December weather forecastKoyuk, AK
December
Weather in December
The first month of the winter, December, is still an extremely cold month in Koyuk, Alaska, with an average temperature fluctuating between 12.4°F (-10.9°C) and 5.4°F (-14.8°C).Temperature
December's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from November's freezing cold 19.6°F (-6.9°C) to a frigid cold 12.4°F (-10.9°C). A consistent average low-temperature of 5.4°F (-14.8°C), with a minor variance from the daytime highs, is noted during the nights of December.Humidity
In December, the average relative humidity is 91%.Rainfall
In Koyuk, in December, during 3.6 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, there are 118.6 rainfall days, and 13.39" (340mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In Koyuk, during December, snow falls for 15.1 days and regularly aggregates up to 4.21" (107mm) of snow. In Koyuk, during the entire year, snow falls for 94.3 days and aggregates up to 27.2" (691mm) of snow.Daylight
With an average of 3h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 11:16 am and sunset at 3:51 pm. On the last day of December, sunrise is at 11:49 am and sunset at 3:46 pm AKST.
Sunshine
In Koyuk, the average sunshine in December is 3h.UV index
January through March and 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 low threat to health from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Koyuk, AK
- Average high temperature in December: 12.4°F
The warmest month (with the highest average high temperature) is July (59.5°F).
The month with the lowest average high temperature is January (9.1°F).
- Average low temperature in December: 5.4°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).
Average pressure in December
Koyuk, AK
- Average pressure in December: 29.75"Hg
The month with the highest atmospheric pressure is May (29.92"Hg).
The month with the lowest atmospheric pressure is October (29.72"Hg).
Average wind speed in December
Koyuk, AK
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is October (9.6mph).
The calmest month (with the lowest average wind speed) is June (6mph).
Average humidity in December
Koyuk, AK
- Average humidity in December: 91%
The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is June (72%).
Average rainfall in December
Koyuk, AK
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is August (2.24").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Koyuk, AK
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in December
Koyuk, AK
- Average snowfall in December: 4.21"
The month with the highest snowfall is November (4.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Koyuk, AK
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is March (16.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Koyuk, AK
- Average daylight in December: 3h and 54min
The month with the longest days is June (Average daylight: 21h and 36min).
The month with the shortest days is December (Average daylight: 3h and 54min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is May (Average sunshine: 8h and 18min).
The month with the least sunshine is June (Average sunshine: 2h and 54min).
Average sunshine days in December
Koyuk, AK
- Average sunshine days in December: 15 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (8.4 days).
Average UV index in December
Koyuk, 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 January, February, March and December (UV index 1).
Average cloud cover in December
Koyuk, AK
- Average cloud cover in December: 58
The month with the most cloud cover is August (Cloud cover 62).
The month with the least cloud cover is June (Cloud cover 50).
Average visibility in December
Koyuk, AK
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
