August weather forecastBlack Diamond, WA
August
Weather in August
August, the last month of the summer in Black Diamond, is also a moderately hot month, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 50.2°F (10.1°C).Temperature
The warmest time of the year is August, with temperatures averaging a high of 75.4°F (24.1°C) and a low of 50.2°F (10.1°C).Humidity
In August, the average relative humidity in Black Diamond is 71%.Rainfall
In Black Diamond, in August, during 6.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, in Black Diamond, there are 182.4 rainfall days, and 36.77" (934mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Black Diamond, the average length of the day in August is 14h and 11min.On the first day of the month, sunrise is at 5:47 am and sunset at 8:41 pm. On the last day of August, sunrise is at 6:26 am and sunset at 7:49 pm PDT.
Sunshine
With an average of 10.7h of sunshine, August has the most sunshine of the year in Black Diamond, Washington.UV index
In August, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 in August translates into these instructions:
Ensure safety - Recommendations to avert sunburn are presented. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Black Diamond, WA
- Average high temperature in August: 75.4°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is December (40.8°F).
- Average low temperature in August: 50.2°F
The month with the highest average low temperature is August (50.2°F).
The coldest month (with the lowest average low temperature) is February (31.6°F).
Average pressure in August
Black Diamond, WA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30"Hg).
Average wind speed in August
Black Diamond, WA
- Average wind speed in August: 3.5mph
The windiest month (with the highest average wind speed) is January (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in August
Black Diamond, WA
- Average humidity in August: 71%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is July (70%).
Average rainfall in August
Black Diamond, WA
- Average rainfall in August: 0.71"
The wettest month (with the highest rainfall) is December (5.43").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in August
Black Diamond, WA
- Average rainfall days in August: 6.7 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in August
Black Diamond, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Black Diamond, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (6 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in August /
Average sunshine in August
Black Diamond, WA
- Average daylight in August: 14h and 12min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 10h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 6min).
Average sunshine days in August
Black Diamond, WA
- Average sunshine days in August: 22 days
The month with the most sunshine days is August (22 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in August
Black Diamond, WA
- Average UV index in August: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in August
Black Diamond, WA
- Average cloud cover in August: 27
The months with the most cloud cover are January, February, March and December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
Black Diamond, WA
- Average visibility in August: 6mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
