Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Federal Way, Washington, experiences its lowest temperatures in December, with an average peak of 42.6°F (5.9°C) and a low of 34.2°F (1.2°C).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 86%.Rainfall
The month with the most rainfall is December, when the rain falls for 18.2 days and typically aggregates up to 4.72" (120mm) of precipitation.Snowfall
Months with snowfall in Federal Way are January through April, November and December. In Federal Way, during December, snow falls for 2.1 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, in Federal Way, there are 13.3 snowfall days, and 7.01" (178mm) of snow is accumulated.Daylight
December has the shortest days of the year, 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, in Federal Way, Washington, sunrise is at 7:56 am and sunset at 4:29 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4.2h of sunshine.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 estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. It's recommended to limit sun exposure when its radiation is at its peak during midday. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest month in Federal Way?
How cold is December in Federal Way?
What is the most humid month in Federal Way?
What is the average humidity in December in Federal Way?
What is the wettest month in Federal Way?
How much does it rain in Federal Way in December?
How much does it snow in Federal Way in December?
What is the month with the shortest days in Federal Way?
What is the average length of the day in December in Federal Way?
When is the sunrise / sunset in December in Federal Way?
What is the month with the least sunshine in Federal Way?
How many hours of sunshine does Federal Way have in December?
When is the lowest UV index in Federal Way?
What is the UV index intensity in December in Federal Way?
Average temperature in December
Federal Way, WA
- Average high temperature in December: 42.6°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in December
Federal Way, WA
- Average pressure in December: 30.09"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
Federal Way, WA
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in December
Federal Way, WA
- Average humidity in December: 86%
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is July (68%).
Average rainfall in December
Federal Way, WA
- Average rainfall in December: 4.72"
The wettest month (with the highest rainfall) is December (4.72").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Federal Way, WA
- Average rainfall days in December: 18.2 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (5.9 days).
Average snowfall in December
Federal Way, WA
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Federal Way, WA
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is February (4.4 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
Federal Way, WA
- Average daylight in December: 8h and 3min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in December
Federal Way, WA
- Average sunshine days in December: 10.4 days
The month with the most sunshine days is August (22.8 days).
The months with the least sunshine days are February and November (8.5 days).
Average UV index in December
Federal Way, 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
Federal Way, WA
- Average cloud cover in December: 57
The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Federal Way, WA
- Average visibility in December: 5mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (5mi).
Federal Way, Washington, USA
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