Ketchikan Gateway Borough Climate
Ketchikan Gateway Borough, Alaska
Avg Annual Temp
46.6°F
Annual Precip
153.4"
Annual Snowfall
—
Extreme Heat Days
0.15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Ketchikan Gateway Borough Weather
One of America’s Wettest Regions
Ketchikan averages 46.6°F annually, which is mild for Alaska but defined by a massive 153.4 inches of precipitation. This is nearly triple the state average and far beyond the national median.
The Warm, Wet Edge of Alaska
Ketchikan is over 10 degrees warmer than the state average of 35.9°F. Its maritime climate ensures that even in January, temperatures average a relatively warm 35.7°F.
Wetter than its Coastal Peers
While Juneau is considered wet at 92.5 inches of rain, Ketchikan receives 153.4 inches, making it significantly Rainier. It remains the warmest major region in the state with an average of 46.6°F.
A Season of Endless Rain
The borough sees no extreme heat days, with summer averages hovering around 58.5°F. Winter is mild for the latitude, averaging 36.3°F, though snowfall data for the borough is not currently available.
Waterproofing is the Top Priority
In a region with 153.4 inches of rain, industrial-grade waterproof gear is a daily necessity. Home maintenance must prioritize drainage and mold prevention due to the persistent high humidity.
Frequently Asked Questions
What is the average temperature in Ketchikan Gateway Borough?
How much rain does Ketchikan Gateway Borough get?
How hot does Ketchikan Gateway Borough get in summer?
How cold are winters in Ketchikan Gateway Borough?
Track your own weather in Ketchikan Gateway Borough
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.