Weather in Union, WA
Updated 2026-09-26 08:15 local time · ZIP codes 98592
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
44°9% rain48°5% rain53°4% rain56°3% rain60°2% rain
62°10% rain63°10% rain63°10% rain63°10% rain61°10% rain59°12% rain53°16% 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 16%).
It feels like 40°F with winds near 2 mph.
60°F, 2% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 12 mph.
Current temperature is 44°F, wind 2 mph, rain chance up to 16%.
UV index is 0.
Local weather characteristics in Union
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.
Union is part of the West weather region. The forecast point is near 47.36°N latitude and 123.10°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.
Union weather today
Sunny and 44°F in Union, WA. Today's high is 63°F with a 10% rain chance. Winds are around 2 mph with gusts near 7 mph. Relative humidity is 78%, pressure is 30.18 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Union
Sunrise is at 07:04 AM and sunset is at 07:02 PM. Tomorrow's forecast calls for Sunny with a high near 67°F and a low near 43°F. The maximum rain chance is 8%.