December weather forecastShelton, WA
December
Weather in December
Wrapping up the year, December fully embraces the winter season. The temperature plummets further, with lows reaching a chilly 32.9°F (0.5°C). It is also a time when snowfall makes a reappearance, albeit sparingly, dusting the ground with about 0.71" (18mm) of snow. The holiday season combined with this cold weather creates a festive and cosy atmosphere throughout Shelton. Amid the frosty weather, December radiates warmth through its festive spirit, tying a beautiful end to the weather cycle of the year.Temperature
With average temperatures fluctuating between a high of 41.5°F (5.3°C) and a low of 32.9°F (0.5°C), December stands out as the coldest month.Humidity
November and December, with an average relative humidity of 90%, are the most humid months.Rainfall
In December, the rain falls for 19.9 days. Throughout December, 7.17" (182mm) of precipitation is accumulated. Throughout the year, there are 185.4 rainfall days, and 42.87" (1089mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In December, it is snowing for 1.6 days. Throughout December, 0.71" (18mm) of snow is accumulated. Throughout the year, in Shelton, there are 9.1 snowfall days, and 5.59" (142mm) 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, sunrise is at 7:39 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:32 pm PST.
Sunshine
With an average of 3.5h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index in Shelton 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 radiation for the average person.Note: In December, the UV index of 2 transforms into the following advice:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Enhance your sun protection with tightly woven, yet airy clothing. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Shelton, WA
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is August (50.4°F).
The coldest month (with the lowest average low temperature) is February (32.7°F).
Average pressure in December
Shelton, WA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in December
Shelton, WA
- Average wind speed in December: 3.7mph
The windiest month (with the highest average wind speed) is March (4.3mph).
The calmest month (with the lowest average wind speed) is September (3.4mph).
Average humidity in December
Shelton, WA
- Average humidity in December: 90%
The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is July (72%).
Average rainfall in December
Shelton, WA
- Average rainfall in December: 7.17"
The wettest month (with the highest rainfall) is January (7.24").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Shelton, WA
- Average rainfall days in December: 19.9 days
The month with the highest number of rainy days is March (21.4 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in December
Shelton, WA
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Shelton, WA
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3.3 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
Shelton, WA
- Average daylight in December: 8h and 36min
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 30min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in December
Shelton, WA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is July (21.7 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in December
Shelton, 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
Shelton, WA
- Average cloud cover in December: 64
The months with the most cloud cover are January and December (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Shelton, WA
- Average visibility in December: 4mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (4mi).
