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. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

78°F

26°C

Humidity	40%
Wind Speed	E 10 G 20 mph
Barometer	30.14 in (1020.2 mb)
Dewpoint	52°F (11°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	25 May 11:53 am CDT

More Information:

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

Extended Forecast for

O'Fallon IL

Memorial Day
High: 81 °F
Mostly Sunny
Tonight
Low: 60 °F
Mostly Cloudy
Tuesday
High: 80 °F
Mostly Cloudy
then Slight
Chance
T-storms
Tuesday Night
Low: 65 °F
Chance
Showers
Wednesday
High: 82 °F
Chance
Showers then
Chance
T-storms
Wednesday Night
Low: 66 °F
Slight Chance
T-storms then
Slight Chance
Showers
Thursday
High: 84 °F
Partly Sunny
then Chance
T-storms
Thursday Night
Low: 67 °F
Slight Chance
T-storms then
Chance
Showers
Friday
High: 79 °F
Chance
Showers then
Chance
T-storms

Detailed Forecast

Memorial Day

Mostly sunny, with a high near 81. East wind around 9 mph.

Tonight

Mostly cloudy, with a low around 60. East wind around 5 mph becoming calm in the evening.

Tuesday

A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 80. Calm wind becoming east 5 to 7 mph in the afternoon.

Tuesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.

Wednesday

A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 50%.

Wednesday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.

Thursday

A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.

Thursday Night

A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.

Friday

A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

Saturday

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78.

Saturday Night

Mostly cloudy, with a low around 61.

Sunday

Mostly sunny, with a high near 78.