Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May indicates a change in the average high-temperature, moving up from a fresh 53.2°F (11.8°C) in April to a refreshing 62.2°F (16.8°C). Black Diamond experiences a mean temperature of 41.4°F (5.2°C) during May nights.Humidity
In Black Diamond, the average relative humidity in May is 77%.Rainfall
In Black Diamond, in May, it is raining for 14.4 days, with typically 1.97" (50mm) of accumulated precipitation. In Black Diamond, during the entire year, the rain falls for 182.4 days and collects up to 36.77" (934mm) of precipitation.Snowfall
In Black Diamond, Washington, snow does not fall in May through October.Daylight
In May, the average length of the day in Black Diamond, Washington, is 15h and 8min.On the first day of the month, sunrise is at 5:49 am and sunset at 8:20 pm. On the last day of May, sunrise is at 5:15 am and sunset at 8:56 pm PDT.
Sunshine
In Black Diamond, the average sunshine in May is 8.8h.UV index
In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 4 in May suggests the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Black Diamond in May?
What is the average humidity in May in Black Diamond?
How many days does it rain in May in Black Diamond?
When it does not snow in Black Diamond?
Does it snow in Black Diamond in May?
How many hours of daylight does Black Diamond have in May?
When is the sunrise / sunset in May in Black Diamond?
How many hours of sunshine does Black Diamond have in May?
How high is the UV index in May in Black Diamond?
Average temperature in May
Black Diamond, WA
- Average high temperature in May: 62.2°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 May: 41.4°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 May
Black Diamond, WA
- Average pressure in May: 30.01"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 May
Black Diamond, WA
- Average wind speed in May: 3.8mph
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 May
Black Diamond, WA
- Average humidity in May: 77%
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 May
Black Diamond, WA
- Average rainfall in May: 1.97"
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 May
Black Diamond, WA
- Average rainfall days in May: 14.4 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 May
Black Diamond, WA
- Average snowfall in May: 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 May
Black Diamond, WA
- Average snowfall days in May: 0.1 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 May /
Average sunshine in May
Black Diamond, WA
- Average daylight in May: 15h and 1min
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 May: 8h and 5min
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 May
Black Diamond, WA
- Average sunshine days in May: 14.2 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 May
Black Diamond, WA
- Average UV index in May: 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 May
Black Diamond, WA
- Average cloud cover in May: 47
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 May
Black Diamond, WA
- Average visibility in May: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
Black Diamond, Washington, USA
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