December weather forecastRyderwood, WA
December
Weather in December
The first month of the winter, December, is also a wintry month in Ryderwood, Washington, with an average temperature ranging between min 32.7°F (0.4°C) and max 42.3°F (5.7°C).Temperature
Ryderwood's December weather, marked by an average high temperature of 42.3°F (5.7°C) and an average low temperature of 32.7°F (0.4°C), is the coldest in the year.Humidity
In Ryderwood, the average relative humidity in December is 88%.Rainfall
In Ryderwood, Washington, during December, the rain falls for 19.8 days and regularly aggregates up to 4.8" (122mm) of precipitation. Throughout the year, in Ryderwood, there are 188.7 rainfall days, and 33.54" (852mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Ryderwood, Washington, during December, snow falls for 0.9 days and regularly aggregates up to 0.31" (8mm) of snow. Throughout the year, in Ryderwood, there are 7.5 snowfall days, and 4.45" (113mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:35 am and sunset at 4:27 pm. On the last day of December, in Ryderwood, sunrise is at 7:55 am and sunset at 4:35 pm PST.
Sunshine
February and December, with an average of 3.6h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Ryderwood are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: In December, the UV index of 2 transforms into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ryderwood, WA
- Average high temperature in December: 42.3°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 (42.3°F).
- Average low temperature in December: 32.7°F
The month with the highest average low temperature is August (49.3°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure in December
Ryderwood, 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
Ryderwood, WA
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in December
Ryderwood, WA
- Average humidity in December: 88%
The months with the highest relative humidity are February and November (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Ryderwood, WA
- Average rainfall in December: 4.8"
The wettest month (with the highest rainfall) is January (5.12").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Ryderwood, WA
- Average rainfall days in December: 19.8 days
The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is July (7.4 days).
Average snowfall in December
Ryderwood, WA
- Average snowfall in December: 0.31"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Ryderwood, WA
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Ryderwood, WA
- Average daylight in December: 8h and 42min
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: 3h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The months with the least sunshine are February and December (Average sunshine: 3h and 36min).
Average sunshine days in December
Ryderwood, WA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is August (20.6 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Ryderwood, WA
- Average UV index in December: 2
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 2).
Average cloud cover in December
Ryderwood, WA
- Average cloud cover in December: 63
The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Ryderwood, WA
- Average visibility in December: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
