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
Temperature records mark December as the coldest month, with highs averaging 45.1°F (7.3°C) and lows at 37.6°F (3.1°C).Humidity
The months with the highest humidity are November and December, with an average relative humidity of 87%.Rainfall
December is the month with the most rainfall. Rain falls for 20.3 days and accumulates 7.99" (203mm) of precipitation.Snowfall
In Grayland, snow does not fall in April through October and December.Daylight
December has the shortest days of the year in Grayland, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:41 am and sunset at 4:29 pm. On the last day of December, sunrise is at 8:01 am and sunset at 4:38 pm PST.
Sunshine
The average sunshine in December is 3.6h.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 of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
What are December temperatures?
What are the most humid months?
What is the average humidity in December in Grayland?
What is the wettest month?
How much does it rain in December?
When it does not snow?
Does it snow in December?
What is the month with the shortest days in Grayland?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Grayland, WA
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is August (69.4°F).
The month with the lowest average high temperature is December (45.1°F).
- Average low temperature in December: 37.6°F
The month with the highest average low temperature is August (52°F).
The coldest month (with the lowest average low temperature) is December (37.6°F).
Average pressure in December
Grayland, WA
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in December
Grayland, WA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is September (5.3mph).
Average humidity in December
Grayland, WA
- Average humidity in December: 87%
The months with the highest relative humidity are November and December (87%).
The month with the lowest relative humidity is July (79%).
Average rainfall in December
Grayland, WA
- Average rainfall in December: 7.99"
The wettest month (with the highest rainfall) is December (7.99").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Grayland, WA
- Average rainfall days in December: 20.3 days
The month with the highest number of rainy days is March (21.8 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in December
Grayland, WA
- Average snowfall in December: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in December
Grayland, WA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Grayland, 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: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Grayland, WA
- Average sunshine days in December: 9.1 days
The month with the most sunshine days is August (21.4 days).
The months with the least sunshine days are February and November (8 days).
Average UV index in December
Grayland, WA
- Average UV index in December: 2
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Grayland, WA
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Grayland, WA
- Average visibility in December: 5mi
The months with the highest visibility are March and April (6mi).
The month with the lowest visibility is August (4mi).
Grayland, Washington, USA
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