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

36°F

2°C

Humidity 89%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 27 Feb 12:15 am CST
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Patchy fog after 5am. Otherwise, clear, with a low around 35. Calm wind.

    Low: 35 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 69. Light south southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 69 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Clear, with a low around 42. South wind 5 to 7 mph becoming west after midnight.

    Low: 42 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 68. Light and variable wind becoming southeast around 6 mph in the morning.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36. South southwest wind 6 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 51. Northeast wind around 10 mph, with gusts as high as 18 mph.

    High: 51 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Showers likely, mainly after midnight. Cloudy, with a low around 36. East northeast wind around 9 mph. Chance of precipitation is 60%.

    Low: 36 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers before noon. Cloudy, with a high near 46. East northeast wind 7 to 9 mph.

    High: 46 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 38. East northeast wind around 6 mph becoming south southeast after midnight.

    Low: 38 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, clear, with a low around 35. Calm wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 69. Light south southwest wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Clear, with a low around 42. South wind 5 to 7 mph becoming west after midnight.
Saturday
Sunny, with a high near 68. Light and variable wind becoming southeast around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 36. South southwest wind 6 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly cloudy, with a high near 51. Northeast wind around 10 mph, with gusts as high as 18 mph.
Sunday Night
Showers likely, mainly after midnight. Cloudy, with a low around 36. East northeast wind around 9 mph. Chance of precipitation is 60%.
Monday
A chance of showers before noon. Cloudy, with a high near 46. East northeast wind 7 to 9 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 38. East northeast wind around 6 mph becoming south southeast after midnight.
Tuesday
Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 60. South southeast wind 6 to 9 mph becoming southwest in the afternoon.
Tuesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 48. West southwest wind around 6 mph becoming east in the evening.
Wednesday
A chance of showers and thunderstorms. Cloudy, with a high near 67. South wind 6 to 9 mph.
Wednesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 56. South wind 7 to 11 mph, with gusts as high as 21 mph.
Thursday
A chance of showers. Cloudy, with a high near 70. South southwest wind 8 to 14 mph, with gusts as high as 23 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
12:17 am CST Feb 27, 2026
Forecast Valid:
12am CST Feb 27, 2026-6pm CST Mar 5, 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