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
December stands out as Mirrormont's coldest month, with temperatures ranging between an average high of 42.3°F (5.7°C) and a low of 33.4°F (0.8°C).Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 85%.Rainfall
December is the month with the most rainfall. Rain falls for 18.5 days and accumulates 5.12" (130mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 2.3 days. Throughout December, 0.75" (19mm) of snow is accumulated. In Mirrormont, during the entire year, snow falls for 13.6 days and aggregates up to 7.6" (193mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year in Mirrormont, Washington.On the first day of the month, sunrise is at 7:35 am and sunset at 4:19 pm. On the last day of December, sunrise is at 7:55 am and sunset at 4:27 pm PST.
Sunshine
With an average of 4h 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 low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
How cold is December?
What are the most humid months?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Mirrormont, WA
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in December: 33.4°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (33.4°F).
Average pressure in December
Mirrormont, 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
Mirrormont, WA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in December
Mirrormont, WA
- Average humidity in December: 85%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Mirrormont, WA
- Average rainfall in December: 5.12"
The wettest month (with the highest rainfall) is December (5.12").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Mirrormont, WA
- Average rainfall days in December: 18.5 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (6.2 days).
Average snowfall in December
Mirrormont, WA
- Average snowfall in December: 0.75"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mirrormont, WA
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Mirrormont, 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 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in December
Mirrormont, WA
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in December
Mirrormont, WA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Mirrormont, 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
Mirrormont, 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).
Mirrormont, Washington, USA
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