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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

68°F

20°C

Humidity 94%
Wind Speed S 12 mph
Barometer 29.77 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 13 May 5:47 pm CDT
Extended Forecast for

Johnston City IL

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 70. South wind around 11 mph, with gusts as high as 20 mph.

    High: 70 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 61. South southeast wind 7 to 10 mph. Chance of precipitation is 80%.

    Low: 61 °F

    Showers

  • Tuesday

    Tuesday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. High near 74. South southeast wind around 7 mph becoming west in the afternoon. Chance of precipitation is 80%.

    High: 74 °F

    Showers
    Likely then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Low around 59. North northwest wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 59 °F

    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76. North northwest wind around 10 mph.

    High: 76 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. North northwest wind 5 to 7 mph becoming calm.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. South southwest wind 6 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 80. South wind 7 to 11 mph.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 70. South wind around 11 mph, with gusts as high as 20 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 61. South southeast wind 7 to 10 mph. Chance of precipitation is 80%.
Tuesday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. High near 74. South southeast wind around 7 mph becoming west in the afternoon. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Low around 59. North northwest wind 6 to 8 mph. Chance of precipitation is 80%.
Wednesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76. North northwest wind around 10 mph.
Wednesday Night
Partly cloudy, with a low around 57. North northwest wind 5 to 7 mph becoming calm.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. South southwest wind 6 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80. South wind 7 to 11 mph.
Friday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60. South southwest wind 8 to 10 mph.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. Southwest wind 9 to 11 mph, with gusts as high as 18 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. South wind around 8 mph.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Southeast wind 8 to 11 mph becoming south southwest in the morning.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. South southwest wind 7 to 9 mph.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. West southwest wind 7 to 14 mph, with gusts as high as 20 mph.
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Johnston City IL
 37.82°N 88.94°W
Last Update:
2:19 pm CDT May 13, 2024
Forecast Valid:
5pm CDT May 13, 2024-6pm CDT May 20, 2024
 
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