December weather forecastDulwich, WA
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Dulwich, Washington, with an average temperature fluctuating between 28.9°F (-1.7°C) and 16.9°F (-8.4°C).Temperature
The coldest period tends to be December, when average temperatures fluctuate between a high of 28.9°F (-1.7°C) and a low of 16.9°F (-8.4°C).Humidity
The average relative humidity in December in Dulwich, Washington, is 91%.Rainfall
In Dulwich, in December, it is raining for 11.7 days, with typically 1.61" (41mm) of accumulated precipitation. In Dulwich, during the entire year, the rain falls for 156.3 days and collects up to 16.18" (411mm) of precipitation.Snowfall
January through April, September through December are months with snowfall in Dulwich. In Dulwich, in December, during 13.7 snowfall days, 6.5" (165mm) of snow is typically accumulated. Throughout the year, there are 53.2 snowfall days, and 25.16" (639mm) of snow is accumulated.Daylight
The month with the shortest days in Dulwich is December, with an average of 8h and 18min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 3:58 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:06 pm PST.
Sunshine
In Dulwich, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 1 translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dulwich, WA
- Average high temperature in December: 28.9°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (28.9°F).
- Average low temperature in December: 16.9°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is February (16°F).
Average pressure in December
Dulwich, WA
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in December
Dulwich, WA
- Average wind speed in December: 3mph
The windiest month (with the highest average wind speed) is April (3.9mph).
The calmest months (with the lowest average wind speed) are January, February and December (3mph).
Average humidity in December
Dulwich, WA
- Average humidity in December: 91%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (50%).
Average rainfall in December
Dulwich, WA
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in December
Dulwich, WA
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is March (18.4 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in December
Dulwich, WA
- Average snowfall in December: 6.5"
The month with the highest snowfall is January (6.61").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in December
Dulwich, WA
- Average snowfall days in December: 13.7 days
The month with the highest number of snowfall days is December (13.7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Dulwich, WA
- Average daylight in December: 8h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Dulwich, WA
- Average sunshine days in December: 12.3 days
The month with the most sunshine days is August (20.8 days).
The month with the least sunshine days is March (9 days).
Average UV index in December
Dulwich, WA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Dulwich, WA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Dulwich, 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 (2mi).
