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 readings reach their annual highs in December, averaging 36.5°F (2.5°C) and a minimum average of 24.8°F (-4°C).Humidity
In Clarkston, the average relative humidity in December is 83%.Rainfall
In December, in Clarkston, Washington, the rain falls for 11.7 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 116.2 rainfall days, and 8.23" (209mm) of precipitation is accumulated.Snowfall
Months with snowfall in Clarkston are January through March, October through December. In Clarkston, in December, snow falls for 4.4 days, with typically accumulated 1.06" (27mm) of snow. In Clarkston, during the entire year, snow falls for 14.8 days and aggregates up to 4.29" (109mm) of snow.Daylight
December has the shortest days of the year in Clarkston, Washington, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:03 pm. On the last day of December, in Clarkston, sunrise is at 7:31 am and sunset at 4:11 pm PST.
Sunshine
In December, the average sunshine is 5.3h.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 exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What part of the year is the coldest in Clarkston?
How cold is it in Clarkston in December?
What is the average humidity in December in Clarkston?
How many days does it rain in December in Clarkston?
How many days does it snow in December in Clarkston?
What is the month with the shortest days in Clarkston?
What is the average length of the day in December in Clarkston?
When is the sunrise / sunset in December in Clarkston?
How long on average sun shines in December in Clarkston?
When is the lowest UV index in Clarkston?
What is the UV index intensity in December in Clarkston?
Average temperature in December
Clarkston, WA
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is August (59.4°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).
Average pressure in December
Clarkston, WA
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Clarkston, WA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Clarkston, WA
- Average humidity in December: 83%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Clarkston, WA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is March (0.98").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in December
Clarkston, WA
- Average rainfall days in December: 11.7 days
The months with the highest number of rainy days are March and April (13.8 days).
The month with the least rainy days is August (4.5 days).
Average snowfall in December
Clarkston, WA
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Clarkston, WA
- Average snowfall days in December: 4.4 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 September (0 days).
Average daylight in December /
Average sunshine in December
Clarkston, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Clarkston, WA
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in December
Clarkston, 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
Clarkston, WA
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Clarkston, WA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Clarkston, Washington, USA
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