December weather forecastFall City, WA
December
Weather in December
December, the first month of the winter in Fall City, is still a cold month, with an average temperature varying between 39.7°F (4.3°C) and 29.8°F (-1.2°C).Temperature
In Fall City, the month of December registers the lowest temperatures, averaging 39.7°F (4.3°C) at the peak and 29.8°F (-1.2°C) at the lowest.Humidity
In December, the average relative humidity is 86%.Rainfall
In Fall City, in December, it is raining for 18.5 days, with typically 6.06" (154mm) of accumulated precipitation. In Fall City, during the entire year, the rain falls for 184.9 days and collects up to 39.96" (1015mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Fall City. In Fall City, in December, snow falls for 3.7 days, with typically accumulated 1.61" (41mm) of snow. Throughout the year, there are 17.4 snowfall days, and 11.38" (289mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:35 am and sunset at 4:18 pm. On the last day of December, in Fall City, sunrise is at 7:55 am and sunset at 4:26 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 3.9h of sunshine.UV index
The average daily maximum UV index in December in Fall City, Washington, is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fall City, WA
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (39.7°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (29.8°F).
Average pressure in December
Fall City, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in December
Fall City, WA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in December
Fall City, WA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
Fall City, WA
- Average rainfall in December: 6.06"
The wettest month (with the highest rainfall) is January (6.1").
The driest months (with the least rainfall) are July and August (0.59").
Average rainfall days in December
Fall City, WA
- Average rainfall days in December: 18.5 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in December
Fall City, WA
- Average snowfall in December: 1.61"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Fall City, WA
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is February (5.4 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
Fall City, WA
- Average daylight in December: 8h and 30min
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 30min).
- Average sunshine in December: 3h and 54min
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: 3h and 54min).
Average sunshine days in December
Fall City, WA
- Average sunshine days in December: 10 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Fall City, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Fall City, 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
Fall City, WA
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
