Weather in Mercer, MO
Updated 2026-09-26 11:00 local time · ZIP codes 64661
Partly Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
64°14% rain
68°11% rain
71°9% rain
72°15% rain72°15% rain72°15% rain70°18% rain71°22% rain70°22% rain
67°33% rain
65°62% rain64°69% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance reaches about 69% over the next 12 hours.
It feels like 59°F with winds near 13 mph.
71°F, 9% rain chance and 14 mph wind.
Visibility is around 6 mi; gusts may reach 20 mph.
Current temperature is 64°F, wind 13 mph, rain chance up to 69%.
UV index is 1.
Local weather characteristics in Mercer
Missouri sits where different air masses often meet, producing hot humid summers, cold winter spells, rapid weather changes and frequent thunderstorms.
Mercer is part of the Midwest weather region. The forecast point is near 40.51°N latitude and 93.53°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.
Mercer weather today
Partly Cloudy and 64°F in Mercer, MO. Today's high is 72°F with a 81% rain chance. Winds are around 13 mph with gusts near 20 mph. Relative humidity is 76%, pressure is 30.08 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Mercer
Sunrise is at 07:05 AM and sunset is at 07:05 PM. Tomorrow's forecast calls for Light rain shower with a high near 69°F and a low near 59°F. The maximum rain chance is 79%.