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.

Overcast

56°F

13°C

Humidity 60%
Wind Speed NW 14 G 20 mph
Barometer 30.21 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 16 Oct 2:15 pm CDT
Extended Forecast for

Harrisburg IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 56. Northwest wind around 18 mph, with gusts as high as 25 mph.

    High: 56 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. North wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 60. North northeast wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 4am. Otherwise, clear, with a low around 34. Calm wind.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 66. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 66 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37. Calm wind.

    Low: 37 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 73 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 56. Northwest wind around 18 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 41. North wind 11 to 13 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 60. North northeast wind 8 to 11 mph, with gusts as high as 18 mph.
Saturday Night
Areas of frost after 4am. Otherwise, clear, with a low around 34. Calm wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 66. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Clear, with a low around 37. Calm wind.
Monday
Sunny, with a high near 70. Light and variable wind.
Monday Night
Mostly clear, with a low around 40. Calm wind.
Tuesday
Sunny, with a high near 73. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 41. Calm wind.
Wednesday
Sunny, with a high near 76. Calm wind becoming east northeast around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 43. Calm wind.
Thursday
Sunny, with a high near 78. Light northeast wind.
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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:
1:46 pm CDT Oct 16, 2026
Forecast Valid:
2pm CDT Oct 16, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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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