December weather forecastEast Renton Highlands, WA
December
Weather in December
The first month of the winter, December, is also an icy month in East Renton Highlands, Washington, with an average temperature fluctuating between 42.3°F (5.7°C) and 33.4°F (0.8°C).Temperature
December, on average, is the coldest month, registering a high temperature of 42.3°F (5.7°C) and a low of 33.4°F (0.8°C).Humidity
The months with the highest humidity in East Renton Highlands are January, February and December, with an average relative humidity of 85%.Rainfall
December is the month with the most rainfall. Rain falls for 18.5 days and accumulates 5.12" (130mm) of precipitation.Snowfall
Months with snowfall in East Renton Highlands are January through April, November and December. In East Renton Highlands, in December, snow falls for 2.3 days, with typically accumulated 0.75" (19mm) of snow. Throughout the year, there are 13.6 snowfall days, and 7.6" (193mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 30min of daylight.On the first day of December in East Renton Highlands, sunrise is at 7:36 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:27 pm PST.
Sunshine
With an average of 4h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index in East Renton Highlands are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
East Renton Highlands, WA
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in December: 33.4°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (33.4°F).
Average pressure in December
East Renton Highlands, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
East Renton Highlands, WA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in December
East Renton Highlands, WA
- Average humidity in December: 85%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
East Renton Highlands, WA
- Average rainfall in December: 5.12"
The wettest month (with the highest rainfall) is December (5.12").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
East Renton Highlands, WA
- Average rainfall days in December: 18.5 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (6.2 days).
Average snowfall in December
East Renton Highlands, WA
- Average snowfall in December: 0.75"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
East Renton Highlands, WA
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
East Renton Highlands, 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: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in December
East Renton Highlands, WA
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in December
East Renton Highlands, 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 Renton Highlands, WA
- Average cloud cover in December: 58
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
East Renton Highlands, WA
- Average visibility in December: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
