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

59°F

15°C

Humidity 43%
Wind Speed Calm
Barometer 29.87 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 26 Feb 3:55 pm CST
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 59. Calm wind.

    High: 59 °F

    Sunny

  • Tonight

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

    Low: 35 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 67. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 67 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Clear, with a low around 43. South southwest wind around 6 mph becoming light and variable after midnight.

    Low: 43 °F

    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 67. Light and variable wind becoming east northeast around 6 mph in the morning.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. South wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after noon. Mostly cloudy, with a high near 47. Northeast wind around 10 mph, with gusts as high as 18 mph.

    High: 47 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Rain and snow showers likely, mainly after midnight. Cloudy, with a low around 34. Northeast wind around 8 mph.

    Low: 34 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow showers before noon. Mostly cloudy, with a high near 45. East northeast wind 7 to 10 mph.

    High: 45 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 59. Calm wind.
Tonight
Patchy fog after 5am. Otherwise, clear, with a low around 35. Calm wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 67. Calm wind becoming southwest 5 to 9 mph in the morning.
Friday Night
Clear, with a low around 43. South southwest wind around 6 mph becoming light and variable after midnight.
Saturday
Mostly sunny, with a high near 67. Light and variable wind becoming east northeast around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 35. South wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph.
Sunday
A 20 percent chance of showers after noon. Mostly cloudy, with a high near 47. Northeast wind around 10 mph, with gusts as high as 18 mph.
Sunday Night
Rain and snow showers likely, mainly after midnight. Cloudy, with a low around 34. Northeast wind around 8 mph.
Monday
A chance of rain and snow showers before noon. Mostly cloudy, with a high near 45. East northeast wind 7 to 10 mph.
Monday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 33. East wind around 6 mph.
Tuesday
A chance of showers. Cloudy, with a high near 52. East wind around 7 mph becoming south southwest in the afternoon.
Tuesday Night
A chance of showers. Cloudy, with a low around 42. South wind around 6 mph.
Wednesday
A chance of showers. Cloudy, with a high near 61. South southeast wind 6 to 9 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:
3:32 pm CST Feb 26, 2026
Forecast Valid:
4pm CST Feb 26, 2026-6pm CST Mar 4, 2026
 
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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