Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 12, 08:00 PM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

85°F

29°C

Humidity	77%
Wind Speed	S 5 mph
Barometer	29.91 in (1012.4 mb)
Dewpoint	77°F (25°C)
Visibility	10.00 mi
Heat Index	96°F (36°C)
Last update	9 Aug 7:53 pm CDT

More Information:

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

Extended Forecast for

Cahokia / St. Louis, St. Louis Downtown Airport IL

Extreme Heat Warning August 9, 08:55pm until August 12, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 9, 08:55pm until August 12, 08:00pm
NOW until 8:00pm Wed
Extreme Heat Warning
Tonight
Low: 75 °F
Mostly Clear
Monday
High: 98 °F
Hot
Monday Night
Low: 77 °F
Partly Cloudy
Tuesday
High: 98 °F
Hot
Tuesday Night
Low: 77 °F
Partly Cloudy
Wednesday
High: 95 °F
Slight Chance
T-storms
Wednesday Night
Low: 74 °F
Chance
T-storms
Thursday
High: 88 °F
Showers
Likely

Detailed Forecast

Tonight

Mostly clear, with a low around 75. South wind 6 to 8 mph.

Monday

Mostly sunny and hot, with a high near 98. Heat index values as high as 107. South wind 5 to 11 mph.

Monday Night

Partly cloudy, with a low around 77. South wind 6 to 8 mph.

Tuesday

Mostly sunny and hot, with a high near 98. Heat index values as high as 107. Southwest wind around 8 mph.

Tuesday Night

Partly cloudy, with a low around 77. Southwest wind around 8 mph.

Wednesday

A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 95.

Wednesday Night

A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.

Thursday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.

Thursday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

Friday

A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 87.

Friday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

Saturday

A 30 percent chance of showers. Partly sunny, with a high near 89.

Saturday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

Sunday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.