Average humidity in Mercer Island (WA)
On this page you find more information about the monthly relative humidity over the year in Mercer Island (Washington State), the United States of America.
Mercer Island shows variation in the level of humidity throughout the year. The highest humidity is noted duing December, it reaches up to 80%, which is categorized as very high. On the other hand, the lowest humidity is recorded in July, with levels falling to 65%.
The average humidity in Mercer Island is approximately 73%, which is high.
Humidity is an essential factor in how you experience temperature. During the warmest month, August, the temperature is around 25°C. When this period is accompanied by high humidity, it results in a higher perceived temperature. This can cause greater discomfort, while in winter it can make the air feel much colder, adding to the cooler temperatures. Check out our detailed temperature page for more information.
Forecast for Mercer Island (WA)
Sat Dec 28
12°C | 7°C
S 
7 m/s
7 m/s3.8 mm
broken clouds and rain
Sun Dec 29
9°C | 5°C
S 4 m/s
4 m/s6.2 mm
overcast and heavy rain
Mon Dec 30
9°C | 4°C
SW 5 m/s
5 m/s2.5 mm
broken clouds and rain
