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

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

67°F

19°C

Humidity	91%
Wind Speed	SW 9 mph
Barometer	30.01 in (1015.7 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Last update	19 May 7:54 am CDT

More Information:

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

Extended Forecast for

Jerseyville IL

Flood Watch May 19, 08:25am until May 19, 01:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch May 19, 08:25am until May 19, 01:00pm
NOW until 1:00pm Tue
Flood Watch
Today
High: 75 °F
Showers
Likely then
Chance
T-storms
Tonight
Low: 53 °F
Chance
T-storms
Wednesday
High: 67 °F
Partly Sunny
Wednesday Night
Low: 47 °F
Mostly Cloudy
Thursday
High: 70 °F
Mostly Cloudy
Thursday Night
Low: 54 °F
Slight Chance
Showers then
Chance
Showers
Friday
High: 69 °F
Showers
Likely
Friday Night
Low: 55 °F
Slight Chance
T-storms

Detailed Forecast

Today

Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 75. South wind 9 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 70%.

Tonight

A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 53. North wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Wednesday

Partly sunny, with a high near 67. North wind 9 to 13 mph, with gusts as high as 20 mph.

Wednesday Night

Mostly cloudy, with a low around 47. Northeast wind 7 to 9 mph.

Thursday

Mostly cloudy, with a high near 70. East wind around 10 mph.

Thursday Night

A 50 percent chance of showers, mainly after 1am. Cloudy, with a low around 54.

Friday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.

Friday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 55.

Saturday

Partly sunny, with a high near 77.

Saturday Night

A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57.

Sunday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.

Sunday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 60.

Memorial Day

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.