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
Steilacoom's coldest temperatures are experienced in December, with average high temperatures of 43.7°F (6.5°C) and lows of 34.3°F (1.3°C).Humidity
January and December, with an average relative humidity of 87%, are the most humid months.Rainfall
The month with the most rainfall is December, when the rain falls for 18.4 days and typically aggregates up to 4.69" (119mm) of precipitation.Snowfall
Months with snowfall in Steilacoom are January through March, November and December. In Steilacoom, in December, snow falls for 1.3 days, with typically accumulated 0.31" (8mm) of snow. Throughout the year, in Steilacoom, there are 8.9 snowfall days, and 5.04" (128mm) of snow is accumulated.Daylight
The month with the shortest days in Steilacoom is December, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:56 am and sunset at 4:30 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4h of sunshine.UV index
The months with the lowest UV index in Steilacoom are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Boost your sun resistance with garments that are densely woven yet spacious. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest month in Steilacoom?
Is December cold in Steilacoom?
What is the most humid month in Steilacoom?
What is the average humidity in December in Steilacoom?
What is the rainiest month in Steilacoom?
How many days does it rain in December in Steilacoom?
How much does it snow in Steilacoom in December?
What is the month with the shortest days in Steilacoom?
What is the average length of the day in December in Steilacoom?
What time are sunrise and sunset in December in Steilacoom?
What is the month with the least sunshine in Steilacoom?
How long on average sun shines in December in Steilacoom?
When is the lowest UV index in Steilacoom?
What is the UV index reading in December in Steilacoom?
Average temperature in December
Steilacoom, WA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in December: 34.3°F
The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).
Average pressure in December
Steilacoom, WA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Steilacoom, WA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Steilacoom, WA
- Average humidity in December: 87%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (68%).
Average rainfall in December
Steilacoom, WA
- Average rainfall in December: 4.69"
The wettest month (with the highest rainfall) is December (4.69").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Steilacoom, WA
- Average rainfall days in December: 18.4 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (5 days).
Average snowfall in December
Steilacoom, WA
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Steilacoom, WA
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (3.2 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
Steilacoom, WA
- Average daylight in December: 8h 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 36min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in December
Steilacoom, WA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (9 days).
Average UV index in December
Steilacoom, 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
Steilacoom, WA
- Average cloud cover in December: 59
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Steilacoom, WA
- Average visibility in December: 5mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).
Steilacoom, Washington, USA
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