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 proves to be the coldest month, recording an average maximum temperature of 44.4°F (6.9°C) and a minimum temperature of 29.3°F (-1.5°C).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 83%.Rainfall
December is the month with the most rainfall. Rain falls for 14.4 days and accumulates 3.11" (79mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Phoenix, in December, during 2.7 snowfall days, 1.3" (33mm) of snow is typically accumulated. Throughout the year, there are 14.2 snowfall days, and 8.15" (207mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:21 am and sunset at 4:39 pm. On the last day of December, in Phoenix, sunrise is at 7:40 am and sunset at 4:49 pm PST.
Sunshine
With an average of 5.3h of sunshine, December has the least sunshine of the year.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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 2 in December transforms into this advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
Is it cold during December?
What is the most humid month?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
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 are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Phoenix, OR
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (29.3°F).
Average pressure in December
Phoenix, OR
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in December
Phoenix, OR
- Average wind speed in December: 3.9mph
The windiest months (with the highest average wind speed) are January and March (4.2mph).
The calmest months (with the lowest average wind speed) are August, September and October (3.4mph).
Average humidity in December
Phoenix, OR
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is August (59%).
Average rainfall in December
Phoenix, OR
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in December
Phoenix, OR
- Average rainfall days in December: 14.4 days
The month with the highest number of rainy days is March (17.8 days).
The month with the least rainy days is August (3.7 days).
Average snowfall in December
Phoenix, OR
- Average snowfall in December: 1.3"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Phoenix, OR
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Phoenix, OR
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Phoenix, OR
- Average sunshine days in December: 14 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is March (11.2 days).
Average UV index in December
Phoenix, 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
Phoenix, OR
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in December
Phoenix, OR
- Average visibility in December: 5mi
The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).
Phoenix, Oregon, USA
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