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

37°F

3°C

Humidity 44%
Wind Speed W 7 mph
Barometer 30.54 in
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 11 Jan 3:55 pm CST
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Sunny, with a steady temperature around 36. West northwest wind 3 to 5 mph.

    High: 36 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 23. Calm wind becoming south southwest around 6 mph after midnight.

    Low: 23 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 49. Southwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. South southwest wind 6 to 8 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 41. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 41 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. Northwest wind 7 to 16 mph, with gusts as high as 26 mph.

    High: 45 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. North northwest wind 11 to 15 mph, with gusts as high as 26 mph.

    Low: 19 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 33. North northwest wind 5 to 11 mph, with gusts as high as 22 mph.

    High: 33 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a steady temperature around 36. West northwest wind 3 to 5 mph.
Tonight
Clear, with a low around 23. Calm wind becoming south southwest around 6 mph after midnight.
Monday
Sunny, with a high near 49. Southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 34. South southwest wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 57. Southwest wind 9 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 41. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. Northwest wind 7 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly cloudy, with a low around 19. North northwest wind 11 to 15 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 33. North northwest wind 5 to 11 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 24. South southwest wind 3 to 7 mph.
Friday
Partly sunny, with a high near 43. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 25. West wind 5 to 7 mph.
Saturday
Mostly cloudy, with a high near 35. West northwest wind 7 to 11 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.72°N 88.55°W
Last Update:
3:17 pm CST Jan 11, 2026
Forecast Valid:
4pm CST Jan 11, 2026-6pm CST Jan 17, 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