Average humidity in Ketchikan (AK)

On this page you find more information about the monthly relative humidity over the year in Ketchikan (Alaska), the United States of America.

Ketchikan's humidity levels vary throughout the year. The highest levels occur in September, reaching 82% (very high), while the lowest is recorded in March at 75%.

Throughout the year, the average humidity in Ketchikan is 78%.

Humidity plays an important role in how temperatures are felt. During the warmest month, August, the maximum average temperature is around 17°C (63°F).

During the coldest month, January, the maximum average temperature is around 4°C (39°F). This period has high humidity. When winter temperatures are low and humidity is high, it can make the air feel even colder than it actually is. Check out our detailed temperature page for more information.