Weather in Saint Clair, MO
Updated 2026-09-26 10:00 local time · ZIP codes 63077
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
67°10% rain
68°11% rain69°10% rain71°10% rain73°10% rain72°10% rain72°10% rain71°10% rain70°10% rain
67°11% rain66°10% rain64°12% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 12%).
It feels like 62°F with winds near 5 mph.
70°F, 10% rain chance and 6 mph wind.
Visibility is around 6 mi; gusts may reach 14 mph.
Current temperature is 67°F, wind 5 mph, rain chance up to 12%.
UV index is 1.
Local weather characteristics in Saint Clair
Missouri sits where different air masses often meet, producing hot humid summers, cold winter spells, rapid weather changes and frequent thunderstorms.
Saint Clair is part of the Midwest weather region. The forecast point is near 38.35°N latitude and 90.98°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 Clair weather today
Overcast and 67°F in Saint Clair, MO. Today's high is 73°F with a 12% rain chance. Winds are around 5 mph with gusts near 7 mph. Relative humidity is 41%, pressure is 30.15 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Saint Clair
Sunrise is at 06:55 AM and sunset is at 06:55 PM. Tomorrow's forecast calls for Overcast with a high near 81°F and a low near 63°F. The maximum rain chance is 8%.