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.

Light Rain

45°F

7°C

Humidity 94%
Wind Speed NE 6 mph
Barometer 29.84 in
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill42°F (6°C)
Last update 15 Feb 5:55 am CST
Extended Forecast for

Harrisburg IL

  • Today

    Today: Rain, mainly before 9am. High near 55. North northeast wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    High: 55 °F

    Rain then
    Partly Sunny

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly clear, with a low around 35. North wind around 6 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Areas of fog before 8am. Otherwise, mostly sunny, with a high near 63. Calm wind becoming south around 6 mph in the afternoon.

    High: 63 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind 3 to 6 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65. South wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 65 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 59. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 33 mph.

    Low: 59 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. West southwest wind 9 to 18 mph, with gusts as high as 31 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49. Southwest wind 5 to 8 mph.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers after noon. Mostly sunny, with a high near 72. South southwest wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 72 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Rain, mainly before 9am. High near 55. North northeast wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 35. North wind around 6 mph becoming calm in the evening.
Washington's Birthday
Areas of fog before 8am. Otherwise, mostly sunny, with a high near 63. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 42. South wind 3 to 6 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 6 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 59. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 33 mph.
Wednesday
Mostly sunny, with a high near 73. West southwest wind 9 to 18 mph, with gusts as high as 31 mph.
Wednesday Night
Partly cloudy, with a low around 49. Southwest wind 5 to 8 mph.
Thursday
A chance of showers after noon. Mostly sunny, with a high near 72. South southwest wind 5 to 14 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers, mainly before midnight. Partly cloudy, with a low around 46. West wind 8 to 11 mph, with gusts as high as 20 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 58. West wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 33. West northwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 51. West northwest wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.58°W
Last Update:
3:21 am CST Feb 15, 2026
Forecast Valid:
6am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation