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Ketchikan (AK) Climate by Month

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 day and night temperature

In Ketchikan, temperatures differ significantly between summer and winter months. Typically, daytime temperatures range from a moderate 17°C in August to a chilly 4°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to 0°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

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.

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

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.

Monthly hours of sunshine

Data from: Annette Island, the United States of America (34 KM, 21 Miles).

Daily hours of sunshine

Data from: Annette Island, the United States of America (34 KM, 21 Miles).

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:
  • Which is the warmest month in Ketchikan?
    August has an average maximum temperature of 17°C and is the warmest month of the year.
  • Which is the coldest month in Ketchikan?
    The coldest month is January with an average maximum temperature of 4°C.
  • Which is the wettest month in Ketchikan?
    October tops the wettest month list with 422 mm of rainfall.
  • Which is the driest month in Ketchikan?
    June is the driest month with 160 mm of precipitation.
  • Which is the sunniest month in Ketchikan?
    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.

    Forecast for Ketchikan (AK)

    Sat   Nov 23
    2°C | -2°C
    NE 14 km/h
    almost clear and no rain

    almost clear and no rain

    Sun   Nov 24
    2°C | -3°C
    N 7 km/h
    clear and no rain

    clear and no rain

    Mon   Nov 25
    3°C | -3°C
    E 4 km/h
    broken clouds and no rain

    broken clouds and no rain