December weather forecastEast Olympia, WA
December
Weather in December
The first month of the winter, December, is also a frosty month in East Olympia, Washington, with temperature in the range of an average low of 33.4°F (0.8°C) and an average high of 43°F (6.1°C).Temperature
December, noted for its average high-temperature of 43°F (6.1°C) and an average low-temperature of 33.4°F (0.8°C), is considered the coldest month.Humidity
January, November and December, with an average relative humidity of 89%, are the most humid months in East Olympia.Rainfall
The month with the most rainfall is December, when the rain falls for 18.8 days and typically aggregates up to 5.79" (147mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in East Olympia. In East Olympia, Washington, during December, snow falls for 1.4 days and regularly aggregates up to 0.31" (8mm) of snow. In East Olympia, during the entire year, snow falls for 8.7 days and aggregates up to 5.31" (135mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of December in East Olympia, Washington, sunrise is at 7:37 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:32 pm PST.
Sunshine
December has the least sunshine of the year in East Olympia, with an average of 3.4h of sunshine.UV index
The months with the lowest UV index in East Olympia 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 unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 2 in December translates into this advice:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
East Olympia, WA
- Average high temperature in December: 43°F
The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (43°F).
- Average low temperature in December: 33.4°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 (33.4°F).
Average pressure in December
East Olympia, WA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in December
East Olympia, WA
- Average wind speed in December: 4.2mph
The windiest months (with the highest average wind speed) are March and November (4.6mph).
The calmest month (with the lowest average wind speed) is September (3.8mph).
Average humidity in December
East Olympia, WA
- Average humidity in December: 89%
The months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
East Olympia, WA
- Average rainfall in December: 5.79"
The wettest month (with the highest rainfall) is December (5.79").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
East Olympia, WA
- Average rainfall days in December: 18.8 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is August (5.5 days).
Average snowfall in December
East Olympia, WA
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
East Olympia, WA
- Average snowfall days in December: 1.4 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
East Olympia, 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: 3h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in December
East Olympia, WA
- Average sunshine days in December: 9.8 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in December
East Olympia, 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
East Olympia, WA
- Average cloud cover in December: 65
The months with the most cloud cover are January and December (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in December
East Olympia, WA
- Average visibility in December: 4mi
The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (4mi).
