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 sees the lowest average temperatures, reaching 37.9°F (3.3°C) at the peak and 27.3°F (-2.6°C) at the low.Humidity
In Mission, the average relative humidity in December is 78%.Rainfall
In December, the rain falls for 13.5 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. In Mission, during the entire year, the rain falls for 132.7 days and collects up to 12.91" (328mm) of precipitation.Snowfall
Months with snowfall are January through April, September, November and December. In Mission, Oregon, in December, snow falls for 5.5 days, with typically accumulated 2.05" (52mm) of snow. In Mission, 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 7:15 am and sunset at 4:12 pm. On the last day of December, in Mission, sunrise is at 7:35 am and sunset at 4:20 pm PST.
Sunshine
January and December, with an average of 5.4h of sunshine, are months with the least sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mission. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What time of the year is the coldest in Mission?
How cold is December in Mission?
What is the average humidity in December in Mission?
How many days does it rain in December in Mission?
How much does it snow in Mission in December?
What is the month with the shortest days in Mission?
What is the average length of the day in December in Mission?
What time are sunrise and sunset in December in Mission?
What is the month with the least sunshine in Mission?
How many hours of sunshine does Mission have in December?
What is the month with the lowest UV index in Mission?
How high is the UV index in December in Mission?
Average temperature in December
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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
Mission, 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).
Mission, Oregon, USA
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