December weather forecastSandy, OR
December
Weather in December
December, the first month of the winter in Sandy, is still a cold month, with an average temperature ranging between min 32°F (0°C) and max 41.5°F (5.3°C).Temperature
Sandy's December weather reaches an average high of 41.5°F (5.3°C) and an average low of 32°F (0°C), making it the coldest month.Humidity
In Sandy, the average relative humidity in December is 84%.Rainfall
The month with the most rainfall is December, when the rain falls for 17.5 days and typically aggregates up to 5.91" (150mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Sandy, in December, during 3.7 snowfall days, 2.17" (55mm) of snow is typically accumulated. Throughout the year, there are 21.3 snowfall days, and 19.49" (495mm) of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:29 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:48 am and sunset at 4:36 pm PST.
Sunshine
In December, the average sunshine is 4.2h.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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sandy, OR
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is August (51.1°F).
The coldest month (with the lowest average low temperature) is December (32°F).
Average pressure in December
Sandy, OR
- Average pressure in December: 30.11"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
Sandy, OR
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is January (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in December
Sandy, OR
- Average humidity in December: 84%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Sandy, OR
- Average rainfall in December: 5.91"
The wettest month (with the highest rainfall) is December (5.91").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Sandy, OR
- Average rainfall days in December: 17.5 days
The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is July (5.2 days).
Average snowfall in December
Sandy, OR
- Average snowfall in December: 2.17"
The month with the highest snowfall is February (6.34").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Sandy, OR
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is February (6.9 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
Sandy, OR
- Average daylight in December: 8h and 48min
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 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Sandy, OR
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in December
Sandy, OR
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Sandy, OR
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Sandy, 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).
