December weather forecast
La Grande, OR

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Weather in December

The first month of the winter, December, is also a wintry month in La Grande, Oregon, with an average temperature fluctuating between 20.5°F (-6.4°C) and 32.5°F (0.3°C).

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.

Frequently asked questions

What is the coldest time of year?

The coldest time of the year in La Grande is December, with temperatures averaging a high of 32.5°F (0.3°C) and a low of 20.5°F (-6.4°C).

How cold is it in December?

During December, La Grande experiences an average high-temperature of 32.5°F (0.3°C) and a low-temperature of 20.5°F (-6.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is calculated to be 80.6°F (27°C).

What is the average humidity in December?

In December, the average relative humidity is 84%.

What is the wettest month?

December is the month with the most rainfall. Rain falls for 12.5 days and accumulates 2.48" (63mm) of precipitation.

How much does it rain in December?

In La Grande, during December, the rain falls for 12.5 days and regularly aggregates up to 2.48" (63mm) of precipitation.

How many days does it snow in December?

In La Grande, in December, snow falls for 13.2 days, with typically accumulated 8.62" (219mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 48min of daylight.

How many hours of daylight does La Grande have in December?

The average day length in December is 8h and 48min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:12 am and sunset at 4:11 pm. On the last day of the month, in La Grande, sunrise is at 7:31 am and sunset at 4:19 pm PST.

How many hours of sunshine does La Grande have in December?

In December, the average sunshine duration in La Grande is 5.3h.

When is the lowest UV index?

January through April, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
La Grande, OR

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / 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 - 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 - 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 - 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 - 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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