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 coldest period tends to be December, when average temperatures fluctuate between a high of 32.5°F (0.3°C) and a low of 20.5°F (-6.4°C).Humidity
The average relative humidity in December is 84%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.5 days and typically aggregates up to 2.48" (63mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In La Grande, in December, during 13.2 snowfall days, 8.62" (219mm) of snow is typically accumulated. In La Grande, during the entire year, snow falls for 56.6 days and aggregates up to 36.85" (936mm) 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 7:12 am and sunset at 4:11 pm. On the last day of December, sunrise is at 7:31 am and sunset at 4:19 pm PST.
Sunshine
In La Grande, the average sunshine in December is 5.3h.UV index
The months with the lowest UV index are January through April, 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 radiation for ordinary individuals.Note: An average UV index of 2 in December transforms into this advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. To guard against the harmful effects of the Sun, minimize exposure during midday. Boost your sun resistance with garments that are densely woven yet spacious. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is it in December?
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?
How many hours of daylight does La Grande have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does La Grande have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
La Grande, OR
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is August (81.3°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (20.5°F).
Average pressure in December
La Grande, OR
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in December
La Grande, OR
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
La Grande, OR
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
La Grande, OR
- Average rainfall in December: 2.48"
The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
La Grande, OR
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in December
La Grande, OR
- Average snowfall in December: 8.62"
The month with the highest snowfall is February (10.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
La Grande, OR
- Average snowfall days in December: 13.2 days
The month with the highest number of snowfall days is December (13.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
La Grande, 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 February (Average sunshine: 5h and 6min).
Average sunshine days in December
La Grande, OR
- Average sunshine days in December: 11.9 days
The month with the most sunshine days is July (23.4 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in December
La Grande, 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, March, April, November and December (UV index 2).
Average cloud cover in December
La Grande, OR
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
La Grande, OR
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
La Grande, Oregon, USA
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