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

Hazardous Weather Outlook

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

80°F

27°C

Humidity	52%
Wind Speed	S 9 mph
Barometer	29.79 in (1008.2 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Heat Index	81°F (27°C)
Last update	15 May 6:54 pm CDT

More Information:

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

Extended Forecast for

5 Miles WSW Piasa IL

Tonight
Low: 65 °F
Mostly Cloudy
then Chance
T-storms
Saturday
High: 81 °F
T-storms
Likely
Saturday Night
Low: 62 °F
Chance
T-storms then
Partly Cloudy
Sunday
High: 87 °F
Sunny then
Sunny and
Breezy
Sunday Night
Low: 67 °F
Mostly Clear
Monday
High: 88 °F
Breezy.
Mostly Sunny
then Chance
T-storms
Monday Night
Low: 67 °F
Chance
T-storms and
Breezy
Tuesday
High: 80 °F
Chance
T-storms then
Showers
Likely
Tuesday Night
Low: 56 °F
Showers
Likely

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 65. South wind 9 to 11 mph, with gusts as high as 20 mph.

Saturday

Showers and thunderstorms likely, mainly before 11am. Mostly cloudy, with a high near 81. West wind 8 to 11 mph becoming south in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

Saturday Night

A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Southeast wind 7 to 10 mph.

Sunday

Sunny, with a high near 87. Breezy, with a south wind 11 to 20 mph, with gusts as high as 28 mph.

Sunday Night

Mostly clear, with a low around 67. South wind 15 to 17 mph, with gusts as high as 26 mph.

Monday

A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. Breezy.

Monday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Breezy.

Tuesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 70%.

Tuesday Night

Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

Wednesday

A 20 percent chance of showers after 1pm. Partly sunny, with a high near 70.

Wednesday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 51.

Thursday

Mostly sunny, with a high near 72.

Thursday Night

A 20 percent chance of showers. Partly cloudy, with a low around 53.

Friday

A 20 percent chance of showers. Mostly sunny, with a high near 78.