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 29.7°F (-1.3°C) and a low of 18.3°F (-7.6°C), is recognized as the coldest in Cle Elum.Humidity
In Cle Elum, the average relative humidity in December is 91%.Rainfall
In December, in Cle Elum, the rain falls for 12.1 days. Throughout December, 4.17" (106mm) of precipitation is accumulated. In Cle Elum, during the entire year, the rain falls for 161.2 days and collects up to 28.46" (723mm) of precipitation.Snowfall
Months with snowfall in Cle Elum are January through May, September through December. In Cle Elum, in December, snow falls for 15.1 days, with typically accumulated 15.24" (387mm) of snow. Throughout the year, there are 69.9 snowfall days, and 60.24" (1530mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 36min of daylight.On the first day of December in Cle Elum, sunrise is at 7:30 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:24 pm PST.
Sunshine
In December, the average sunshine is 3.7h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Cle Elum?
How cold is December in Cle Elum?
What is the average humidity in December in Cle Elum?
How much does it rain in Cle Elum in December?
How many days does it snow in December in Cle Elum?
What is the month with the shortest days in Cle Elum?
What is the average length of the day in December in Cle Elum?
When is the sunrise / sunset in December in Cle Elum?
How long on average sun shines in December in Cle Elum?
What is the month with the lowest UV index in Cle Elum?
What is the UV index intensity in December in Cle Elum?
Average temperature in December
Cle Elum, WA
- Average high temperature in December: 29.7°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (18.3°F).
Average pressure in December
Cle Elum, WA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in December
Cle Elum, WA
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is June (6.7mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in December
Cle Elum, WA
- Average humidity in December: 91%
The months with the highest relative humidity are January and February (92%).
The months with the lowest relative humidity are July and August (60%).
Average rainfall in December
Cle Elum, WA
- Average rainfall in December: 4.17"
The wettest month (with the highest rainfall) is January (4.41").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Cle Elum, WA
- Average rainfall days in December: 12.1 days
The months with the highest number of rainy days are March and April (18.3 days).
The month with the least rainy days is August (5.5 days).
Average snowfall in December
Cle Elum, WA
- Average snowfall in December: 15.24"
The month with the highest snowfall is January (16.3").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Cle Elum, WA
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is December (15.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Cle Elum, WA
- Average daylight in December: 8h and 4min
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 36min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Cle Elum, WA
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in December
Cle Elum, WA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Cle Elum, WA
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in December
Cle Elum, WA
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (3mi).
Cle Elum, Washington, USA
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