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

73°F

23°C

Humidity 58%
Wind Speed SW 16 G 25 mph
Barometer 30.10 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 13 Apr 9:55 am CDT
Extended Forecast for

Harrisburg IL

  • Today

    Today: Mostly sunny, with a high near 83. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. South southwest wind 13 to 15 mph, with gusts as high as 29 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South southwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. South southwest wind 3 to 6 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 88. South wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 83. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 68. South southwest wind 13 to 15 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 87. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 69. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
A slight chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South southwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Thursday Night
Mostly clear, with a low around 62. South southwest wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 88. South wind 5 to 11 mph, with gusts as high as 21 mph.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. South wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. South southwest wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Northwest wind 7 to 9 mph.
Sunday
Mostly sunny, with a high near 65. Northwest wind 7 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
9:57 am CDT Apr 13, 2026
Forecast Valid:
10am CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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