Storm Moving from Western into Central U.S. through Wednesday

A storm system moving over the Rockies Wednesday will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Moderate snow is expected from northwestern Wyoming into southern Montana. Read More >

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

55°F

13°C

Humidity	96%
Wind Speed	Calm
Barometer	30.18 in
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	15 Oct 2:55 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Simpson IL

Overnight
Low: 57 °F
Clear
Wednesday
High: 82 °F
Patchy Fog
then Sunny
Wednesday Night
Low: 57 °F
Clear
Thursday
High: 78 °F
Sunny
Thursday Night
Low: 54 °F
Partly Cloudy
Friday
High: 79 °F
Partly Sunny
Friday Night
Low: 61 °F
Mostly Clear
Saturday
High: 77 °F
Chance
T-storms then
Showers
Likely
Saturday Night
Low: 51 °F
Showers

Detailed Forecast

Overnight

Clear, with a steady temperature around 57. Calm wind.

Wednesday

Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.

Wednesday Night

Clear, with a low around 57. Calm wind.

Thursday

Sunny, with a high near 78. Calm wind becoming east around 6 mph in the morning.

Thursday Night

Partly cloudy, with a low around 54. Light east wind.

Friday

Partly sunny, with a high near 79. Calm wind becoming southeast around 5 mph in the morning.

Friday Night

Mostly clear, with a low around 61. Calm wind becoming south around 6 mph after midnight.

Saturday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 77. South wind 6 to 11 mph, with gusts as high as 21 mph.

Saturday Night

Showers and possibly a thunderstorm before 1am, then showers likely. Mostly cloudy, with a low around 51. South southwest wind around 7 mph becoming west northwest after midnight.

Sunday

A chance of showers before 1pm. Mostly sunny, with a high near 67. West northwest wind 8 to 10 mph, with gusts as high as 20 mph.

Sunday Night

Clear, with a low around 43. West northwest wind around 5 mph becoming calm in the evening.

Monday

Sunny, with a high near 72. South southwest wind 3 to 8 mph.

Monday Night

A slight chance of showers. Mostly clear, with a low around 50. South wind 3 to 6 mph.

Tuesday

A slight chance of showers. Sunny, with a high near 74. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.