Weather in Plymouth, WA
Updated 2026-09-26 07:00 local time · ZIP codes 99346
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
49°18% rain50°16% rain53°13% rain
57°4% rain
60°1% rain62°1% rain64°0% rain65°0% rain66°1% rain66°9% rain66°9% rain64°9% 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 18%).
It feels like 47°F with winds near 5 mph.
65°F, 0% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 17 mph.
Current temperature is 49°F, wind 5 mph, rain chance up to 18%.
UV index is 0.
Local weather characteristics in Plymouth
Washington has a mild, wetter marine climate west of the Cascades and a much drier interior climate east of the mountains. Terrain creates strong local rain, snow and temperature differences.
Plymouth is part of the West weather region. The forecast point is near 45.93°N latitude and 119.35°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.
Plymouth weather today
Overcast and 49°F in Plymouth, WA. Today's high is 66°F with a 7% rain chance. Winds are around 5 mph with gusts near 5 mph. Relative humidity is 68%, pressure is 30.11 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Plymouth
Sunrise is at 06:49 AM and sunset is at 06:47 PM. Tomorrow's forecast calls for Overcast with a high near 69°F and a low near 52°F. The maximum rain chance is 5%.