoming south southwest 11 to 16 mph in the morning. Winds could gust as high as 24 mph.
Tonight
Partly cloudy, with a low around 56. South wind 8 to 10 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a south southwest wind 11 to 21 mph, with gusts as high as 32 mph.
Monday Night
Mostly clear, with a low around 65. South southwest wind around 15 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 36 mph.
Tuesday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. South southwest wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 70. West northwest wind around 11 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 55. East northeast wind around 9 mph.
Thursday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 70. Southeast wind around 10 mph, with gusts as high as 18 mph.
Thursday Night
Showers likely. Cloudy, with a low around 53. Southwest wind around 8 mph becoming south southeast in the evening.
Friday
A chance of showers. Mostly cloudy, with a high near 76. South wind 7 to 9 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind around 8 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. South southwest wind 11 to 15 mph, with gusts as high as 22 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
3:27 am CDT Mar 29, 2026
Forecast Valid:
6am CDT Mar 29, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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