NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Heat Advisory until June 9, 10:00 PM CDT

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

88°F

31°C

Humidity	61%
Wind Speed	S 15 mph
Barometer	29.91 in (1012.1 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	96°F (36°C)
Last update	9 Jun 1:54 pm CDT

More Information:

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

Extended Forecast for

4 Miles NNE Saint Charles MO

Heat Advisory June 9, 02:55pm until June 9, 10:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory June 9, 02:55pm until June 9, 10:00pm
NOW until 10:00pm Tue
Heat Advisory
This Afternoon
High: 92 °F
Slight Chance
T-storms
Tonight
Low: 75 °F
Mostly Clear
Wednesday
High: 93 °F
Increasing
Clouds
Wednesday Night
Low: 75 °F
Mostly Cloudy
Thursday
High: 94 °F
Mostly Sunny
then Slight
Chance
T-storms
Thursday Night
Low: 67 °F
Showers
Friday
High: 85 °F
Sunny
Friday Night
Low: 65 °F
Mostly Clear

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 105. Southwest wind around 9 mph.

Tonight

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

Wednesday

Increasing clouds, with a high near 93. Heat index values as high as 102. Southwest wind 7 to 14 mph, with gusts as high as 23 mph.

Wednesday Night

Clear during the early evening, then becoming mostly cloudy, with a low around 75. South wind 8 to 11 mph, with gusts as high as 20 mph.

Thursday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. South wind 8 to 17 mph, with gusts as high as 29 mph.

Thursday Night

Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Low around 67. Chance of precipitation is 80%.

Friday

Sunny, with a high near 85.

Friday Night

Mostly clear, with a low around 65.

Saturday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.

Saturday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 68. Chance of precipitation is 60%.

Sunday

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.

Sunday Night

A 30 percent chance of showers. Mostly cloudy, with a low around 63.

Monday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.