Weather for St Charles, Missouri
Current Weather
Five Day Weather Forecast
Fri
H: 60°F
L: 44°F
Sat
H: 56°F
L: 44°F
Sun
H: 75°F
L: 45°F
Mon
H: 79°F
L: 61°F
Tue
H: 64°F
L: 51°F
Air Quality
Nitrogen Dioxide: 7.35 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 54 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 1:03PM CDT until May 2 at 7:00PM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 1:03 PM
Expires: Sat May 2, 2026, 1:15 AM
...The Flood Warning continues for the following rivers in Missouri...Illinois... Mississippi River at St. Louis. Mississippi River near Herculaneum. Mississippi River at Chester. ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Alton. Mississippi River at Mel Price LD. Mississippi River at Grafton. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at St. Louis. * WHEN...Until Saturday evening. * IMPACTS...At 30.0 feet, Floodwall at Lacledes Landing is closed. Also at this level, the U.S. Coast Guard may prohibit all recreational vessel traffic from just above the Chain of Rocks Canal south entry to just below the mouth of the Meramec River. * ADDITIONAL DETAILS... - At 12:00 PM CDT Thursday the stage was 29.3 feet. - Forecast...The river is expected to rise to a crest of 30.0 feet early tomorrow afternoon. - Flood stage is 30.0 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 11:54AM CDT until May 5 at 3:34AM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 11:54 AM
Expires: Sat May 2, 2026, 12:00 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 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 11:30 AM CDT Thursday the stage was 26.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Thursday was 26.8 feet. - Forecast...The river is expected to rise to a crest of 27.7 feet early tomorrow afternoon. It will then fall below flood stage late 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 11:26AM CDT until May 2 at 3:00PM CDT by NWS St Louis MO
Effective: Thu April 30, 2026, 11:26 AM
Expires: Fri May 1, 2026, 11:30 PM
...The Flood Warning is extended for the following rivers in Missouri... Missouri River at St. Charles. ...The Flood Warning continues for the following rivers in Missouri... Missouri River at Hermann. 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 afternoon. * 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 11:00 AM CDT Thursday the stage was 25.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:00 AM CDT Thursday was 25.2 feet. - Forecast...The river is expected to rise to a crest of 25.3 feet this evening. It will then fall below flood stage late tomorrow morning. - 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 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
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.05 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 79.24 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: 9.37 μg/m3
Sulphur Dioxide: 1.92 μg/m3
Ozone: 72.28 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: 14.66 μg/m3
Sulphur Dioxide: 2.77 μg/m3
Ozone: 77.76 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: 8.97 μg/m3
Sulphur Dioxide: 2.36 μg/m3
Ozone: 84.08 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: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 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