December weather forecastNormandy Park, WA
December
Weather in December
The first month of the winter, December, is still a chilly month in Normandy Park, Washington, with an average temperature fluctuating between 43.5°F (6.4°C) and 34.3°F (1.3°C).Temperature
Normandy Park's December weather reaches an average high of 43.5°F (6.4°C) and an average low of 34.3°F (1.3°C), making it the coldest month.Humidity
January and December, with an average relative humidity of 85%, are the most humid months in Normandy Park.Rainfall
December is the month with the most rainfall. Rain falls for 13.5 days and accumulates 2.2" (56mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Normandy Park, during December, snow falls for 1.6 days and regularly aggregates up to 0.47" (12mm) of snow. In Normandy Park, during the entire year, snow falls for 9.8 days and aggregates up to 4.72" (120mm) of snow.Daylight
The month with the shortest days in Normandy Park is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 4:20 pm. On the last day of December, sunrise is at 7:56 am and sunset at 4:28 pm PST.
Sunshine
With an average of 4.1h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Normandy Park, WA
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in December: 34.3°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in December
Normandy Park, WA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Normandy Park, WA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).
Average humidity in December
Normandy Park, WA
- Average humidity in December: 85%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).
Average rainfall in December
Normandy Park, WA
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Normandy Park, WA
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).
Average snowfall in December
Normandy Park, WA
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Normandy Park, WA
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3.4 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
Normandy Park, 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 6min
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 6min).
Average sunshine days in December
Normandy Park, WA
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).
Average UV index in December
Normandy Park, WA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Normandy Park, WA
- Average cloud cover in December: 58
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Normandy Park, 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).
