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.

Overcast

75°F

24°C

Humidity 100%
Wind Speed NW 6 mph
Barometer 30.03 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 17 Aug 8:55 am CDT
Extended Forecast for

3 Miles E Simpson IL

  • Today

    Today: Mostly sunny, with a high near 88. North northwest wind 6 to 8 mph.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 66. North northwest wind around 6 mph becoming calm in the evening.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 91. Calm wind becoming south around 6 mph. Chance of precipitation is 60%.

    High: 91 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 69. Calm wind. Chance of precipitation is 70%.

    Low: 69 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 86. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 88. North northwest wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 66. North northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 89. Calm wind.
Tuesday Night
Mostly clear, with a low around 68. Calm wind.
Wednesday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 91. Calm wind becoming south around 6 mph. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 69. Calm wind. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Calm wind becoming east northeast around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Calm wind.
Friday
Mostly sunny, with a high near 86. Calm wind becoming north northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 64. Calm wind.
Saturday
Sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. Calm wind.
Sunday
Sunny, with a high near 86. Calm wind becoming north northwest around 6 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Simpson IL
 37.46°N 88.71°W
Last Update:
6:46 am CDT Aug 17, 2026
Forecast Valid:
9am CDT Aug 17, 2026-6pm CDT Aug 23, 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