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

48°F

9°C

Humidity 78%
Wind Speed S 3 mph
Barometer 29.97 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 9 Mar 2:15 am CDT
Extended Forecast for

3 Miles E Simpson IL

  • Overnight

    Overnight: Mostly clear, with a low around 46. Light south southwest wind.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Patchy fog between 9am and 10am. Otherwise, partly sunny, with a high near 72. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 23 mph.

    High: 72 °F

    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 2am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 62. South southwest wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms and
    Patchy Fog

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 78. South southwest wind 5 to 11 mph, with gusts as high as 23 mph.

    High: 78 °F

    Patchy Fog
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 72. South southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 72 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 36. North northwest wind 7 to 13 mph, with gusts as high as 26 mph.

    Low: 36 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 54. North wind around 6 mph becoming west in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. Light south wind becoming south southwest 5 to 9 mph in the evening. Winds could gust as high as 22 mph.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 46. Light south southwest wind.
Monday
Patchy fog between 9am and 10am. Otherwise, partly sunny, with a high near 72. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 23 mph.
Monday Night
A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 2am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 62. South southwest wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 78. South southwest wind 5 to 11 mph, with gusts as high as 23 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. High near 72. South southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 36. North northwest wind 7 to 13 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 54. North wind around 6 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 41. Light south wind becoming south southwest 5 to 9 mph in the evening. Winds could gust as high as 22 mph.
Friday
Partly sunny, with a high near 65. Southwest wind 8 to 10 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 40. Light and variable wind.
Saturday
Sunny, with a high near 68. Light and variable wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 52. South wind around 8 mph, with gusts as high as 21 mph.
Sunday
A chance of showers. Mostly cloudy, with a high near 72. South southwest wind 9 to 15 mph, with gusts as high as 28 mph.
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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:
1:26 am CDT Mar 9, 2026
Forecast Valid:
2am CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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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