December weather forecast
Eugene, CA

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Weather in December

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

Temperature

Eugene's coldest month, December, registers temperatures that range from a high of 55.4°F (13°C) to a low of 41°F (5°C).

Humidity

In Eugene, the average relative humidity in December is 70%.

Rainfall

In Eugene, in December, during 8.4 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Eugene, during the entire year, the rain falls for 59.3 days and collects up to 8.23" (209mm) of precipitation.

Snowfall

The only month with snowfall is December. 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, with an average of 9h and 36min of daylight.
On the first day of December, 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

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

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 value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum UV index of 3 in December translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

In Eugene, the average lowest temperatures are observed in December, with a high of 55.4°F (13°C) and a low of 41°F (5°C).

What is the average December temperature?

In Eugene, 55.4°F (13°C) is the average high-temperature and 41°F (5°C) is the average low-temperature during December. The average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 91.4°F (33°C).

What is the average humidity in December in Eugene?

In Eugene, California, the average relative humidity in December is 70%.

How many days does it rain in December?

In Eugene, in December, it is raining for 8.4 days, with typically 1.46" (37mm) of accumulated precipitation.

What is the snowiest month?

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 snowing?

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

What is the month with the shortest days?

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?

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

When is the sunrise / sunset in December?

On the first day of December, 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.

What is the month with the least sunshine?

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

How long on average sun shines in December?

In Eugene, the average sunshine duration in December is 6h.

What are the months with the lowest UV index?

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 is 3. A UV Index of 3 to 5 symbolizes a medium health risk 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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Eugene, California, USA

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