Average humidity in Portland (OR)
On this page you find more information about the monthly relative humidity over the year in Portland (Oregon), the United States of America.
Portland shows variation in the level of humidity throughout the year. The highest humidity is noted duing December, it reaches up to 83%, which is categorized as very high. On the other hand, the lowest humidity is recorded in July, with levels falling to 63%.
The average humidity in Portland 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 28°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 Portland (OR)
Sun Dec 22
11°C | 6°C
E 
7 m/s
7 m/s19 mm
overcast and heavy rain
Mon Dec 23
12°C | 8°C
E 7 m/s
7 m/s9.3 mm
broken clouds and rain
Tue Dec 24
12°C | 5°C
S 4 m/s
4 m/s7.6 mm
partly cloudy and rain
