Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The shift into April is accompanied by a modest temperature increase, with the average high-temperature edging up from a frosty 47.8°F (8.8°C) in March to a fresh 53.2°F (11.8°C). During the month of April, Black Diamond anticipates a mean low-temperature of 36.7°F (2.6°C).Humidity
In April, the average relative humidity is 82%.Rainfall
In Black Diamond, in April, during 18.5 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. Throughout the year, in Black Diamond, Washington, there are 182.4 rainfall days, and 36.77" (934mm) of precipitation is accumulated.Snowfall
Months with snowfall in Black Diamond are January through April, November and December. April is the last month it regularly snows. During 1.1 snowfall days, in April, Black Diamond aggregates 0.31" (8mm) of snow. Throughout the year, in Black Diamond, there are 19.7 snowfall days, and 11.5" (292mm) of snow is accumulated.Daylight
In Black Diamond, the average length of the day in April is 13h and 40min.On the first day of April, sunrise is at 6:44 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:18 pm PDT.
Sunshine
In April, the average sunshine is 7.5h.UV index
In April, the average daily maximum UV index in Black Diamond is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 3 during April translates into the following directions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Black Diamond?
What is the average humidity in April in Black Diamond?
How much does it rain in Black Diamond in April?
What is the last month it snows in Black Diamond?
What is the average length of the day in April in Black Diamond?
When are sunrise and sunset in April in Black Diamond?
How many hours of sunshine does Black Diamond have in April?
What is the UV index intensity in April in Black Diamond?
Average temperature in April
Black Diamond, WA
- Average high temperature in April: 53.2°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 April: 36.7°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 April
Black Diamond, WA
- Average pressure in April: 30.04"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 April
Black Diamond, WA
- Average wind speed in April: 4.2mph
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 April
Black Diamond, WA
- Average humidity in April: 82%
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 April
Black Diamond, WA
- Average rainfall in April: 2.95"
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 April
Black Diamond, WA
- Average rainfall days in April: 18.5 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 April
Black Diamond, WA
- Average snowfall in April: 0.31"
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 April
Black Diamond, WA
- Average snowfall days in April: 1.1 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 April /
Average sunshine in April
Black Diamond, WA
- Average daylight in April: 13h and 4min
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 April: 7h and 3min
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 April
Black Diamond, WA
- Average sunshine days in April: 9.3 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 April
Black Diamond, WA
- Average UV index in April: 3
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 April
Black Diamond, WA
- Average cloud cover in April: 55
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 April
Black Diamond, WA
- Average visibility in April: 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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