National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Partly Cloudy

50°F

10°C

Humidity 86%
Wind Speed N 6 mph
Barometer 30.40 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 17 Oct 1:15 am CDT
Extended Forecast for

Harrisburg IL

Frost Advisory October 17, 09:00pm until October 18, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 41. North wind around 11 mph, with gusts as high as 21 mph.

    Low: 41 °F

    Mostly Clear

  • Saturday

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

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 3am. Otherwise, clear, with a low around 33. Calm wind.

    Low: 33 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 67 °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

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 41. North wind around 11 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 60. North northeast wind 8 to 11 mph.
Saturday Night
Areas of frost after 3am. Otherwise, clear, with a low around 33. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 67. 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.
Thursday Night
Mostly clear, with a low around 47. Calm wind.
Friday
Sunny, with a high near 80. Calm wind becoming east northeast around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
1:11 am CDT Oct 17, 2026
Forecast Valid:
1am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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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