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
As Port Chilkoot steps into December, the average high-temperature holds at a still freezing cold 21.9°F (-5.6°C), hinting at a minor fluctuation from the prior month. Maintaining close parity with daytime warmth, the average nocturnal temperature during December stays at a still subzero cold 14.4°F (-9.8°C).Humidity
In December, the average relative humidity is 90%.Rainfall
In Port Chilkoot, in December, it is raining for 12.6 days, with typically 5.47" (139mm) of accumulated precipitation. In Port Chilkoot, during the entire year, the rain falls for 200.4 days and collects up to 48.03" (1220mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 17.1 days and accumulates 21.06" (535mm) of snow.Daylight
December has the shortest days of the year, with an average of 6h and 18min of daylight.On the first day of the month, sunrise is at 8:32 am and sunset at 3:10 pm. On the last day of December, sunrise is at 8:56 am and sunset at 3:13 pm AKST.
Sunshine
January and December, with an average of 3.7h of sunshine, are months with the least sunshine in Port Chilkoot.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
When does it snow the most?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Port Chilkoot?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Port Chilkoot have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Port Chilkoot, AK
- Average high temperature in December: 21.9°F
The warmest month (with the highest average high temperature) is July (56.5°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in December: 14.4°F
The month with the highest average low temperature is August (44.1°F).
The coldest month (with the lowest average low temperature) is February (12.4°F).
Average pressure in December
Port Chilkoot, AK
- Average pressure in December: 29.87"Hg
The month with the highest atmospheric pressure is July (30.01"Hg).
The month with the lowest atmospheric pressure is November (29.81"Hg).
Average wind speed in December
Port Chilkoot, AK
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is January (6.7mph).
The calmest month (with the lowest average wind speed) is May (4.7mph).
Average humidity in December
Port Chilkoot, AK
- Average humidity in December: 90%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (78%).
Average rainfall in December
Port Chilkoot, AK
- Average rainfall in December: 5.47"
The wettest month (with the highest rainfall) is November (5.87").
The driest month (with the least rainfall) is June (2.2").
Average rainfall days in December
Port Chilkoot, AK
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is October (20.2 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in December
Port Chilkoot, AK
- Average snowfall in December: 21.06"
The month with the highest snowfall is December (21.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Port Chilkoot, AK
- Average snowfall days in December: 17.1 days
The month with the highest number of snowfall days is December (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Port Chilkoot, AK
- Average daylight in December: 6h and 2min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in December
Port Chilkoot, AK
- Average sunshine days in December: 8.9 days
The month with the most sunshine days is February (10.4 days).
The month with the least sunshine days is June (6.3 days).
Average UV index in December
Port Chilkoot, AK
- Average UV index in December: 1
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in December
Port Chilkoot, AK
- Average cloud cover in December: 63
The month with the most cloud cover is December (Cloud cover 63).
The month with the least cloud cover is May (Cloud cover 47).
Average visibility in December
Port Chilkoot, AK
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Port Chilkoot, Alaska, USA
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