Weather for St Charles, Missouri
Current Weather
Five Day Weather Forecast
Wed
H: 96°F
L: 63°F
Thu
H: 78°F
L: 64°F
Fri
H: 81°F
L: 62°F
Sat
H: 86°F
L: 65°F
Sun
H: 79°F
L: 68°F
Air Quality
Nitrogen Dioxide: 16.8 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 46 μg/m3
Astronomical
Sun Transit: 1:02 PM
Sunset: 8:30 PM
Daylight: 14 hrs 53 mins
Moon Transit: 3:50 PM
Moonset: 11:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%
Best Times for Fishing or Hunting
Major Periods
2:46 AM - 5:16 AM3:20 PM - 5:50 PM
Minor Periods
12:00 AM - 12:00 AM7:45 AM - 9:15 AM
Action Rating: 3 out of 5
Flood Warning issued June 15 at 10:06PM CDT until June 19 at 7:00AM CDT by NWS St Louis MO
Effective: Mon June 15, 2026, 10:06 PM
Expires: Wed June 17, 2026, 10:15 AM
...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Chester. ...The Flood Warning continues for the following rivers in Missouri...Illinois... Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Winfield. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Winfield. * WHEN...From Tuesday evening to Friday morning. * IMPACTS...At 23.0 feet, A few local islands begin to flood. * ADDITIONAL DETAILS... - At 9:30 PM CDT Monday the stage was 25.7 feet. - Forecast...The river is expected to rise above flood stage Tuesday evening to a crest of 26.1 feet Wednesday morning. It will then fall below flood stage early Thursday morning. - Flood stage is 26.0 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 June 16 at 10:13AM CDT until June 19 at 1:00AM CDT by NWS St Louis MO
Effective: Tue June 16, 2026, 10:13 AM
Expires: Wed June 17, 2026, 10:15 PM
...The National Weather Service in St Louis has issued a Flood Warning for the following rivers in Missouri... Missouri River at St. Charles. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Missouri River at St. Charles. * WHEN...Until late Thursday night. * 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 10:00 AM CDT Tuesday the stage was 25.0 feet. - Forecast...The river is expected to rise above flood stage this afternoon to a crest of 25.3 feet just after midnight tonight. It will then fall below flood stage tomorrow evening. - Flood stage is 25.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Flood Warning issued June 16 at 10:10PM CDT until June 18 at 1:00PM CDT by NWS St Louis MO
Effective: Tue June 16, 2026, 10:10 PM
Expires: Thu June 18, 2026, 10:15 AM
...The Flood Warning continues for the following rivers in Missouri...Illinois... Missouri River at St. Charles. Mississippi River at Chester. Mississippi River at Clarksville. Mississippi River at Mel Price LD. Meramec River near Arnold. Illinois River at Hardin. Mississippi River at Louisiana. ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Missouri River at Hermann. Missouri River near Chamois. Illinois River at Valley City. 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 Thursday 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 10:00 PM CDT Tuesday the stage was 25.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 PM CDT Tuesday was 25.2 feet. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 17.9 feet Sunday evening. - Flood stage is 25.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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 June 15 at 9:17PM CDT until June 23 at 1:00AM CDT by NWS St Louis MO
Effective: Mon June 15, 2026, 9:17 PM
Expires: Wed June 17, 2026, 9:30 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Hardin. Illinois River at Valley City. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Illinois River at Hardin. * WHEN...From late tonight to Tuesday, June 23. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 8:30 PM CDT Monday the stage was 24.9 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 25.7 feet early Friday morning. It will then fall below flood stage Sunday evening. - Flood stage is 25.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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 June 16 at 10:16AM CDT by NWS St Louis MO
Effective: Tue June 16, 2026, 10:16 AM
Expires: Wed June 17, 2026, 10:30 PM
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Hardin. Illinois River at Valley City. 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...Illinois River at Hardin. * WHEN...Until further notice. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 10:00 AM CDT Tuesday the stage was 25.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Tuesday was 25.1 feet. - Forecast...The river will rise to 25.5 feet early Sunday afternoon. It will then fall Sunday evening. It will rise to 25.5 feet early Monday morning. It will then fall again but remain above flood stage. - Flood stage is 25.0 feet.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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: 7.2 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 77.71 μg/m3
Astronomical
Sun Transit: 1:02 PM
Sunset: 8:30 PM
Daylight: 14 hrs 53 mins
Moon Transit: 3:50 PM
Moonset: 11:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%
Best Times for Fishing or Hunting
Major Periods
2:46 AM - 5:16 AM3:20 PM - 5:50 PM
Minor Periods
12:00 AM - 12:00 AM7:45 AM - 9:15 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.55 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 79.75 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 54 mins
Moon Transit: 4:44 PM
Moonset: 12:13 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%
Best Times for Fishing or Hunting
Major Periods
3:44 AM - 6:14 AM4:14 PM - 6:44 PM
Minor Periods
9:02 AM - 10:32 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 12.87 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 72.54 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 54 mins
Moon Transit: 5:34 PM
Moonset: 12:45 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%
Best Times for Fishing or Hunting
Major Periods
4:36 AM - 7:06 AM5:04 PM - 7:34 PM
Minor Periods
10:15 AM - 11:45 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 10.58 μg/m3
Sulphur Dioxide: 2.88 μg/m3
Ozone: 88.79 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:30 PM
Daylight: 14 hrs 54 mins
Moon Transit: 6:19 PM
Moonset: 12:12 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%
Best Times for Fishing or Hunting
Major Periods
5:23 AM - 7:53 AM5:49 PM - 8:19 PM
Minor Periods
11:23 AM - 12:53 AM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 11.58 μg/m3
Sulphur Dioxide: 1.94 μg/m3
Ozone: 61.88 μg/m3
Astronomical
Sun Transit: 1:03 PM
Sunset: 8:31 PM
Daylight: 14 hrs 54 mins
Moon Transit: 7:03 PM
Moonset: 12:36 AM
Moon Phase: First Quarter
Moon Illumination: 38.5%
Best Times for Fishing or Hunting
Major Periods
6:07 AM - 8:37 AM6:33 PM - 9:03 PM
Minor Periods
12:28 AM - 1:58 PM12:06 AM - 1:36 AM
Action Rating: 2 out of 5