December weather forecastClyde Hill, WA
December
Weather in December
December, the first month of the winter in Clyde Hill, is also a frosty month, with an average temperature ranging between min 34.7°F (1.5°C) and max 42.8°F (6°C).Temperature
December tends to be the coldest month, with temperatures averaging a daily high of 42.8°F (6°C) and a low of 34.7°F (1.5°C).Humidity
In Clyde Hill, the average relative humidity in December is 84%.Rainfall
December is the month with the most rainfall. Rain falls for 12.5 days and accumulates 2.01" (51mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Clyde Hill, during December, snow falls for 1.1 days and regularly aggregates up to 0.31" (8mm) of snow. Throughout the year, there are 7 snowfall days, and 3.27" (83mm) of snow is accumulated.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year in Clyde Hill.On the first day of the month, sunrise is at 7:37 am and sunset at 4:19 pm. On the last day of December, sunrise is at 7:57 am and sunset at 4:27 pm PST.
Sunshine
December has the least sunshine of the year in Clyde Hill, with an average of 4.2h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Clyde Hill. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Clyde Hill, WA
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (42.8°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is August (53.4°F).
The coldest month (with the lowest average low temperature) is February (34.5°F).
Average pressure in December
Clyde Hill, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Clyde Hill, WA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in December
Clyde Hill, WA
- Average humidity in December: 84%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Clyde Hill, WA
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is December (2.01").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Clyde Hill, WA
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in December
Clyde Hill, WA
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Clyde Hill, WA
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Clyde Hill, WA
- 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 December: 4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in December
Clyde Hill, WA
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is August (24.9 days).
The month with the least sunshine days is February (13.8 days).
Average UV index in December
Clyde Hill, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Clyde Hill, WA
- Average cloud cover in December: 56
The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Clyde Hill, WA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
