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

21°F

-6°C

Humidity 90%
Wind Speed Calm
Barometer 30.45 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 12 Jan 2:35 am CST
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Clear, with a low around 23. South southwest wind 3 to 6 mph.

    Low: 23 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 50. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 34. South southwest wind 6 to 9 mph.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 58. Southwest wind 9 to 15 mph, with gusts as high as 23 mph.

    High: 58 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 41. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 46. Northwest wind 6 to 16 mph, with gusts as high as 25 mph.

    High: 46 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 18. North northwest wind 13 to 15 mph, with gusts as high as 24 mph.

    Low: 18 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 32. Northwest wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 32 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22. Light and variable wind becoming south southwest 5 to 9 mph in the evening.

    Low: 22 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 23. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 50. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 34. South southwest wind 6 to 9 mph.
Tuesday
Sunny, with a high near 58. Southwest wind 9 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 41. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 46. Northwest wind 6 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 18. North northwest wind 13 to 15 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 32. Northwest wind 5 to 11 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 22. Light and variable wind becoming south southwest 5 to 9 mph in the evening.
Friday
Partly sunny, with a high near 43. West southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 22. West southwest wind 6 to 8 mph.
Saturday
Partly sunny, with a high near 35. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 12. West northwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 29. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
1:17 am CST Jan 12, 2026
Forecast Valid:
2am CST Jan 12, 2026-6pm CST Jan 18, 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