Black Diamond, WA Climate

Black Diamond, WA has a mild climate year-round with warm summers and cool winters. It is located in the foothills of the Cascade Mountain Range, which keeps the area temperate and comfortable throughout the year. Average high temperatures range from around 50 degrees Fahrenheit in January to 80 degrees Fahrenheit in July. Average low temperatures range from around 33 degrees Fahrenheit in December to 54 degrees Fahrenheit in June. The area receives an average of 21 inches of rain annually, making it one of the drier areas in Washington state. There are also occasional snowfalls during winter months, but they tend to be light and short-lived.

Black Diamond, Washington gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Black Diamond averages 5 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 156 sunny days per year in Black Diamond. The US average is 205 sunny days.

Black Diamond gets some kind of precipitation, on average, 174 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 50 inches of rain a year
Snow: averages 5 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Black Diamond is 7.0 (10=best), which means it is less comfortable than most places in Washington.

9 Summer - 5.2 Winter

August, July and September are the most pleasant months in Black Diamond, while December and January are the least comfortable months.

Climate	Black Diamond, Washington	United States
	50.0 in.	38.1 in.
	4.7 in.	27.8 in.
	173.6 days	106.2 days
	156 days	205 days
	75.7°	85.8°
	34.7°	21.7°
	7	7
	2.6	4.3
	653 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 Black Diamond with an average high temperature of 76.4°, which ranks it as cooler than most places in Washington. In Black Diamond, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Black Diamond are August, July and September.

In Black Diamond, there are 3.3 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 Black Diamond with an average of 33.2°. This is about average compared to other places in Washington.

In Black Diamond, there are 49.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.

In Black Diamond, 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 Black Diamond 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 Black Diamond with 7.9 inches of rain, and the driest month is July with 1.3 inches. The wettest season is Spring with 34% of yearly precipitation and 11% occurs in Autumn, which is the driest season. The annual rainfall of 50.0 inches in Black Diamond means that it is wetter than most places in Washington.

November is the rainiest month in Black Diamond with 20.3 days of rain, and August is the driest month with only 5.8 rainy days. There are 173.6 rainy days annually in Black Diamond, 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 4.7 inches in Black Diamond means that it is about average compared to other places in Washington. November is the snowiest month in Black Diamond with 1.4 inches of snow, and 4 months of the year have significant snowfall.