December weather forecast
South Oroville, CA

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Weather in December

The first month of the winter, December, is also a fresh month in South Oroville, California, with an average temperature ranging between max 54.5°F (12.5°C) and min 40.6°F (4.8°C).

Temperature

December, on average, is the coldest month, registering a high temperature of 54.5°F (12.5°C) and a low of 40.6°F (4.8°C).

Humidity

The average relative humidity in December is 67%.

Rainfall

In South Oroville, in December, during 11.1 rainfall days, 4.33" (110mm) of precipitation is typically accumulated. In South Oroville, during the entire year, the rain falls for 80.4 days and collects up to 24.21" (615mm) of precipitation.

Snowfall

December is the only month when snow falls. The month with the most snowfall days is December, when snow falls for 0.1 days.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:08 am and sunset at 4:42 pm. On the last day of December, in South Oroville, sunrise is at 7:26 am and sunset at 4:52 pm PST.

Sunshine

With an average of 5.8h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

South Oroville's December weather, marked by an average high temperature of 54.5°F (12.5°C) and an average low temperature of 40.6°F (4.8°C), is the coldest in the year.

What is the average December temperature?

The high-temperature during December is 54.5°F (12.5°C) and the low-temperature is 40.6°F (4.8°C). In June, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 87.8°F (31°C).

What is the average humidity in December?

In December, the average relative humidity is 67%.

How much does it rain in December?

In South Oroville, in December, it is raining for 11.1 days, with typically 4.33" (110mm) of accumulated precipitation.

When does it snow the most?

The month with the most snowfall days is December, when snow falls for 0.1 days.

When does it start to snow?

December is the first month it typically snows in South Oroville, California. Throughout December, there are 0.1 snowfall days.

What is the month with the shortest days?

December has the shortest days of the year in South Oroville, with an average of 9h and 24min of daylight.

How many hours of daylight does South Oroville have in December?

The average day length in December is 9h and 26min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:52 pm PST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.8h of sunshine.

How many hours of sunshine does South Oroville have in December?

The average sunshine duration in December is 5.8h.

When is the lowest UV index in South Oroville?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health risk 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
South Oroville, CA

Average temperature in December - South Oroville, CA
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is July (95.9°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 40.6°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).

Average pressure in December
South Oroville, CA

Average pressure in December - South Oroville, CA
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
South Oroville, CA

Average wind speed in December - South Oroville, CA
  • Average wind speed in December: 5.3mph

The windiest month (with the highest average wind speed) is March (6.3mph).
The calmest months (with the lowest average wind speed) are August and November (5.2mph).

Average humidity in December
South Oroville, CA

Average humidity in December - South Oroville, CA
  • Average humidity in December: 67%

The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (33%).

Average rainfall in December
South Oroville, CA

Average rainfall in December - South Oroville, CA
  • Average rainfall in December: 4.33"

The wettest month (with the highest rainfall) is March (4.61").
The driest month (with the least rainfall) is July (0.04").

Average rainfall days in December
South Oroville, CA

Average rainfall days in December - South Oroville, CA
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (1.3 days).

Average snowfall days in December
South Oroville, CA

Average snowfall days in December - South Oroville, 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
South Oroville, CA

Average daylight in December / Average sunshine in December - South Oroville, CA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in December
South Oroville, CA

Average sunshine days in December - South Oroville, CA
  • Average sunshine days in December: 19.2 days

The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is March (15.5 days).

Average UV index in December
South Oroville, CA

Average UV index in December - South Oroville, 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
South Oroville, CA

Average cloud cover in December - South Oroville, CA
  • Average cloud cover in December: 35

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in December
South Oroville, CA

Average visibility in December - South Oroville, 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).

South Oroville, California, USA

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