Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With average high and low temperatures of 38.3°F (3.5°C) and 27.9°F (-2.3°C) respectively, December is Kennewick's coldest month.Humidity
In December, the average relative humidity in Kennewick is 78%.Rainfall
The months with the most rainfall are March and December, with an average 0.94" (24mm) of precipitation.Snowfall
Months with snowfall in Kennewick are January through March, November and December. In Kennewick, in December, snow falls for 3.1 days, with typically accumulated 1.57" (40mm) of snow. In Kennewick, during the entire year, snow falls for 9.7 days and aggregates up to 5.2" (132mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December in Kennewick, Washington, sunrise is at 7:19 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:20 pm PST.
Sunshine
In Kennewick, the average sunshine in December is 5.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What is the coldest time of year in Kennewick?
How cold is it in Kennewick in December?
What is the average humidity in December in Kennewick?
What is the rainiest month in Kennewick?
How much does it rain in Kennewick in December?
How many days does it snow in December in Kennewick?
What is the month with the shortest days in Kennewick?
What is the average length of the day in December in Kennewick?
When is the sunrise / sunset in December in Kennewick?
How many hours of sunshine does Kennewick have in December?
What is the month with the lowest UV index in Kennewick?
What is the UV index intensity in December in Kennewick?
Average temperature in December
Kennewick, WA
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).
Average pressure in December
Kennewick, WA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Kennewick, WA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).
Average humidity in December
Kennewick, WA
- Average humidity in December: 78%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (35%).
Average rainfall in December
Kennewick, WA
- Average rainfall in December: 0.94"
The wettest months (with the highest rainfall) are March and December (0.94").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in December
Kennewick, WA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in December
Kennewick, WA
- Average snowfall in December: 1.57"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Kennewick, WA
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is December (3.1 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
Kennewick, WA
- Average daylight in December: 8h and 4min
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: 5h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Kennewick, WA
- Average sunshine days in December: 16 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in December
Kennewick, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Kennewick, WA
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in December
Kennewick, WA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Kennewick, Washington, USA
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