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 November turns into December, the average high-temperatures rest at a still icy 36.9°F (2.7°C), showing a minor variation from the prior month. Old Harbor records a slight downturn to an average a still wintry 32°F (0°C) during the nights of December.Humidity
In December, the average relative humidity is 82%.Rainfall
In December, the rain falls for 14.8 days. Throughout December, 4.29" (109mm) of precipitation is accumulated. Throughout the year, there are 171.2 rainfall days, and 37.32" (948mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Old Harbor, during December, snow falls for 5.1 days and regularly aggregates up to 2.32" (59mm) of snow. Throughout the year, there are 35.1 snowfall days, and 13.74" (349mm) of snow is accumulated.Daylight
With an average of 6h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 9:29 am and sunset at 4:36 pm. On the last day of December, sunrise is at 9:52 am and sunset at 4:40 pm AKST.
Sunshine
The months with the least sunshine are January and December, with an average of 2.6h of sunshine.UV index
In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Old Harbor have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Old Harbor have in December?
How high is the UV index in December?
Average temperature in December
Old Harbor, AK
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is August (57.6°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is March (30.6°F).
Average pressure in December
Old Harbor, AK
- Average pressure in December: 29.55"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is December (29.55"Hg).
Average wind speed in December
Old Harbor, AK
- Average wind speed in December: 14.2mph
The windiest month (with the highest average wind speed) is December (14.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Old Harbor, AK
- Average humidity in December: 82%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are March and November (80%).
Average rainfall in December
Old Harbor, AK
- Average rainfall in December: 4.29"
The wettest months (with the highest rainfall) are October and November (4.53").
The driest month (with the least rainfall) is July (1.85").
Average rainfall days in December
Old Harbor, AK
- Average rainfall days in December: 14.8 days
The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is March (10.8 days).
Average snowfall in December
Old Harbor, AK
- Average snowfall in December: 2.32"
The month with the highest snowfall is March (3.15").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Old Harbor, AK
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is March (8.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Old Harbor, AK
- Average daylight in December: 6h and 5min
The month with the longest days is June (Average daylight: 17h and 48min).
The month with the shortest days is December (Average daylight: 6h and 48min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is July (Average sunshine: 8h and 18min).
The months with the least sunshine are January and December (Average sunshine: 2h and 36min).
Average sunshine days in December
Old Harbor, AK
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is July (14.7 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in December
Old Harbor, AK
- Average UV index in December: 2
The months with the highest UV index are June, July, August and September (UV index 3).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Old Harbor, AK
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 52).
Average visibility in December
Old Harbor, AK
- 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).
Old Harbor, Alaska, USA
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