Weather for St Charles, Missouri
Current Weather
Five Day Weather Forecast
Tue
H: 87°F
L: 59°F
Wed
H: 83°F
L: 67°F
Thu
H: 87°F
L: 69°F
Fri
H: 85°F
L: 68°F
Sat
H: 96°F
L: 71°F
Air Quality
Nitrogen Dioxide: 19.1 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 29 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:31 PM
Daylight: 14 hrs 54 mins
Moon Transit: 8:28 PM
Moonset: 1:21 AM
Moon Phase: First Quarter
Moon Illumination: 61.0%
Best Times for Fishing or Hunting
Major Periods
7:32 AM - 10:02 AM7:58 PM - 10:28 PM
Minor Periods
2:33 PM - 4:03 PM12:51 AM - 2:21 AM
Action Rating: 2 out of 5
Flood Warning issued June 22 at 11:29AM CDT by NWS St Louis MO
Effective: Mon June 22, 2026, 11:29 AM
Expires: Tue June 23, 2026, 11:30 PM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Meredosia. Illinois River at La Grange LD. Illinois River at Valley City. Illinois River at Hardin. 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. * ADDITIONAL DETAILS... - At 10:30 AM CDT Monday the stage was 26.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:30 AM CDT Monday was 26.0 feet. - Forecast...The river is expected to rise to a crest of 26.8 feet Thursday 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 June 22 at 10:17PM CDT by NWS St Louis MO
Effective: Mon June 22, 2026, 10:17 PM
Expires: Wed June 24, 2026, 10:30 AM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Meredosia. Illinois River at La Grange LD. Illinois River at Valley City. Illinois River at Hardin. 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 Monday the stage was 26.3 feet and rising. - Recent Activity...The river rose above flood stage on June 16. It initially crested near 25.3 feet on June 17, but has since begun to rise again. - Forecast...The river is expected to rise to a crest of 26.9 feet on Thursday. - 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 22 at 11:45AM CDT until June 25 at 9:00PM CDT by NWS St Louis MO
Effective: Mon June 22, 2026, 11:45 AM
Expires: Tue June 23, 2026, 11:45 PM
...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. Mississippi River at Louisiana. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Clarksville. * WHEN...Until Thursday evening. * IMPACTS...At 25.5 feet, State Route P east of Elsberry begins flooding just east of the levee. * ADDITIONAL DETAILS... - At 11:30 AM CDT Monday the stage was 25.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Monday was 25.1 feet. - Forecast...The river is expected to rise to a crest of 25.8 feet tomorrow morning. It will then fall below flood stage Wednesday afternoon. - Flood stage is 25.0 feet.
Flood Warning issued June 22 at 11:33AM CDT until June 25 at 9:00PM CDT by NWS St Louis MO
Effective: Mon June 22, 2026, 11:33 AM
Expires: Tue June 23, 2026, 11:45 PM
...The Flood Warning continues for the following rivers in Illinois...Missouri... 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 Clarksville. * WHEN...Until Thursday evening. * IMPACTS...At 25.5 feet, State Route P east of Elsberry begins flooding just east of the levee. * ADDITIONAL DETAILS... - At 11:00 AM CDT Monday the stage was 25.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:00 AM CDT Monday was 25.1 feet. - Forecast...The river is expected to rise to a crest of 25.8 feet tomorrow morning. It will then fall below flood stage Wednesday afternoon. - 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 22 at 10:12PM CDT until June 26 at 1:00AM CDT by NWS St Louis MO
Effective: Mon June 22, 2026, 10:12 PM
Expires: Wed June 24, 2026, 10:15 AM
...The Flood Warning is extended for the following rivers in Illinois...Missouri... 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 Clarksville. * WHEN...Until late Thursday night. * IMPACTS...At 25.3 feet, The road to Port Marmac, a riverside community of about 13 homes just south of Clarksville, begins flooding. * ADDITIONAL DETAILS... - At 10:00 PM CDT Monday the stage was 25.2 feet and nearing a crest. - Recent Activity...The river rose above flood stage this morning and is near a crest. - Forecast...The river is expected to crest near 25.3 feet just after midnight tonight. It will then fall below flood stage Wednesday 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: 12.5 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 67.83 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:31 PM
Daylight: 14 hrs 54 mins
Moon Transit: 8:28 PM
Moonset: 1:21 AM
Moon Phase: First Quarter
Moon Illumination: 61.0%
Best Times for Fishing or Hunting
Major Periods
7:32 AM - 10:02 AM7:58 PM - 10:28 PM
Minor Periods
2:33 PM - 4:03 PM12:51 AM - 2:21 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 13.01 μg/m3
Sulphur Dioxide: 3.44 μg/m3
Ozone: 78.67 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:31 PM
Daylight: 14 hrs 53 mins
Moon Transit: 9:12 PM
Moonset: 1:45 AM
Moon Phase: First Quarter
Moon Illumination: 71.7%
Best Times for Fishing or Hunting
Major Periods
8:16 AM - 10:46 AM8:42 PM - 11:12 PM
Minor Periods
3:35 PM - 5:05 PM1:15 AM - 2:45 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 12.54 μg/m3
Sulphur Dioxide: 3.29 μg/m3
Ozone: 76.88 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:31 PM
Daylight: 14 hrs 53 mins
Moon Transit: 9:58 PM
Moonset: 2:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.2%
Best Times for Fishing or Hunting
Major Periods
9:01 AM - 11:31 AM9:28 PM - 11:58 PM
Minor Periods
4:37 PM - 6:07 PM1:42 AM - 3:12 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 13.88 μg/m3
Sulphur Dioxide: 2.34 μg/m3
Ozone: 52.54 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:31 PM
Daylight: 14 hrs 53 mins
Moon Transit: 10:46 PM
Moonset: 2:44 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.2%
Best Times for Fishing or Hunting
Major Periods
9:48 AM - 12:18 AM12:00 AM - 12:00 AM
Minor Periods
5:39 PM - 7:09 PM2:14 AM - 3:44 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 8.36 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 47.88 μg/m3
Astronomical
Sun Transit: 1:05 PM
Sunset: 8:31 PM
Daylight: 14 hrs 53 mins
Moon Transit: 11:37 PM
Moonset: 3:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.2%
Best Times for Fishing or Hunting
Major Periods
10:37 AM - 1:07 PM12:00 AM - 12:00 AM
Minor Periods
6:37 PM - 8:07 PM2:51 AM - 4:21 AM
Action Rating: 3 out of 5