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

60°F

16°C

Humidity 95%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 24 Jun 12:55 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66. Light south wind.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers before 9am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 87 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Light south southwest wind. Chance of precipitation is 70%.

    Low: 70 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 71. South southwest wind 3 to 8 mph. Chance of precipitation is 60%.

    Low: 71 °F

    T-storms
    Likely then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 88. Southwest wind 5 to 8 mph.

    High: 88 °F

    Showers
    Likely then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 60. Calm wind.
Wednesday
Mostly sunny, with a high near 84. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 66. Light south wind.
Thursday
A slight chance of showers before 9am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Light south southwest wind. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Friday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 71. South southwest wind 3 to 8 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 88. Southwest wind 5 to 8 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 93. Light south southwest wind increasing to 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 75. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 95. South southwest wind 3 to 8 mph.
Monday Night
Clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.52°W
Last Update:
12:16 am CDT Jun 24, 2026
Forecast Valid:
1am CDT Jun 24, 2026-6pm CDT Jun 30, 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