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 is the month that records the lowest temperatures, with averages ranging from a high of 37°F (2.8°C) to a low of 25.7°F (-3.5°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 78.5 rainfall days, and 5.16" (131mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, September, November and December. In Donald, during December, snow falls for 3.5 days and regularly aggregates up to 1.57" (40mm) of snow. Throughout the year, there are 12.8 snowfall days, and 5.35" (136mm) of snow is accumulated.Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year.On the first day of December in Donald, sunrise is at 7:25 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:24 pm PST.
Sunshine
The average sunshine in December is 5.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Experience reduced UV exposure by about half when donning a wide-brim hat. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is it in December?
What is the average humidity in December?
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?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Donald, WA
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is August (61.2°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in December
Donald, WA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in December
Donald, WA
- Average wind speed in December: 4.6mph
The windiest months (with the highest average wind speed) are April and June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.6mph).
Average humidity in December
Donald, WA
- Average humidity in December: 79%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in December
Donald, WA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is January (0.83").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Donald, WA
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is July (2.1 days).
Average snowfall in December
Donald, WA
- Average snowfall in December: 1.57"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in December
Donald, WA
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (3.9 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
Donald, 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 42min).
- Average sunshine in December: 5h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in December
Donald, WA
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is February (17.9 days).
Average UV index in December
Donald, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Donald, WA
- Average cloud cover in December: 37
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Donald, WA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Donald, Washington, USA
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