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 is the month when Deer Island, Oregon, sees the lowest average temperatures, with a high of 42.6°F (5.9°C) and a low of 32.9°F (0.5°C).Humidity
The average relative humidity in December in Deer Island is 86%.Rainfall
In Deer Island, in December, during 19.5 rainfall days, 5.24" (133mm) of precipitation is typically accumulated. In Deer Island, during the entire year, the rain falls for 180.2 days and collects up to 36.77" (934mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Deer Island. In Deer Island, during December, snow falls for 0.8 days and regularly aggregates up to 0.31" (8mm) of snow. Throughout the year, in Deer Island, there are 7.6 snowfall days, and 5.79" (147mm) of snow is accumulated.Daylight
The month with the shortest days in Deer Island, Oregon, is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:33 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:52 am and sunset at 4:36 pm PST.
Sunshine
In Deer Island, the average sunshine in December is 3.8h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
What part of the year is the coldest in Deer Island?
How cold is December in Deer Island?
What is the average humidity in December in Deer Island?
How many days does it rain in December in Deer Island?
How much does it snow in Deer Island in December?
What is the month with the shortest days in Deer Island?
What is the average length of the day in December in Deer Island?
What time are sunrise and sunset in December in Deer Island?
How long on average sun shines in December in Deer Island?
What is the month with the lowest UV index in Deer Island?
How high is the UV index in December in Deer Island?
Average temperature in December
Deer Island, OR
- Average high temperature in December: 42.6°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in December
Deer Island, OR
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in December
Deer Island, OR
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in December
Deer Island, OR
- Average humidity in December: 86%
The months with the highest relative humidity are February and November (87%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in December
Deer Island, OR
- Average rainfall in December: 5.24"
The wettest month (with the highest rainfall) is January (5.43").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Deer Island, OR
- Average rainfall days in December: 19.5 days
The month with the highest number of rainy days is March (21 days).
The month with the least rainy days is July (5.2 days).
Average snowfall in December
Deer Island, OR
- Average snowfall in December: 0.31"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Deer Island, OR
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Deer Island, OR
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in December
Deer Island, OR
- Average sunshine days in December: 10.4 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Deer Island, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Deer Island, OR
- Average cloud cover in December: 61
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Deer Island, OR
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Deer Island, Oregon, USA
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