Weather for St Charles, Missouri
Current Weather
Five Day Weather Forecast
Thu
H: 83°F
L: 65°F
Fri
H: 81°F
L: 61°F
Sat
H: 86°F
L: 68°F
Sun
H: 71°F
L: 63°F
Mon
H: 74°F
L: 56°F
Air Quality
Nitrogen Dioxide: 6.7 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 65 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
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 16 at 10:10PM 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...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 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 remain steady above flood stage at 25.2 feet. - 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 17 at 10:07PM CDT by NWS St Louis MO
Effective: Wed June 17, 2026, 10:07 PM
Expires: Fri June 19, 2026, 10:15 AM
...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Mel Price LD. Mississippi River at Chester. Illinois River at Valley City. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Hardin. ...The Flood Warning is cancelled for the following rivers in Missouri...Illinois... Mississippi River at Clarksville. Mississippi River at Louisiana. 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 9:30 PM CDT Wednesday the stage was 25.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM CDT Wednesday was 25.4 feet. - Forecast...The river is expected to rise to a crest of 25.4 feet just after midnight tonight. It will then rise to 25.5 feet early Tuesday morning. Additional rises are possible thereafter. - 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 June 16 at 10:10PM CDT until June 19 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 forecast. * WHERE...Mississippi River at Mel Price LD. * WHEN...Until Friday afternoon. * IMPACTS...At 20.8 feet, Unprotected farm land begins to flood * ADDITIONAL DETAILS... - At 10:00 PM CDT Tuesday the stage was 21.0 feet. - Forecast...The river is expected to rise above flood stage late this evening to a crest of 21.2 feet tomorrow morning. It will then fall below flood stage Thursday morning. - Flood stage is 21.0 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 17 at 10:07PM CDT until June 19 at 1:00PM CDT by NWS St Louis MO
Effective: Wed June 17, 2026, 10:07 PM
Expires: Fri June 19, 2026, 10:15 AM
...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Mel Price LD. Mississippi River at Chester. Illinois River at Valley City. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Hardin. ...The Flood Warning is cancelled for the following rivers in Missouri...Illinois... Mississippi River at Clarksville. Mississippi River at Louisiana. 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 Friday afternoon. * IMPACTS...At 20.8 feet, Unprotected farm land begins to flood * ADDITIONAL DETAILS... - At 9:30 PM CDT Wednesday the stage was 21.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM CDT Wednesday was 21.3 feet. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 16.1 feet Wednesday, June 24. - 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: 10.78 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 68.79 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: 12.39 μg/m3
Sulphur Dioxide: 1.86 μg/m3
Ozone: 78 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: 11.18 μg/m3
Sulphur Dioxide: 3.1 μg/m3
Ozone: 90.79 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: 9.89 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 61.63 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
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.69 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 54.63 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:31 PM
Daylight: 14 hrs 54 mins
Moon Transit: 7:45 PM
Moonset: 12:58 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%
Best Times for Fishing or Hunting
Major Periods
6:50 AM - 9:20 AM7:15 PM - 9:45 PM
Minor Periods
1:31 PM - 3:01 PM12:28 AM - 1:58 AM
Action Rating: 2 out of 5