Zip 99349 (Mattawa, WA) Climate

The climate in 99349 Mattawa, WA is generally dry and mild. Summers are relatively warm with temperatures averaging in the mid 70s, while winters are typically cool, with an average temperature of 35-40 degrees Fahrenheit. Precipitation is spread out throughout the year and generally not very heavy. On average there are about 10-15 inches of rain and 20 inches of snow annually. Generally the area does not experience extreme temperatures and benefits from a sunny climate most of the year.

Mattawa (zip 99349), Washington gets 8 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Mattawa (zip 99349) averages 9 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 201 sunny days per year in Mattawa (zip 99349). The US average is 205 sunny days.

Mattawa (zip 99349) gets some kind of precipitation, on average, 59 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 91 degrees
Winter Low: the January low is 27
Rain: averages 8 inches of rain a year
Snow: averages 9 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 99349 zip code is 7.6 (10=best), which means it is one of the most pleasant places in Washington.

8.7 Summer - 5.5 Winter

June, September and May are the most pleasant months in the 99349 zip code, while December and January are the least comfortable months.

Climate	Mattawa, Washington	United States
	Unlock	38.1 in.
	9.1 in.	Unlock
	Unlock	106.2 days
	201 days	Unlock
	91.1°	85.8°
	Unlock	21.7°
	7.6	Unlock
	Unlock	4.3
	773 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.

July is the hottest month for the 99349 zip code with an average high temperature of 91.1°, which ranks it as one of the hottest places in Washington. In the 99349 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 99349 zip code are May, September and June.

In the 99349 zip code, there are 45.7 days annually when the high temperature is over 90°, which is one of the hottest places in Washington.

December has the coldest nighttime temperatures for the 99349 zip code with an average of 25.3°. This is colder than most places in Washington.

In the 99349 zip code, there are 97.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In the 99349 zip code, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

Humidity is low in the 99349 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 99349 zip code with 1.3 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 39% of yearly precipitation and 12% occurs in Autumn, which is the driest season. The annual rainfall of 7.5 inches in the 99349 zip code means that it is one of the driest places in Washington.

December is the rainiest month in the 99349 zip code with 8.1 days of rain, and July is the driest month with only 1.7 rainy days. There are 59.1 rainy days annually in the 99349 zip code, which is one of the least rainy places in Washington. The rainiest season is Spring when it rains 37% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 9.1 inches in the 99349 zip code means that it is snowier than most places in Washington. December is the snowiest month in the 99349 zip code with 4.8 inches of snow, and 4 months of the year have significant snowfall.

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