December weather forecastNorth Yelm, WA
December
Weather in December
The first month of the winter, December, is also a frosty month in North Yelm, Washington, with an average temperature fluctuating between 43°F (6.1°C) and 32.9°F (0.5°C).Temperature
In North Yelm, December is the coldest month, with temperatures averaging a high of 43°F (6.1°C) and a low of 32.9°F (0.5°C).Humidity
January, February, November and December, with an average relative humidity of 87%, are the most humid months in North Yelm, Washington.Rainfall
December is the month with the most rainfall. Rain falls for 18.9 days and accumulates 5.28" (134mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in North Yelm. In North Yelm, in December, during 1.1 snowfall days, 0.2" (5mm) of snow is typically accumulated. Throughout the year, in North Yelm, there are 9 snowfall days, and 6.38" (162mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:55 am and sunset at 4:31 pm PST.
Sunshine
The months with the least sunshine in North Yelm are January and December, with an average of 4h of sunshine.UV index
The months with the lowest UV index in North Yelm are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
North Yelm, WA
- Average high temperature in December: 43°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (43°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in December
North Yelm, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in December
North Yelm, WA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
North Yelm, WA
- Average humidity in December: 87%
The months with the highest relative humidity are January, February, November and December (87%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
North Yelm, WA
- Average rainfall in December: 5.28"
The wettest month (with the highest rainfall) is December (5.28").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
North Yelm, WA
- Average rainfall days in December: 18.9 days
The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (5.3 days).
Average snowfall in December
North Yelm, WA
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
North Yelm, WA
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
North Yelm, WA
- Average daylight in December: 8h and 36min
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: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).
Average sunshine days in December
North Yelm, WA
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is August (23.4 days).
The months with the least sunshine days are February and March (8.8 days).
Average UV index in December
North Yelm, 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
North Yelm, WA
- Average cloud cover in December: 59
The months with the most cloud cover are January, February, March and December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
North Yelm, WA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
