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 sea temperature 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 is the coldest month, exhibiting average temperatures of 32.4°F (0.2°C) at the peak and 27.5°F (-2.5°C) at the base.Humidity
In December, the average relative humidity is 83%.Rainfall
In Petersburg, Alaska, in December, during 14.6 rainfall days, 4.65" (118mm) of precipitation is typically accumulated. In Petersburg, during the entire year, the rain falls for 197.9 days and collects up to 53.03" (1347mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Petersburg, in December, snow falls for 8.4 days, with typically accumulated 10.67" (271mm) of snow. In Petersburg, during the entire year, snow falls for 47.5 days and aggregates up to 58.23" (1479mm) of snow.Ocean temperature
In Petersburg, the average seawater temperature in December is 44.2°F (6.8°C).Note: Navigating the 44.2°F (6.8°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
The month with the shortest days is December, with an average of 6h and 54min of daylight.On the first day of December, sunrise is at 8:05 am and sunset at 3:17 pm. On the last day of the month, sunrise is at 8:28 am and sunset at 3:22 pm AKST.
Sunshine
The average sunshine in December is 3.8h.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
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 ocean temperature 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?
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
Petersburg, AK
- Average high temperature in December: 32.4°F
The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).
Average pressure in December
Petersburg, AK
- Average pressure in December: 29.88"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in December
Petersburg, AK
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).
Average humidity in December
Petersburg, AK
- Average humidity in December: 83%
The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).
Average rainfall in December
Petersburg, AK
- Average rainfall in December: 4.65"
The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").
Average rainfall days in December
Petersburg, AK
- Average rainfall days in December: 14.6 days
The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in December
Petersburg, AK
- Average snowfall in December: 10.67"
The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Petersburg, AK
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Petersburg, AK
- Average sea temperature in December: 44.3°F
The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).
Average daylight in December /
Average sunshine in December
Petersburg, AK
- Average daylight in December: 6h and 5min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).
Average sunshine days in December
Petersburg, AK
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).
Average UV index in December
Petersburg, AK
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in December
Petersburg, AK
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are February and May (Cloud cover 54).
Average visibility in December
Petersburg, AK
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Petersburg, Alaska, USA
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