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 >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

84°F

29°C

Humidity	77%
Wind Speed	SW 6 mph
Barometer	29.91 in (1012.2 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	9 Jun 10:53 pm CDT

More Information:

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

Extended Forecast for

O'Fallon IL

Tonight
Low: 75 °F
Mostly Clear
Wednesday
High: 94 °F
Sunny
Wednesday Night
Low: 76 °F
Slight Chance
T-storms
Thursday
High: 94 °F
Sunny
Thursday Night
Low: 70 °F
Showers
Friday
High: 84 °F
Sunny
Friday Night
Low: 65 °F
Mostly Clear
Saturday
High: 86 °F
Chance
T-storms
Saturday Night
Low: 68 °F
Chance
T-storms then
Showers
Likely

Detailed Forecast

Tonight

Mostly clear, with a low around 75. Southwest wind around 7 mph.

Wednesday

Sunny, with a high near 94. Heat index values as high as 101. South wind 7 to 14 mph, with gusts as high as 21 mph.

Wednesday Night

A slight chance of showers and thunderstorms between 10pm and 1am. Increasing clouds, with a low around 76. South wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Thursday

Sunny, with a high near 94. Heat index values as high as 105. South wind 9 to 18 mph, with gusts as high as 28 mph.

Thursday Night

Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Low around 70. South wind 9 to 17 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

Friday

Sunny, with a high near 84.

Friday Night

Mostly clear, with a low around 65.

Saturday

A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 86.

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 64.

Monday

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

Monday Night

A 20 percent chance of showers. Partly cloudy, with a low around 61.

Tuesday

Mostly sunny, with a high near 80.