December weather forecast
Eugene, OR

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Bright neon lights light up the colorful city of Eugene in Oregon,
Bright neon lights light up the colorful city of Eugene in Oregon,

Weather in December

December in Eugene marks the full-fledged start of winter, presenting the city with the lowest temperatures and the longest nights of the year. The weather pattern mirrors that of January with an increase in rainfall to 1.54" (39mm), the highest yearly, and a return of snowfall. Although December boasts only 4.2 hours of sunshine, the landscape gets veiled in a cinematic snowy spectacle. This month concludes the year with a festive, chilly province that gradually transitions into January, thus restarting the annual weather cycle.

Temperature

Eugene, Oregon, experiences its lowest temperatures in December, with an average peak of 46.2°F (7.9°C) and a low of 33.8°F (1°C).

Humidity

January through March and December, with an average relative humidity of 86%, are the most humid months in Eugene.

Rainfall

The month with the most rainfall in Eugene is December, when the rain falls for 13.4 days and typically aggregates up to 1.54" (39mm) of precipitation.

Snowfall

January through March and December are months with snowfall in Eugene. December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Eugene, Oregon, there are 5 snowfall days, and 2.36" (60mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:28 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:44 pm PST.

Sunshine

The average sunshine in December 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 estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 2 in December leads to these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

What part of the year is the coldest in Eugene?

The coldest period in Eugene, Oregon, is December, when temperatures fluctuate between an average high of 46.2°F (7.9°C) and a low of 33.8°F (1°C).

What are December temperatures in Eugene?

The high-temperature, in December, in Eugene, is 46.2°F (7.9°C), while the low-temperature averages to 33.8°F (1°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in August is appraised at 84.2°F (29°C).

What are the most humid months in Eugene?

The months with the highest humidity in Eugene, Oregon, are January through March and December, with an average relative humidity of 86%.

What is the average humidity in December in Eugene?

The average relative humidity in December is 86%.

What is the wettest month in Eugene?

The month with the most rainfall in Eugene, Oregon, is December, when the rain falls for 13.4 days and typically aggregates up to 1.54" (39mm) of precipitation.

How many days does it rain in December in Eugene?

In Eugene, during December, the rain falls for 13.4 days and regularly aggregates up to 1.54" (39mm) of precipitation.

When does it start to snow in Eugene?

December is the first month it typically snows in Eugene, Oregon. Throughout December, in the average 0.6 snowfall days, it receives 0.2" (5mm) of snow.

What is the month with the shortest days in Eugene?

The month with the shortest days is December, with an average of 9h and 0min of daylight.

What is the average length of the day in December in Eugene?

The average day length in December in Eugene, Oregon, is 8h and 57min.

When is the sunrise / sunset in December in Eugene?

In December, on the first day of the month, sunrise is at 7:28 am and sunset at 4:35 pm. On the last day of the month, in Eugene, Oregon, sunrise is at 7:47 am and sunset at 4:44 pm PST.

How long on average sun shines in December in Eugene?

In Eugene, Oregon, the average sunshine duration in December is 4.2h.

What is the month with the lowest UV index in Eugene?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Eugene, Oregon.

How high is the UV index in December in Eugene?

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

Average temperature in December
Eugene, OR

Average temperature in December - Eugene, OR
  • Average high temperature in December: 46.2°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 (46.2°F).

  • Average low temperature in December: 33.8°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).

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Average pressure in December
Eugene, OR

Average pressure in December - Eugene, OR
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

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Average wind speed in December
Eugene, OR

Average wind speed in December - Eugene, OR
  • Average wind speed in December: 4.4mph

The windiest months (with the highest average wind speed) are January and March (4.5mph).
The calmest months (with the lowest average wind speed) are August and September (3.6mph).

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Average humidity in December
Eugene, OR

Average humidity in December - Eugene, OR
  • Average humidity in December: 86%

The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (68%).

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Average rainfall in December
Eugene, OR

Average rainfall in December - Eugene, OR
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is July (0.08").

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Average rainfall days in December
Eugene, OR

Average rainfall days in December - Eugene, OR
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is December (13.4 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in December
Eugene, OR

Average snowfall in December - Eugene, OR
  • Average snowfall in December: 0.2"

The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Eugene, OR

Average snowfall days in December - Eugene, OR
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Eugene, OR

Average daylight in December / Average sunshine in December - Eugene, OR
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).

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Average sunshine days in December
Eugene, OR

Average sunshine days in December - Eugene, OR
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is February (14.3 days).

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Average UV index in December
Eugene, OR

Average UV index in December - Eugene, 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, November and December (UV index 2).

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Average cloud cover in December
Eugene, OR

Average cloud cover in December - Eugene, OR
  • Average cloud cover in December: 58

The months with the most cloud cover are February and March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).

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Average visibility in December
Eugene, OR

Average visibility in December - Eugene, OR
  • Average visibility in December: 4mi

The months with the highest visibility are June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, November and December (4mi).

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Eugene, Oregon, USA

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