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.

Partly Cloudy

42°F

6°C

Humidity 87%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 10 Jan 3:55 am CST
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly between 10am and noon. Cloudy, then gradual clearing during the afternoon, with a temperature rising to near 48 by 10am, then falling to around 42 during the remainder of the day. Light northwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 23 mph.

    High: 48 °F⇓

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers between 9pm and midnight. Mostly clear, with a low around 26. West northwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 39. West northwest wind 8 to 13 mph becoming light in the afternoon. Winds could gust as high as 24 mph.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 24 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. West southwest wind 6 to 10 mph.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 44. Calm wind.
Saturday
A 30 percent chance of showers, mainly between 10am and noon. Cloudy, then gradual clearing during the afternoon, with a temperature rising to near 48 by 10am, then falling to around 42 during the remainder of the day. Light northwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 23 mph.
Saturday Night
A slight chance of showers between 9pm and midnight. Mostly clear, with a low around 26. West northwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 39. West northwest wind 8 to 13 mph becoming light in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly clear, with a low around 24. Calm wind becoming south southwest around 5 mph after midnight.
Monday
Sunny, with a high near 49. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 35. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Tuesday
Mostly sunny, with a high near 57. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 40. West southwest wind 6 to 10 mph.
Wednesday
A slight chance of showers after noon. Mostly cloudy, with a high near 47. Northwest wind 6 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 22. North wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 37. North northwest wind 5 to 8 mph becoming light and variable in the afternoon.
Thursday Night
Mostly cloudy, with a low around 25. South southwest wind 3 to 7 mph.
Friday
Partly sunny, with a high near 46. West southwest wind 7 to 11 mph, with gusts as high as 18 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 88.55°W
Last Update:
3:16 am CST Jan 10, 2026
Forecast Valid:
4am CST Jan 10, 2026-6pm CST Jan 16, 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