Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77° N Lon: 89.01° W Elev: 486 ft.

Fair

81°F

27°C

Humidity 79%
Wind Speed S 6 mph
Barometer 30.09 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 15 Aug 6:45 am CDT
Detailed forecast for

Johnson County

Today
Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph.
Tonight
Clear. Lows in the mid 70s. Southwest winds around 5 mph.
Sunday
Mostly sunny. Hot with highs in the upper 90s. West winds around 5 mph. Highest heat index readings heat index readings up to 106 in the afternoon.
Sunday Night
A chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Humid with lows in the lower 70s. West winds around 5 mph, becoming north after midnight. Chance of rain 40 percent.
Monday
Mostly sunny. Highs around 90. North winds around 5 mph.
Monday Night
Partly cloudy. Lows in the upper 60s.
Tuesday And Tuesday Night
Mostly clear. Highs around 90. Lows in the lower 70s.
Wednesday
Mostly sunny. Highs in the mid 90s.
Wednesday Night
Partly cloudy with a chance of showers and thunderstorms. Lows around 70. Chance of rain 40 percent.
Thursday
Mostly sunny. Highs in the mid 80s.
Thursday Night
Mostly clear. Lows in the mid 60s.
Friday
Mostly sunny. Highs in the mid 80s.



Basemap Options
Click map to change the forecast location
Loading map...
702 AM CDT Sat Aug 15 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database