December weather forecastKoyukuk, AK
December
Weather in December
The first month of the winter, December, is also an arctic cold month in Koyukuk, Alaska, with an average temperature varying between 3.9°F (-15.6°C) and -5.4°F (-20.8°C).Temperature
Transitioning from November to December involves a subtle drop in average high-temperatures, descending from an extreme cold 10.6°F (-11.9°C) to a polar cold 3.9°F (-15.6°C). December nights observe an average temperature dip to a life-threatening cold -5.4°F (-20.8°C).Humidity
The average relative humidity in December is 95%.Rainfall
In December, the rain falls for 2.5 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. In Koyukuk, during the entire year, the rain falls for 116.7 days and collects up to 14.8" (376mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. December is the month with the most snowfall in Koyukuk. Snow falls for 17.5 days and accumulates 8.62" (219mm) of snow.Daylight
The month with the shortest days is December, with an average of 4h and 0min of daylight.On the first day of the month, sunrise is at 11:01 am and sunset at 3:38 pm. On the last day of December, sunrise is at 11:34 am and sunset at 3:33 pm AKST.
Sunshine
The month with the least sunshine is December, with an average of 2.3h of sunshine.UV index
January through March, October through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Koyukuk, AK
- Average high temperature in December: 3.9°F
The warmest month (with the highest average high temperature) is July (67.3°F).
The month with the lowest average high temperature is January (-0.8°F).
- Average low temperature in December: -5.4°F
The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is January (-10.5°F).
Average pressure in December
Koyukuk, AK
- Average pressure in December: 29.81"Hg
The month with the highest atmospheric pressure is February (29.93"Hg).
The months with the lowest atmospheric pressure are September and October (29.76"Hg).
Average wind speed in December
Koyukuk, AK
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is September (5.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).
Average humidity in December
Koyukuk, AK
- Average humidity in December: 95%
The months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (59%).
Average rainfall in December
Koyukuk, AK
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (2.05").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Koyukuk, AK
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is August (19 days).
The months with the least rainy days are January and February (2.3 days).
Average snowfall in December
Koyukuk, AK
- Average snowfall in December: 8.62"
The month with the highest snowfall is December (8.62").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Koyukuk, AK
- Average snowfall days in December: 17.5 days
The month with the highest number of snowfall days is March (20.3 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in December /
Average sunshine in December
Koyukuk, AK
- Average daylight in December: 4h and 0min
The month with the longest days is June (Average daylight: 21h and 30min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in December: 2h and 18min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
Average sunshine days in December
Koyukuk, AK
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is January (18 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in December
Koyukuk, AK
- Average UV index in December: 1
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in December
Koyukuk, AK
- Average cloud cover in December: 68
The month with the most cloud cover is April (Cloud cover 77).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in December
Koyukuk, AK
- Average visibility in December: 2mi
The months with the highest visibility are June and July (6mi).
The months with the lowest visibility are January, February, March, April and December (2mi).
