National Weather Service

News Headlines

Back by popular demand...one more virtual spotter class on August 5th! All ages are welcome!
NWS Soliciting Comments on Discontinuation of Haines Index and Lightning Activity Level (LAL) from Fire Weather Forecasts

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

87°F

31°C

Humidity	57%
Wind Speed	S 9 mph
Barometer	29.90 in (1012.0 mb)
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Heat Index	92°F (33°C)
Last update	16 Jun 8:53 pm CDT

More Information:

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

Extended Forecast for

3 Miles SE Mascoutah IL

Tonight
Low: 74 °F
Mostly Clear
Monday
High: 94 °F
Sunny then
Slight Chance
T-storms
Monday Night
Low: 73 °F
Mostly Cloudy
Tuesday
High: 91 °F
Mostly Sunny
then Slight
Chance
T-storms
Tuesday Night
Low: 74 °F
Partly Cloudy
Juneteenth
High: 92 °F
Partly Sunny
Wednesday Night
Low: 73 °F
Partly Cloudy
Thursday
High: 95 °F
Mostly Sunny
Thursday Night
Low: 74 °F
Mostly Clear

Detailed Forecast

Tonight

Mostly clear, with a low around 74. South wind 6 to 8 mph.

Monday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 102. South wind 7 to 16 mph, with gusts as high as 23 mph.

Monday Night

Mostly cloudy, with a low around 73. South wind 9 to 13 mph, with gusts as high as 23 mph.

Tuesday

A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. South wind 9 to 15 mph, with gusts as high as 22 mph.

Tuesday Night

Partly cloudy, with a low around 74. South wind 6 to 11 mph becoming light after midnight.

Juneteenth

Partly sunny, with a high near 92.

Wednesday Night

Partly cloudy, with a low around 73.

Thursday

Mostly sunny, with a high near 95.