Zip 99170 (Rosalia, WA) Climate

The climate in 99170 Rosalia, WA is generally mild, with warm summers and cool winters. Temperatures usually stay within a comfortable range throughout the year, rarely exceeding 85°F during the summer months or dropping below freezing in the winter. Rainfall is relatively moderate and evenly distributed throughout the year, resulting in an average of around 28 inches of precipitation annually. The area enjoys an abundance of sunshine throughout the year, with more than 300 sunny days on average each year.

Rosalia (zip 99170), Washington gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Rosalia (zip 99170) averages 30 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 174 sunny days per year in Rosalia (zip 99170). The US average is 205 sunny days.

Rosalia (zip 99170) gets some kind of precipitation, on average, 108 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 83 degrees
Winter Low: the January low is 23
Rain: averages 18 inches of rain a year
Snow: averages 30 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 99170 zip code is 6.8 (10=best), which means it is less comfortable than most places in Washington.

9 Summer - 4.3 Winter

July, August and September are the most pleasant months in the 99170 zip code, while December and January are the least comfortable months.

Climate	Rosalia, Washington	United States
	Unlock	38.1 in.
	30.2 in.	Unlock
	Unlock	106.2 days
	174 days	Unlock
	83.2°	85.8°
	Unlock	21.7°
	6.8	Unlock
	Unlock	4.3
	2442 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 99170 zip code with an average high temperature of 83.5°, which ranks it as warmer than most places in Washington. In the 99170 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 99170 zip code are September, June and July.

In the 99170 zip code, there are 16.3 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

December has the coldest nighttime temperatures for the 99170 zip code with an average of 21.5°. This is colder than most places in Washington.

In the 99170 zip code, there are 146.8 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Washington.

In the 99170 zip code, there are 2.7 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Washington.

Humidity is low in the 99170 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 99170 zip code with 2.6 inches of rain, and the driest month is August with 0.5 inches. The wettest season is Spring with 33% of yearly precipitation and 14% occurs in Autumn, which is the driest season. The annual rainfall of 17.7 inches in the 99170 zip code means that it is drier than most places in Washington.

November is the rainiest month in the 99170 zip code with 13.5 days of rain, and August is the driest month with only 3.5 rainy days. There are 107.5 rainy days annually in the 99170 zip code, which is less rainy than most places in Washington. The rainiest season is Spring when it rains 32% of the time and the driest is Autumn with only a 15% chance of a rainy day.

An annual snowfall of 30.2 inches in the 99170 zip code means that it is snowier than most places in Washington. December is the snowiest month in the 99170 zip code with 11.4 inches of snow, and 5 months of the year have significant snowfall.

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