Weather for St Charles, Missouri
Current Weather
Five Day Weather Forecast
Wed
H: 62°F
L: 46°F
Thu
H: 67°F
L: 43°F
Fri
H: 77°F
L: 51°F
Sat
H: 78°F
L: 53°F
Sun
H: 62°F
L: 51°F
Air Quality
Nitrogen Dioxide: 34.45 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 49 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:59 PM
Daylight: 14 hrs 1 mins
Moon Transit: 4:37 AM
Moonset: 9:07 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:07 AM - 6:37 AM4:28 PM - 6:58 PM
Minor Periods
8:37 AM - 10:07 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Flood Warning issued May 5 at 8:27PM CDT until May 8 at 1:00AM CDT by NWS St Louis MO
Effective: Tue May 5, 2026, 8:27 PM
Expires: Thu May 7, 2026, 8:30 AM
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Hardin. ...The Flood Warning continues for the following rivers in Illinois... 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 late Thursday night. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 25.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Tuesday was 26.0 feet. - Forecast...The river is expected to fall below flood stage tomorrow evening and continue falling to 22.3 feet Tuesday, May 12. - 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 6 at 10:10AM CDT until May 10 at 1:00PM CDT by NWS St Louis MO
Effective: Wed May 6, 2026, 10:10 AM
Expires: Thu May 7, 2026, 10:15 PM
...The Flood Warning is extended for the following river in Illinois... 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 Sunday afternoon. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 9:30 AM CDT Wednesday the stage was 25.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 AM CDT Wednesday was 25.5 feet. - Forecast...The river is expected to rise to a crest of 25.5 feet tomorrow morning. It will then fall below flood stage Saturday 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
Weather Forecast
Air Quality
Nitrogen Dioxide: 8.14 μg/m3
Sulphur Dioxide: 2.42 μg/m3
Ozone: 69.2 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 7:59 PM
Daylight: 14 hrs 1 mins
Moon Transit: 4:37 AM
Moonset: 9:07 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:07 AM - 6:37 AM4:28 PM - 6:58 PM
Minor Periods
8:37 AM - 10:07 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 16.58 μg/m3
Sulphur Dioxide: 2.53 μg/m3
Ozone: 66.36 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:00 PM
Daylight: 14 hrs 3 mins
Moon Transit: 5:27 AM
Moonset: 10:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%
Best Times for Fishing or Hunting
Major Periods
4:57 AM - 7:27 AM5:18 PM - 7:48 PM
Minor Periods
9:38 AM - 11:08 AM12:22 AM - 1:52 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 11.44 μg/m3
Sulphur Dioxide: 2.71 μg/m3
Ozone: 82.36 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:01 PM
Daylight: 14 hrs 5 mins
Moon Transit: 6:16 AM
Moonset: 11:10 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%
Best Times for Fishing or Hunting
Major Periods
5:46 AM - 8:16 AM6:05 PM - 8:35 PM
Minor Periods
10:40 AM - 12:10 AM12:58 AM - 2:28 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 10.79 μg/m3
Sulphur Dioxide: 3.24 μg/m3
Ozone: 80.56 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:02 PM
Daylight: 14 hrs 7 mins
Moon Transit: 7:02 AM
Moonset: 12:14 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%
Best Times for Fishing or Hunting
Major Periods
6:32 AM - 9:02 AM6:51 PM - 9:21 PM
Minor Periods
11:44 AM - 1:14 PM1:29 AM - 2:59 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 10.62 μg/m3
Sulphur Dioxide: 2.66 μg/m3
Ozone: 79.54 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:03 PM
Daylight: 14 hrs 9 mins
Moon Transit: 7:48 AM
Moonset: 1:18 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%
Best Times for Fishing or Hunting
Major Periods
7:18 AM - 9:48 AM7:36 PM - 10:06 PM
Minor Periods
12:48 AM - 2:18 PM1:56 AM - 3:26 AM
Action Rating: 3 out of 5