December weather forecast
Eugene, CA

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Weather in December

The first month of the winter, December, is also a moderate month in Eugene, California, with an average temperature varying between 41°F (5°C) and 55.4°F (13°C).

Temperature

Temperature readings reach their annual highs in December, averaging 55.4°F (13°C) and a minimum average of 41°F (5°C).

Humidity

The average relative humidity in December in Eugene is 70%.

Rainfall

In Eugene, in December, it is raining for 8.4 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, in Eugene, there are 59.3 rainfall days, and 8.23" (209mm) of precipitation is accumulated.

Snowfall

December is the only month when snow falls in Eugene. The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.04" (1mm) of snow.

Daylight

December has the shortest days of the year in Eugene, California, with an average of 9h and 36min of daylight.
On the first day of December in Eugene, sunrise is at 7:01 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:54 pm PST.

Sunshine

December has the least sunshine of the year, with an average of 6h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the UV index of 3 transforms into the following advice:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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Frequently asked questions

What is the coldest time of year in Eugene?

Eugene's temperature records reveal December as the coldest month, marked by average highs of 55.4°F (13°C) and lows of 41°F (5°C).

What is the average December temperature in Eugene?

The high-temperature, in December, in Eugene, is 55.4°F (13°C), while the low-temperature averages to 41°F (5°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is calculated to be 91.4°F (33°C).

What is the average humidity in December in Eugene?

In December, the average relative humidity is 70%.

How many days does it rain in December in Eugene?

In Eugene, California, during December, the rain falls for 8.4 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When does it snow the most in Eugene?

The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.04" (1mm) of snow.

When does it start to snow in Eugene?

December is the first month it typically snows in Eugene, California. Throughout December, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days in Eugene?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

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

The average day length in December in Eugene is 9h and 35min.

What time are sunrise and sunset in December in Eugene?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:44 pm. On the last day of the month, in Eugene, sunrise is at 7:19 am and sunset at 4:54 pm PST.

What is the month with the least sunshine in Eugene?

With an average of 6h of sunshine, December has the least sunshine of the year in Eugene.

How many hours of sunshine does Eugene have in December?

The average sunshine duration in December in Eugene is 6h.

What are the months with the lowest UV index in Eugene?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

How high is the UV index in December in Eugene?

In December, the average daily maximum UV index in Eugene, California, is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
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, CA

Average temperature in December - Eugene, CA
  • Average high temperature in December: 55.4°F

The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in December: 41°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).

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Average pressure in December
Eugene, CA

Average pressure in December - Eugene, CA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Eugene, CA

Average wind speed in December - Eugene, CA
  • Average wind speed in December: 5.5mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

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Average humidity in December
Eugene, CA

Average humidity in December - Eugene, CA
  • Average humidity in December: 70%

The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (37%).

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Average rainfall in December
Eugene, CA

Average rainfall in December - Eugene, CA
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is March (1.65").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Eugene, CA

Average rainfall days in December - Eugene, CA
  • Average rainfall days in December: 8.4 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is August (0.7 days).

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Average snowfall in December
Eugene, CA

Average snowfall in December - Eugene, CA
  • Average snowfall in December: 0.04"

The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Eugene, CA

Average snowfall days in December - Eugene, CA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in December / Average sunshine in December - Eugene, CA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in December
Eugene, CA

Average sunshine days in December - Eugene, CA
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (18.7 days).

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Average UV index in December
Eugene, CA

Average UV index in December - Eugene, CA
  • Average UV index in December: 3

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Eugene, CA

Average cloud cover in December - Eugene, CA
  • Average cloud cover in December: 32

The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in December
Eugene, CA

Average visibility in December - Eugene, CA
  • 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).

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Eugene, California, USA

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