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
December's arrival brings an average high-temperature of a still icy 32.4°F (0.2°C), demonstrating subtle variation from the preceding month. In December, Port Heiden's nighttime temperatures demonstrate a slight decrease, stabilizing at an average of 27.5°F (-2.5°C).Humidity
In Port Heiden, the average relative humidity in December is 85%.Rainfall
In December, the rain falls for 11.2 days. Throughout December, 2.01" (51mm) of precipitation is accumulated. Throughout the year, there are 160.7 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. December is the month with the most snowfall. Snow falls for 15.1 days and accumulates 5.71" (145mm) of snow.Daylight
The month with the shortest days is December, with an average of 6h and 54min of daylight.On the first day of the month, sunrise is at 9:48 am and sunset at 4:58 pm. On the last day of December, sunrise is at 10:11 am and sunset at 5:03 pm AKST.
Sunshine
December has the least sunshine of the year in Port Heiden, Alaska, with an average of 2.4h of sunshine.UV index
February, March, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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?
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?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Port Heiden, AK
- Average high temperature in December: 32.4°F
The warmest month (with the highest average high temperature) is August (56.8°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is August (49.1°F).
The coldest months (with the lowest average low temperature) are January and March (23.4°F).
Average pressure in December
Port Heiden, AK
- Average pressure in December: 29.54"Hg
The month with the highest atmospheric pressure is July (29.97"Hg).
The month with the lowest atmospheric pressure is December (29.54"Hg).
Average wind speed in December
Port Heiden, AK
- Average wind speed in December: 14.8mph
The windiest month (with the highest average wind speed) is December (14.8mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).
Average humidity in December
Port Heiden, AK
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (78%).
Average rainfall in December
Port Heiden, AK
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is June (0.83").
Average rainfall days in December
Port Heiden, AK
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is September (19.2 days).
The month with the least rainy days is March (7.6 days).
Average snowfall in December
Port Heiden, AK
- Average snowfall in December: 5.71"
The month with the highest snowfall is December (5.71").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Port Heiden, AK
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is December (15.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Port Heiden, 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 54min).
- Average sunshine in December: 2h and 2min
The month with the most sunshine is May (Average sunshine: 7h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in December
Port Heiden, AK
- Average sunshine days in December: 6.7 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is November (6 days).
Average UV index in December
Port Heiden, AK
- Average UV index in December: 1
The months with the highest UV index are May, June, July, August and September (UV index 3).
The months with the lowest UV index are February, March, November and December (UV index 1).
Average cloud cover in December
Port Heiden, AK
- Average cloud cover in December: 67
The month with the most cloud cover is July (Cloud cover 69).
The month with the least cloud cover is May (Cloud cover 59).
Average visibility in December
Port Heiden, AK
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, November and December (5mi).
Port Heiden, Alaska, USA
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