Weather for St Charles, Missouri
Current Weather
Five Day Weather Forecast
Fri
H: 64°F
L: 44°F
Sat
H: 58°F
L: 43°F
Sun
H: 76°F
L: 46°F
Mon
H: 77°F
L: 60°F
Tue
H: 60°F
L: 50°F
Air Quality
Nitrogen Dioxide: 12.05 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 81 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:54 PM
Daylight: 13 hrs 50 mins
Moon Transit: 12:31 AM
Moonset: 5:38 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:01 AM - 2:31 AM12:19 AM - 2:49 PM
Minor Periods
7:50 PM - 9:20 PM5:08 AM - 6:38 AM
Action Rating: 4 out of 5
Flood Warning issued April 30 at 9:21PM CDT until May 4 at 10:00PM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 9:21 PM
Expires: Sat May 2, 2026, 9:30 AM
...The Flood Warning continues for the following rivers in Missouri... Meramec River near Arnold. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Meramec River near Arnold. * WHEN...Until Monday evening. * IMPACTS...At 27.0 feet, Meramec Bottom Road between Wells Road and Kerth Road begins flooding near this height. * ADDITIONAL DETAILS... - At 9:00 PM CDT Thursday the stage was 27.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Thursday was 27.2 feet. - Forecast...The river is expected to rise to a crest of 27.5 feet early tomorrow afternoon. It will then fall below flood stage Sunday afternoon. - Flood stage is 24.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued April 30 at 9:14PM CDT until May 2 at 9:00AM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 9:14 PM
Expires: Sat May 2, 2026, 9:00 AM
...The Flood Warning continues for the following rivers in Missouri... Missouri River at St. Charles. Missouri River at Hermann. ...The Flood Warning is extended for the following rivers in Missouri... Missouri River near Chamois. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Missouri River at St. Charles. * WHEN...Until Saturday morning. * IMPACTS...At 25.0 feet, Downstream near this stage, Missouri Route H at Island Road and agricultural bottomland may begin flooding, depending on Mississippi River flow and backwater. * ADDITIONAL DETAILS... - At 9:00 PM CDT Thursday the stage was 25.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Thursday was 25.2 feet. - Forecast...The river is expected to fall below flood stage late tonight and continue falling to 16.2 feet Tuesday evening. - Flood stage is 25.0 feet.
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued May 1 at 1:21PM CDT until May 5 at 12:00AM CDT by NWS St Louis MO
Effective: Fri May 1, 2026, 1:21 PM
Expires: Sun May 3, 2026, 1:30 AM
...The Flood Warning is extended for the following rivers in Missouri... Meramec River near Arnold. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Meramec River near Arnold. * WHEN...Until late Monday night. * IMPACTS...At 27.0 feet, Meramec Bottom Road between Wells Road and Kerth Road begins flooding near this height. * ADDITIONAL DETAILS... - At 1:00 PM CDT Friday the stage was 27.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:00 PM CDT Friday was 27.4 feet. - Forecast...The river is expected to crest near 27.3 feet this afternoon and slowly fall into the evening. It will then fall below flood stage Sunday evening. - Flood stage is 24.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued April 30 at 9:26PM CDT until May 5 at 1:00AM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 9:26 PM
Expires: Sat May 2, 2026, 9:30 AM
...The Flood Warning continues for the following rivers in Missouri...Illinois... Mississippi River near Herculaneum. Mississippi River at Chester. Mississippi River at Alton. Mississippi River at Grafton. Mississippi River at Clarksville. Mississippi River at Louisiana. ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Mel Price LD. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. ...The Flood Warning is cancelled for the following rivers in Missouri...Illinois... Mississippi River at St. Louis. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Mel Price LD. * WHEN...Until late Monday night. * IMPACTS...At 24.0 feet, Alta Villa Road off of Highway 94 north of West Alton is closed within a foot of this height. * ADDITIONAL DETAILS... - At 9:00 PM CDT Thursday the stage was 24.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Thursday was 24.3 feet. - Forecast...The river is expected to rise to a crest of 24.3 feet just after midnight tonight. It will then fall below flood stage Sunday evening. - Flood stage is 21.0 feet.
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued April 30 at 9:26PM CDT until May 3 at 7:00AM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 9:26 PM
Expires: Sat May 2, 2026, 9:30 AM
...The Flood Warning continues for the following rivers in Missouri...Illinois... Mississippi River near Herculaneum. Mississippi River at Chester. Mississippi River at Alton. Mississippi River at Grafton. Mississippi River at Clarksville. Mississippi River at Louisiana. ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Mel Price LD. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. ...The Flood Warning is cancelled for the following rivers in Missouri...Illinois... Mississippi River at St. Louis. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Alton. * WHEN...Until Sunday morning. * IMPACTS...At 21.7 feet, At this level, Highway 94 and the east end of Harbor Point Road off of Missouri Highway 94 north of West Alton begin flooding. Also, the access road the Lincoln Shields recreation area off of U.S. Highway 367 just west of the Clark bridge begins flooding. * ADDITIONAL DETAILS... - At 9:00 PM CDT Thursday the stage was 21.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Thursday was 21.5 feet. - Forecast...The river is expected to rise to a crest of 21.6 feet just after midnight tonight. It will then fall below flood stage early Saturday morning. - Flood stage is 21.0 feet.
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.15 μg/m3
Sulphur Dioxide: 1.88 μg/m3
Ozone: 80.16 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:54 PM
Daylight: 13 hrs 50 mins
Moon Transit: 12:31 AM
Moonset: 5:38 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:01 AM - 2:31 AM12:19 AM - 2:49 PM
Minor Periods
7:50 PM - 9:20 PM5:08 AM - 6:38 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 10.15 μg/m3
Sulphur Dioxide: 1.97 μg/m3
Ozone: 71.2 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:55 PM
Daylight: 13 hrs 52 mins
Moon Transit: 1:16 AM
Moonset: 6:08 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:46 AM - 3:16 AM1:06 PM - 3:36 PM
Minor Periods
8:52 PM - 10:22 PM5:38 AM - 7:08 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 12.55 μg/m3
Sulphur Dioxide: 2.21 μg/m3
Ozone: 77.36 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:56 PM
Daylight: 13 hrs 54 mins
Moon Transit: 2:04 AM
Moonset: 6:43 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:34 AM - 4:04 AM1:55 PM - 4:25 PM
Minor Periods
9:53 PM - 11:23 PM6:13 AM - 7:43 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 9.79 μg/m3
Sulphur Dioxide: 2.47 μg/m3
Ozone: 88.52 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:57 PM
Daylight: 13 hrs 57 mins
Moon Transit: 2:54 AM
Moonset: 7:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%
Best Times for Fishing or Hunting
Major Periods
2:24 AM - 4:54 AM2:46 PM - 5:16 PM
Minor Periods
12:00 AM - 12:00 AM6:54 AM - 8:24 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 9.02 μg/m3
Sulphur Dioxide: 2.29 μg/m3
Ozone: 89 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:58 PM
Daylight: 13 hrs 59 mins
Moon Transit: 3:45 AM
Moonset: 8:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%
Best Times for Fishing or Hunting
Major Periods
3:15 AM - 5:45 AM3:37 PM - 6:07 PM
Minor Periods
7:43 AM - 9:13 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5