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
Chinook's coldest month, December, registers temperatures that range from a high of 46.8°F (8.2°C) to a low of 41.5°F (5.3°C).Humidity
In Chinook, the average relative humidity in December is 81%.Rainfall
The month with the most rainfall is December, when the rain falls for 17.9 days and typically aggregates up to 3.31" (84mm) of precipitation.Snowfall
March through August, October through December are months without snowfall.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:39 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:58 am and sunset at 4:39 pm PST.
Sunshine
In Chinook, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
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. To guard against the harmful effects of the Sun, minimize exposure during midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
What is the usual temperature for Chinook in December?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
When it does not snow?
Does it snow in Chinook in December?
What is the month with the shortest days?
How many hours of daylight does Chinook have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Chinook have in December?
What are the months with the lowest UV index in Chinook?
What is the UV index reading in December?
Average temperature in December
Chinook, WA
- Average high temperature in December: 46.8°F
The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).
- Average low temperature in December: 41.5°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).
Average pressure in December
Chinook, WA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in December
Chinook, WA
- Average wind speed in December: 11.3mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in December
Chinook, WA
- Average humidity in December: 81%
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is April (80%).
Average rainfall in December
Chinook, WA
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Chinook, WA
- Average rainfall days in December: 17.9 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in December
Chinook, WA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").
Average snowfall days in December
Chinook, WA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Chinook, 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: 4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Chinook, WA
- Average sunshine days in December: 11.1 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index in December
Chinook, WA
- Average UV index in December: 2
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in December
Chinook, WA
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in December
Chinook, 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).
Chinook, Washington, USA
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