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.

Mostly Cloudy

63°F

17°C

Humidity	81%
Wind Speed	E 8 mph
Barometer	29.97 in (1014.8 mb)
Dewpoint	57°F (14°C)
Visibility	10.00 mi
Last update	22 May 2:53 am CDT

More Information:

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

Extended Forecast for

Cahokia IL

Overnight
Low: 59 °F
Mostly Cloudy
Friday
High: 70 °F
Slight Chance
Showers then
Chance
Showers
Friday Night
Low: 59 °F
Slight Chance
Showers then
Patchy Fog
Saturday
High: 82 °F
Patchy Fog
then Slight
Chance
T-storms
Saturday Night
Low: 63 °F
Showers
Likely
Sunday
High: 83 °F
Showers
Likely
Sunday Night
Low: 63 °F
Mostly Cloudy
Memorial Day
High: 85 °F
Partly Sunny
then Slight
Chance
T-storms
Monday Night
Low: 65 °F
Mostly Cloudy
then Slight
Chance
Showers

Detailed Forecast

Overnight

Mostly cloudy, with a low around 59. East wind around 6 mph.

Friday

A 50 percent chance of showers, mainly after noon. Mostly cloudy, with a high near 70. Northeast wind around 7 mph.

Friday Night

A 20 percent chance of showers before 10pm. Patchy fog after 2am. Otherwise, cloudy, with a low around 59. Northeast wind around 6 mph becoming calm in the evening.

Saturday

A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 82. Light and variable wind.

Saturday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%.

Sunday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

Sunday Night

Mostly cloudy, with a low around 63.

Memorial Day

A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85.

Monday Night

A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 65.

Tuesday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

Tuesday Night

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

Wednesday

Showers and thunderstorms likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.