Ketchikan (AK) Weather & Climate: Best Time to Visit

In Ketchikan, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a moderate 17°C (63°F) in August to a chilly 4°C (39°F) in the coolest month, January.

Nights vary from 13°C (55°F) in August to around 0°C (32°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Ketchikan experiences significant rain/snowfall throughout the year, averaging 3421 mm (135 in) of precipitation annually. The climate in Ketchikan shows significant variation throughout the year. Expect heavy rainfall in October, the wettest month, with an average of 422 mm (17 in) of precipitation over 23 rainy days.

In contrast, the driest month June offers drier and sunnier days, with around 160 mm (6.3 in) of rainfall over 15 rainy days. For more details, please visit our Ketchikan Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Ketchikan serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.2 hours of sunshine daily, and embrace the darker days in December, offering only 1.2 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Ketchikan.

The city experiences its highest humidity in September, reaching 82%. In March, the humidity drops to its lowest level at 75%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year