Climate and monthly weather forecastBlack Diamond, WA
Climate and monthly weather forecast
Weather in January
January, like December, in Black Diamond, Washington, is an icy winter month, with temperature in the range of an average low of 32.7°F (0.4°C) and an average high of 42.4°F (5.8°C). As Black Diamond transitions from December to January, the average high-temperatures adjust to a still icy 42.4°F (5.8°C), nearly the same as the previous 40.8°F (4.9°C). Weather in January »Weather in February
The last month of the winter, February, is a frosty month in Black Diamond, Washington, with an average temperature ranging between min 31.6°F (-0.2°C) and max 43.3°F (6.3°C). Black Diamond experiences a transition to a chilly 43.3°F (6.3°C) in average high-temperatures with the arrival of February, not greatly differing from January's 42.4°F (5.8°C). Weather in February »Weather in March
March, the first month of the spring in Black Diamond, is still a chilly month, with an average temperature ranging between min 33.4°F (0.8°C) and max 47.8°F (8.8°C). Welcoming March, Black Diamond notes an average high-temperature of a still chilly 47.8°F (8.8°C), nearly consistent with February's 43.3°F (6.3°C). Weather in March »Weather in April
April in Black Diamond, Washington, is a cool spring month, with an average temperature varying between 53.2°F (11.8°C) and 36.7°F (2.6°C). 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). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Black Diamond, Washington, with an average temperature ranging between min 41.4°F (5.2°C) and max 62.2°F (16.8°C). 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). Weather in May »Weather in June
The first month of the summer, June, is still a comfortable month in Black Diamond, Washington, with temperature in the range of an average high of 67.1°F (19.5°C) and an average low of 44.2°F (6.8°C). The shift into June reveals an average high-temperature of a still comfortable 67.1°F (19.5°C), closely mirroring May's climate. Weather in June »Weather in July
July is a moderately hot summer month in Black Diamond, Washington, with an average temperature varying between 48.7°F (9.3°C) and 74.7°F (23.7°C). July witnesses a minor rise in the average high-temperature, transitioning from a comfortable 67.1°F (19.5°C) in June to a warm 74.7°F (23.7°C). Weather in July »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). 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). Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Black Diamond, Washington, with an average temperature varying between 47.3°F (8.5°C) and 68.4°F (20.2°C). The shift from August to September coincides with a small decrease in the average high-temperature, down to a pleasant 68.4°F (20.2°C) from a moderately hot 75.4°F (24.1°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Black Diamond, Washington, with an average temperature varying between 41.9°F (5.5°C) and 57.2°F (14°C). The transition into October involves a decrease in the average high-temperature, falling from an agreeable 68.4°F (20.2°C) in September to a mild 57.2°F (14°C). Weather in October »Weather in November
November, the last month of the autumn in Black Diamond, is another chilly month, with an average temperature ranging between min 36.3°F (2.4°C) and max 46.8°F (8.2°C). A change in temperatures is noted as October gives way to November, with average highs reducing from a moderate 57.2°F (14°C) to a frosty 46.8°F (8.2°C). Weather in November »Weather in December
December, the first month of the winter in Black Diamond, is still a cold month, with an average temperature ranging between max 40.8°F (4.9°C) and min 32°F (0°C). December, characterized by an average high temperature of 40.8°F (4.9°C) and a low temperature of 32°F (0°C), is generally the coldest month. Weather in December »Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The months with the highest humidity in Black Diamond, Washington, are January and February, with an average relative humidity of 86%.
In Black Diamond, during the entire year, the rain falls for 182.4 days and collects up to 36.77" (934mm) of precipitation.
January through April, November and December are months with snowfall.
Throughout the year, in Black Diamond, Washington, there are 19.7 snowfall days, and 11.5" (292mm) of snow is accumulated.
The months with the least sunshine are January and December, with an average of 4.1h of sunshine.
The month with the most snowfall in Black Diamond is February, when snow falls for 6 days and typically aggregates up to 4.17" (106mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Black Diamond, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
May through October are months without snowfall in Black Diamond, Washington.
June has the longest days of the year in Black Diamond, Washington, with an average of 15h and 54min of daylight.
The least humid month is July, with an average relative humidity of 70%.
July is the month with the least rainfall in Black Diamond, Washington. Rain falls for 7.9 days and accumulates 0.59" (15mm) of precipitation.
With an average maximum UV index of 5, July is the month with the highest UV index in Black Diamond.
The temperatures reach their highest averages in August, with highs of 75.4°F (24.1°C) and lows of 50.2°F (10.1°C).
August has the most sunshine of the year in Black Diamond, with an average of 10.7h of sunshine.
The month with the lowest UV index in Black Diamond is November, with an average maximum UV index of 1.
Black Diamond's temperature records reveal December as the coldest month, marked by average highs of 40.8°F (4.9°C) and lows of 32°F (0°C).
The month with the most rainfall in Black Diamond, Washington, is December, when the rain falls for 18.7 days and typically aggregates up to 5.43" (138mm) of precipitation.
With an average of 8h and 30min of daylight, December has the shortest days of the year in Black Diamond.
Average temperature
Black Diamond, WA
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).
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
Black Diamond, WA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.04"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
30.01"Hg
- Average pressure in July:
30.02"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.09"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
Black Diamond, WA
- Average wind speed in January:
5.2mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.7mph - Average wind speed in April:
4.2mph - Average wind speed in May:
3.8mph - Average wind speed in June:
3.7mph
- Average wind speed in July:
3.6mph - Average wind speed in August:
3.5mph - Average wind speed in September:
3.7mph - Average wind speed in October:
4.2mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.8mph
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
Black Diamond, WA
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is July (70%).
Average rainfall
Black Diamond, WA
- Average rainfall in January:
5.31" - Average rainfall in February:
3.9" - Average rainfall in March:
4.17" - Average rainfall in April:
2.95" - Average rainfall in May:
1.97" - Average rainfall in June:
1.57"
- Average rainfall in July:
0.59" - Average rainfall in August:
0.71" - Average rainfall in September:
1.73" - Average rainfall in October:
3.9" - Average rainfall in November:
4.53" - Average rainfall in December:
5.43"
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
Black Diamond, WA
- Average rainfall days in January:
18.2 days - Average rainfall days in February:
16.5 days - Average rainfall days in March:
20.5 days - Average rainfall days in April:
18.5 days - Average rainfall days in May:
14.4 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
7.9 days - Average rainfall days in August:
6.7 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
16.5 days - Average rainfall days in November:
19.1 days - Average rainfall days in December:
18.7 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
Black Diamond, WA
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
Black Diamond, WA
- Average snowfall days in January:
3.3 days - Average snowfall days in February:
6 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
0 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
3.9 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 / Average sunshine
Black Diamond, WA
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 18min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 6min - Average daylight in June:
15h and 54min
- Average daylight in July:
15h and 30min - Average daylight in August:
14h and 12min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 18min - Average daylight in December:
8h and 30min
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 January:
4h and 6min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 42min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 42min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 24min - Average sunshine in November:
4h and 24min - Average sunshine in December:
4h and 6min
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
Black Diamond, WA
- Average sunshine days in January:
10.5 days - Average sunshine days in February:
8.4 days - Average sunshine days in March:
9.1 days - Average sunshine days in April:
9.3 days - Average sunshine days in May:
14.2 days - Average sunshine days in June:
14.2 days
- Average sunshine days in July:
21.5 days - Average sunshine days in August:
22 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
13.1 days - Average sunshine days in November:
9.5 days - Average sunshine days in December:
10.3 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
Black Diamond, WA
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
Black Diamond, WA
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
Black Diamond, WA
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
