Roy, WA Climate


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United States / Washington / Seattle-Tacoma-Bellevue Metro Area / Pierce County / Roy / Zip Codes
Roy, WA has a moderate climate, with generally mild temperatures throughout the year. In the summer months, temperatures can reach into the mid-80s during the day, and in the winter months they can drop to around freezing at night. The area receives an average of about 34 inches of rain throughout the year, spread out over about 108 days. It is also relatively humid with an average humidity of 76%.

Roy, Washington gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Roy averages 6 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 142 sunny days per year in Roy. The US average is 205 sunny days.

Roy gets some kind of precipitation, on average, 161 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 46 inches of rain a year
Snow: averages 6 inches of snow a year

Bestplaces Comfort Index

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

9.2 Summer - 5.2 Winter
August, July and September are the most pleasant months in Roy, while December and January are the least comfortable months.

  ClimateRoy, WashingtonUnited States
  45.7 in.38.1 in.
  6.2 in.27.8 in.
  161.0 days106.2 days
  142 days205 days
  75.7°85.8°
  35.0°21.7°
  7.17
  2.64.3
  325 ft.2443 ft.
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 Roy with an average high temperature of 76.3°, which ranks it as cooler than most places in Washington. In Roy, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Roy are August, July and September.
In Roy, there are 2.9 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 Roy with an average of 33.8°. This is warmer than most places in Washington.
In Roy, there are 46.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.
In Roy, 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 Roy 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 August, July and September.
November is the wettest month in Roy with 7.5 inches of rain, and the driest month is July with 0.9 inches. The wettest season is Spring with 39% of yearly precipitation and 9% occurs in Autumn, which is the driest season. The annual rainfall of 45.7 inches in Roy means that it is wetter than most places in Washington.
November is the rainiest month in Roy with 19.8 days of rain, and August is the driest month with only 4.7 rainy days. There are 161.0 rainy days annually in Roy, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 12% chance of a rainy day.
An annual snowfall of 6.2 inches in Roy means that it is about average compared to other places in Washington. February is the snowiest month in Roy with 2.0 inches of snow, and 5 months of the year have significant snowfall.
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