Weather in Saint Charles, MO
Updated 2026-09-26 07:45 local time · ZIP codes 63301, 63303, 63304
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
61°12% rain62°12% rain64°11% rain69°10% rain69°10% rain68°10% rain67°10% rain66°11% rain
63°20% rain
60°43% rain60°22% rain
59°21% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Today vs yesterday in Saint Charles
Weather insights for today
There is a moderate rain chance, peaking near 43%.
It feels like 56°F with winds near 6 mph.
69°F, 10% rain chance and 5 mph wind.
Visibility is around 6 mi; gusts may reach 12 mph.
Current temperature is 61°F, wind 6 mph, rain chance up to 43%.
UV index is 0.
Local weather characteristics in Saint Charles
Missouri sits where different air masses often meet, producing hot humid summers, cold winter spells, rapid weather changes and frequent thunderstorms.
Saint Charles is part of the Midwest weather region. The forecast point is near 38.78°N latitude and 90.48°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Saint Charles weather today
Overcast and 61°F in Saint Charles, MO. Today's high is 69°F with a 57% rain chance. Winds are around 6 mph with gusts near 12 mph. Relative humidity is 52%, pressure is 30.13 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Saint Charles
Sunrise is at 06:53 AM and sunset is at 06:53 PM. Tomorrow's forecast calls for Sunny with a high near 76°F and a low near 56°F. The maximum rain chance is 36%.