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
The month of December, characterized by an average high of 43.7°F (6.5°C) and a low of 34.3°F (1.3°C), is recognized as the coldest.Humidity
January and December, with an average relative humidity of 87%, are the most humid months.Rainfall
The month with the most rainfall in Spanaway is December, when the rain falls for 18.9 days and typically aggregates up to 4.76" (121mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Spanaway, in December, snow falls for 1.5 days, with typically accumulated 0.35" (9mm) of snow. Throughout the year, there are 9.4 snowfall days, and 4.84" (123mm) of snow is accumulated.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year in Spanaway.On the first day of December in Spanaway, Washington, sunrise is at 7:36 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:30 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 4h 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 Spanaway. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the coldest time of year in Spanaway?
Is it cold in Spanaway during December?
What are the most humid months in Spanaway?
What is the average humidity in December in Spanaway?
What is the wettest month in Spanaway?
How much does it rain in Spanaway in December?
How much does it snow in Spanaway in December?
What is the month with the shortest days in Spanaway?
What is the average length of the day in December in Spanaway?
What time are sunrise and sunset in December in Spanaway?
What is the month with the least sunshine in Spanaway?
How long on average sun shines in December in Spanaway?
What are the months with the lowest UV index in Spanaway?
What is the UV index intensity in December in Spanaway?
Average temperature in December
Spanaway, WA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is August (78.4°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 (52.5°F).
The coldest month (with the lowest average low temperature) is February (34.2°F).
Average pressure in December
Spanaway, 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
Spanaway, 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
Spanaway, 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 (69%).
Average rainfall in December
Spanaway, WA
- Average rainfall in December: 4.76"
The wettest month (with the highest rainfall) is December (4.76").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Spanaway, WA
- Average rainfall days in December: 18.9 days
The month with the highest number of rainy days is March (19.9 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in December
Spanaway, WA
- Average snowfall in December: 0.35"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Spanaway, WA
- Average snowfall days in December: 1.5 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
Spanaway, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
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
Spanaway, WA
- Average sunshine days in December: 10.1 days
The month with the most sunshine days is August (23.3 days).
The months with the least sunshine days are February and March (9 days).
Average UV index in December
Spanaway, 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
Spanaway, WA
- Average cloud cover in December: 58
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Spanaway, WA
- Average visibility in December: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
Spanaway, Washington, USA
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