Zip 99901 (Ketchikan, AK) Climate

99901 Ketchikan, AK experiences mild temperatures with winters that rarely dip below freezing. Summers are relatively cool and the area sees an average of 56 inches of rainfall a year. The climate in Ketchikan is heavily influenced by the nearby ocean, making it one of the wettest cities in the United States. In addition to annual rainfall, there are numerous rain showers throughout the year, resulting in a high relative humidity. Winters tend to be cloudy and summer days usually clear up around mid-afternoon.

Ketchikan (zip 99901), Alaska gets 141 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Ketchikan (zip 99901) averages 27 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 100 sunny days per year in Ketchikan (zip 99901). The US average is 205 sunny days.

Ketchikan (zip 99901) gets some kind of precipitation, on average, 234 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 65 degrees
Winter Low: the January low is 31
Rain: averages 141 inches of rain a year
Snow: averages 27 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 99901 zip code is 5.6 (10=best), which means it is one of the most pleasant places in Alaska.

7.7 Summer - 3.7 Winter

July, August and June are the most pleasant months in the 99901 zip code, while January and December are the least comfortable months.

Climate	Ketchikan, Alaska	United States
	Unlock	38.1 in.
	27.1 in.	Unlock
	Unlock	106.2 days
	100 days	Unlock
	64.6°	85.8°
	Unlock	21.7°
	5.6	Unlock
	Unlock	4.3
	1024 ft.	Unlock

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for the 99901 zip code with an average high temperature of 64.9°, which ranks it as about average compared to other places in Alaska. In the 99901 zip code, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 99901 zip code are August, July and June.

In the 99901 zip code, there are 0.1 days annually when the high temperature is over 90°, which is hotter than most places in Alaska.

January has the coldest nighttime temperatures for the 99901 zip code with an average of 30.7°. This is one of the warmest places in Alaska.

In the 99901 zip code, there are 75.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Alaska.

In the 99901 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Alaska.

Humidity is low in the 99901 zip code, and some people might find the dryness to be uncomfortable. Days with noticeable humidity are rare throughout the year. A very dry climate can lead to cracked, itchy skin and dry eyes.

October is the wettest month in the 99901 zip code with 19.5 inches of rain, and the driest month is July with 5.9 inches. The wettest season is Winter with 36% of yearly precipitation and 15% occurs in Autumn, which is the driest season. The annual rainfall of 141.0 inches in the 99901 zip code means that it is one of the wettest places in Alaska.

October is the rainiest month in the 99901 zip code with 24.2 days of rain, and June is the driest month with only 15.6 rainy days. There are 233.7 rainy days annually in the 99901 zip code, which is one of the rainiest places in Alaska. The rainiest season is Winter when it rains 29% of the time and the driest is Autumn with only a 20% chance of a rainy day.

An annual snowfall of 27.1 inches in the 99901 zip code means that it is one of the least snowy places in Alaska. December is the snowiest month in the 99901 zip code with 6.5 inches of snow, and 6 months of the year have significant snowfall.

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