National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

64°F

18°C

Humidity 67%
Wind Speed Calm
Barometer 29.88 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 13 May 1:15 am CDT
Extended Forecast for

Harrisburg IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 62. Light south southeast wind.

    Low: 62 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 74. Light south southeast wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    High: 74 °F

    Chance
    Showers then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 62. South wind 8 to 10 mph. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 75. South wind 7 to 10 mph. Chance of precipitation is 100%.

    High: 75 °F

    Showers
    Likely then
    Showers

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 58. North northwest wind around 9 mph.

    Low: 58 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. North northwest wind 11 to 14 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. North northeast wind 5 to 10 mph.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. East northeast wind 5 to 8 mph becoming south in the afternoon.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southeast wind around 8 mph.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 62. Light south southeast wind.
Monday
A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 74. Light south southeast wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm. Low around 62. South wind 8 to 10 mph. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm. High near 75. South wind 7 to 10 mph. Chance of precipitation is 100%.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 58. North northwest wind around 9 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. North northwest wind 11 to 14 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 55. North northeast wind 5 to 10 mph.
Thursday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. East northeast wind 5 to 8 mph becoming south in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southeast wind around 8 mph.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 78. South southeast wind 9 to 15 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. West wind 9 to 13 mph, with gusts as high as 18 mph.
Saturday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 63. Southwest wind 8 to 10 mph.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. West wind 8 to 11 mph, with gusts as high as 18 mph.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Harrisburg IL
 37.74°N 88.55°W
Last Update:
11:18 pm CDT May 12, 2024
Forecast Valid:
1am CDT May 13, 2024-6pm CDT May 19, 2024
 
Forecast Discussion
 
Get as KML Get as XML

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