Zip 98027 (Issaquah, WA) Climate

98027 Issaquah, WA has a mild climate with cold, wet winters and warm, relatively dry summers. The average summer temperature is around 79°F (26°C) while the average winter temperature is 33°F (1°C). During the winter months, the area receives an average of 7 inches (18 cm) of precipitation each month compared to 2 inches (5 cm) in the summer. The area only receives about 20 days of snowfall each year. During the summer months, temperatures can reach up to 100°F (38°C). It is generally sunny here throughout the year with an average of 210 sunny days per year.

Issaquah (zip 98027), Washington gets 53 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Issaquah (zip 98027) averages 6 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 151 sunny days per year in Issaquah (zip 98027). The US average is 205 sunny days.

Issaquah (zip 98027) gets some kind of precipitation, on average, 173 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 76 degrees
Winter Low: the January low is 35
Rain: averages 53 inches of rain a year
Snow: averages 6 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 98027 zip code is 7.1 (10=best), which means it is about average compared to other places in Washington.

9.1 Summer - 5.2 Winter

August, July and September are the most pleasant months in the 98027 zip code, while December and January are the least comfortable months.

Climate	Issaquah, Washington	United States
	Unlock	38.1 in.
	6.2 in.	Unlock
	Unlock	106.2 days
	151 days	Unlock
	75.6°	85.8°
	Unlock	21.7°
	7.1	Unlock
	Unlock	4.3
	404 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 98027 zip code with an average high temperature of 76.1°, which ranks it as cooler than most places in Washington. In the 98027 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 98027 zip code are August, July and September.

In the 98027 zip code, there are 3.1 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

December has the coldest nighttime temperatures for the 98027 zip code with an average of 33.9°. This is warmer than most places in Washington.

In the 98027 zip code, there are 43.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

In the 98027 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

Humidity in the 98027 zip code is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and September.

November is the wettest month in the 98027 zip code with 8.6 inches of rain, and the driest month is July with 1.2 inches. The wettest season is Spring with 36% of yearly precipitation and 10% occurs in Autumn, which is the driest season. The annual rainfall of 52.5 inches in the 98027 zip code means that it is wetter than most places in Washington.

November is the rainiest month in the 98027 zip code with 20.4 days of rain, and August is the driest month with only 5.7 rainy days. There are 173.2 rainy days annually in the 98027 zip code, which is rainier than most places in Washington. The rainiest season is Spring when it rains 31% of the time and the driest is Autumn with only a 14% chance of a rainy day.

An annual snowfall of 6.2 inches in the 98027 zip code means that it is about average compared to other places in Washington. December is the snowiest month in the 98027 zip code with 1.9 inches of snow, and 5 months of the year have significant snowfall.

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