Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Wednesday

In the Upper Midwest, heavy to excessive rain may bring flash and urban flooding through Wednesday. Scattered severe thunderstorms capable of large hail and damaging wind gusts are possible from the central High Plains into the Upper Midwest Wednesday. Extreme heat is ongoing over the Desert Southwest through Thursday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

73°F

23°C

Humidity	98%
Wind Speed	Calm
Barometer	30.06 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Last update	8 Jul 12:35 am CDT

More Information:

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

Extended Forecast for

Johnston City IL

Overnight
Low: 70 °F
Slight Chance
T-storms and
Patchy Fog
Wednesday
High: 88 °F
Chance
T-storms
Wednesday Night
Low: 70 °F
Slight Chance
T-storms then
Mostly Clear
Thursday
High: 93 °F
Sunny then
Slight Chance
T-storms
Thursday Night
Low: 75 °F
Chance
T-storms then
Showers
Likely
Friday
High: 91 °F
Chance
T-storms then
T-storms
Likely
Friday Night
Low: 73 °F
T-storms
Likely then
Showers
Likely
Saturday
High: 89 °F
Showers
Likely
Saturday Night
Low: 71 °F
Chance
T-storms

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms before 3am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 70. Calm wind.

Wednesday

A 50 percent chance of showers and thunderstorms, mainly after 11am. Partly sunny, with a high near 88. Calm wind.

Wednesday Night

A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 70. Calm wind.

Thursday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Light south southwest wind increasing to 5 to 9 mph in the morning.

Thursday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. South wind 6 to 8 mph. Chance of precipitation is 60%.

Friday

A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 91. Southwest wind 7 to 10 mph. Chance of precipitation is 70%.

Friday Night

Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 73. Southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 70%.

Saturday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 89. West southwest wind 3 to 7 mph.

Saturday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Light southwest wind.

Sunday

A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. Calm wind becoming north 5 to 7 mph in the morning.

Sunday Night

Partly cloudy, with a low around 70. North northeast wind around 6 mph becoming calm in the evening.

Monday

Sunny, with a high near 90. Calm wind becoming east northeast 5 to 7 mph in the morning.

Monday Night

Mostly clear, with a low around 71. East northeast wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 92. Calm wind becoming east northeast around 6 mph in the afternoon.