Zip 99643 (Old Harbor, AK) Climate

Old Harbor, AK has a maritime climate characterized by relatively mild winter temperatures and cool summers. Average January temperatures are around 25 degrees Fahrenheit while average July temperatures range from 50 to 60 degrees Fahrenheit. Rainfall is fairly evenly distributed throughout the year, with an average total of about 39 inches annually. Snowfall is also common in the winter months, with an average of 25 inches per year. The area experiences strong winds year-round due to its coastal location on the Gulf of Alaska.

Old Harbor (zip 99643), Alaska gets 82 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Old Harbor (zip 99643) averages 69 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 133 sunny days per year in Old Harbor (zip 99643). The US average is 205 sunny days.

Old Harbor (zip 99643) gets some kind of precipitation, on average, 203 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 60 degrees
Winter Low: the January low is 26
Rain: averages 82 inches of rain a year
Snow: averages 69 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 99643 zip code is 5.1 (10=best), which means it is more comfortable than most places in Alaska.

7.2 Summer - 3.5 Winter

August, July and June are the most pleasant months in the 99643 zip code, while January and February are the least comfortable months.

Climate	Old Harbor, Alaska	United States
	Unlock	38.1 in.
	68.9 in.	Unlock
	Unlock	106.2 days
	133 days	Unlock
	59.7°	85.8°
	Unlock	21.7°
	5.1	Unlock
	Unlock	4.3
	248 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 99643 zip code with an average high temperature of 61.2°, which ranks it as cooler than most places in Alaska. In the 99643 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 99643 zip code are August, July and September.

In the 99643 zip code, there are 0.0 days annually when the high temperature is over 90°, which is about average compared to other places in Alaska.

January has the coldest nighttime temperatures for the 99643 zip code with an average of 26.2°. This is warmer than most places in Alaska.

In the 99643 zip code, there are 130.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Alaska.

In the 99643 zip code, there are 0.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Alaska.

Humidity is low in the 99643 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.

December is the wettest month in the 99643 zip code with 9.7 inches of rain, and the driest month is August with 4.9 inches. The wettest season is Spring with 31% of yearly precipitation and 20% occurs in Autumn, which is the driest season. The annual rainfall of 81.8 inches in the 99643 zip code means that it is one of the wettest places in Alaska.

December is the rainiest month in the 99643 zip code with 19.6 days of rain, and August is the driest month with only 14.2 rainy days. There are 203.1 rainy days annually in the 99643 zip code, which is rainier than most places in Alaska. The rainiest season is Spring when it rains 28% of the time and the driest is Autumn with only a 23% chance of a rainy day.

An annual snowfall of 68.9 inches in the 99643 zip code means that it is about average compared to other places in Alaska. February is the snowiest month in the 99643 zip code with 15.1 inches of snow, and 7 months of the year have significant snowfall.

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