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 coldest month, exhibiting average temperatures of 40.6°F (4.8°C) at the peak and 30.7°F (-0.7°C) at the base.Humidity
In Brightwood, Oregon, the average relative humidity in December is 85%.Rainfall
The month with the most rainfall in Brightwood is December, when the rain falls for 18.5 days and typically aggregates up to 6.42" (163mm) of precipitation.Snowfall
Months with snowfall in Brightwood are January through May, November and December. In Brightwood, during December, snow falls for 7.1 days and regularly aggregates up to 4.53" (115mm) of snow. In Brightwood, during the entire year, snow falls for 31.6 days and aggregates up to 33.86" (860mm) of snow.Daylight
December has the shortest days of the year in Brightwood, with an average of 8h and 48min of daylight.On the first day of December, sunrise is at 7:28 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:35 pm PST.
Sunshine
In Brightwood, the average sunshine in December is 4.1h.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Boost your sun resistance with garments that are densely woven yet spacious. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest time of year in Brightwood?
How cold does it get in Brightwood in December?
What is the average humidity in December in Brightwood?
What is the wettest month in Brightwood?
How much does it rain in Brightwood in December?
How much does it snow in Brightwood in December?
What is the month with the shortest days in Brightwood?
What is the average length of the day in December in Brightwood?
When is the sunrise / sunset in December in Brightwood?
How long on average sun shines in December in Brightwood?
How high is the UV index in December in Brightwood?
Average temperature in December
Brightwood, OR
- Average high temperature in December: 40.6°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (40.6°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in December
Brightwood, OR
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in December
Brightwood, OR
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is January (6.7mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Brightwood, OR
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Brightwood, OR
- Average rainfall in December: 6.42"
The wettest month (with the highest rainfall) is December (6.42").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Brightwood, OR
- Average rainfall days in December: 18.5 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is July (6 days).
Average snowfall in December
Brightwood, OR
- Average snowfall in December: 4.53"
The month with the highest snowfall is February (11.69").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Brightwood, OR
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Brightwood, OR
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in December
Brightwood, OR
- Average sunshine days in December: 9.8 days
The month with the most sunshine days is July (22.9 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Brightwood, OR
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Brightwood, OR
- Average cloud cover in December: 56
The months with the most cloud cover are February and March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Brightwood, OR
- Average visibility in December: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (5mi).
Brightwood, Oregon, USA
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