December weather forecastKapowsin, WA
December
Weather in December
The first month of the winter, December, is also a wintry month in Kapowsin, Washington, with an average temperature fluctuating between 41.2°F (5.1°C) and 31.1°F (-0.5°C).Temperature
December, noted for its average high-temperature of 41.2°F (5.1°C) and an average low-temperature of 31.1°F (-0.5°C), is considered the coldest month.Humidity
In Kapowsin, the average relative humidity in December is 87%.Rainfall
December is the month with the most rainfall. Rain falls for 18.6 days and accumulates 5.71" (145mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Kapowsin, in December, during 3.8 snowfall days, 1.54" (39mm) of snow is typically accumulated. In Kapowsin, during the entire year, snow falls for 20.4 days and aggregates up to 13.62" (346mm) 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, sunrise is at 7:34 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 4:30 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4.1h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In December, the UV index of 2 transforms into the following advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kapowsin, WA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is August (75°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (31.1°F).
Average pressure in December
Kapowsin, 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
Kapowsin, WA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Kapowsin, WA
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Kapowsin, WA
- Average rainfall in December: 5.71"
The wettest month (with the highest rainfall) is December (5.71").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Kapowsin, WA
- Average rainfall days in December: 18.6 days
The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in December
Kapowsin, WA
- Average snowfall in December: 1.54"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Kapowsin, WA
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is February (6 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Kapowsin, 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: 4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Kapowsin, WA
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is February (8 days).
Average UV index in December
Kapowsin, 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
Kapowsin, WA
- Average cloud cover in December: 57
The months with the most cloud cover are January, February, March and December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Kapowsin, WA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
