Ketchikan (AK) Weather and Climate: A Comprehensive Guide
The climate in Ketchikan is marked by big temperature swings throughout the year.
Temperatures range from mild during the warmest months
to cold in the cooler months.
It is also known for its large amounts of rain/snowfall.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
In Ketchikan, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a moderate 17°C in August to a chilly 4°C in the coolest month, January.
Nights are cooler, with lows often dropping to around 0°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Ketchikan experiences significant rain/snowfall throughout the year, averaging 3421 mm of precipitation annually. The climate in Ketchikan shows significant variation throughout the year. Expect heavy rainfall in October, with an average of 422 mm of precipitation over 23 rainy days. In contrast, June offers drier and sunnier days, with around 160 mm 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
Sunshine over the year
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
Average humidity
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%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
overcast and heavy rain overcast and rain broken clouds and rainForecast for Ketchikan (AK)
5 m/s
2 m/s
2 m/s
The best time of year to visit Ketchikan in the United States of America
The average rainfall figures in Ketchikan are quite high. Throughout the year, you have a chance of prolonged precipitation. So no matter what time of year you go, you will always have to deal with a high number of rainy days. This makes it more challenging to point out the best time of year to visit. If we needed to pick one month we would choose May which is the sunniest month of the year.Other facts from our historical weather data:
August has an average maximum temperature of 17°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 4°C.
October tops the wettest month list with 422 mm of rainfall.
June is the driest month with 160 mm of precipitation.
May is the sunniest month with an average of 185 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
