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

44°F

7°C

Humidity 92%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 2 May 12:35 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: A chance of sprinkles after 4am. Mostly cloudy, with a steady temperature around 46. Calm wind.

    Low: 46 °F

    Chance
    Sprinkles

  • Saturday

    Saturday: A chance of rain and thunderstorms before 2pm, then a slight chance of showers and thunderstorms between 2pm and 4pm. Partly sunny, with a high near 62. Calm wind becoming north 5 to 8 mph in the afternoon. Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. North wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 71. Light south southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 71 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then a chance of showers after 1am. Partly cloudy, with a low around 56. South southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. South southwest wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 71 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 50. West southwest wind 8 to 11 mph becoming north after midnight. Winds could gust as high as 21 mph.

    Low: 50 °F

    Showers

Detailed Forecast

Overnight
A chance of sprinkles after 4am. Mostly cloudy, with a steady temperature around 46. Calm wind.
Saturday
A chance of rain and thunderstorms before 2pm, then a slight chance of showers and thunderstorms between 2pm and 4pm. Partly sunny, with a high near 62. Calm wind becoming north 5 to 8 mph in the afternoon. Chance of precipitation is 30%.
Saturday Night
Mostly clear, with a low around 39. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 71. Light south southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then a chance of showers after 1am. Partly cloudy, with a low around 56. South southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. South southwest wind 8 to 16 mph, with gusts as high as 25 mph.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 50. West southwest wind 8 to 11 mph becoming north after midnight. Winds could gust as high as 21 mph.
Wednesday
A chance of showers. Partly sunny, with a high near 66. North wind around 9 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 46. North wind around 7 mph.
Thursday
Mostly sunny, with a high near 66. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 45. Northwest wind 3 to 6 mph.
Friday
Sunny, with a high near 71. West southwest wind 5 to 9 mph.
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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:
10:41 pm CDT May 1, 2026
Forecast Valid:
12am CDT May 2, 2026-6pm CDT May 8, 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