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
The month of December, characterized by an average high of 37.9°F (3.3°C) and a low of 27.3°F (-2.6°C), is recognized as the coldest.Humidity
In December, the average relative humidity is 78%.Rainfall
In Pendleton, during December, the rain falls for 13.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 132.7 rainfall days, and 12.91" (328mm) of precipitation is accumulated.Snowfall
January through April, September, November and December are months with snowfall. In Pendleton, during December, snow falls for 5.5 days and regularly aggregates up to 2.05" (52mm) of snow. In Pendleton, Oregon, during the entire year, snow falls for 17.5 days and aggregates up to 9.41" (239mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 4:12 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:21 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.4h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: During December, 2 as the daily maximum UV index converts into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
Is it cold during December?
What is the average humidity in December?
How much does it rain in December?
How much 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 are the months with the least sunshine?
How long on average sun shines in December in Pendleton?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Pendleton, OR
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is December (27.3°F).
Average pressure in December
Pendleton, OR
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Pendleton, OR
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).
Average humidity in December
Pendleton, OR
- Average humidity in December: 78%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Pendleton, OR
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is March (1.65").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Pendleton, OR
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (3.6 days).
Average snowfall in December
Pendleton, OR
- Average snowfall in December: 2.05"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in December
Pendleton, OR
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is December (5.5 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Pendleton, 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: 5h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in December
Pendleton, OR
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (11.7 days).
Average UV index in December
Pendleton, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Pendleton, OR
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in December
Pendleton, OR
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Pendleton, Oregon, USA
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