December weather forecast
Forest Ranch, CA

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Weather in December

December, the first month of the winter in Forest Ranch, is also a frosty month, with an average temperature ranging between min 34.9°F (1.6°C) and max 49.1°F (9.5°C).

Temperature

With average high and low temperatures of 49.1°F (9.5°C) and 34.9°F (1.6°C) respectively, December is Forest Ranch's coldest month.

Humidity

The average relative humidity in December in Forest Ranch is 70%.

Rainfall

In Forest Ranch, during December, the rain falls for 10.7 days and regularly aggregates up to 4.65" (118mm) of precipitation. Throughout the year, there are 88.8 rainfall days, and 27.6" (701mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In December, it is snowing for 1.3 days. Throughout December, 1.34" (34mm) of snow is accumulated. Throughout the year, there are 7.5 snowfall days, and 11.38" (289mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:52 pm PST.

Sunshine

With an average of 5.5h of sunshine, December has the least sunshine of the year in Forest Ranch.

UV index

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Enhance your sun protection with tightly woven, yet airy clothing. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

Forest Ranch's December weather reaches an average high of 49.1°F (9.5°C) and an average low of 34.9°F (1.6°C), making it the coldest month.

What are the temperatures in December?

In Forest Ranch, 49.1°F (9.5°C) is the average high-temperature and 34.9°F (1.6°C) is the average low-temperature during December. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in June is evaluated at 80.6°F (27°C).

What is the average humidity in December?

In December, the average relative humidity is 70%.

How much does it rain in December?

In Forest Ranch, in December, during 10.7 rainfall days, 4.65" (118mm) of precipitation is typically accumulated.

How many days does it snow in December?

In December, it is snowing for 1.3 days. Throughout December, 1.34" (34mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days in Forest Ranch is December, with an average of 9h and 24min of daylight.

How many hours of daylight does Forest Ranch have in December?

In December, the average day length is 9h and 24min.

When are sunrise and sunset in December in Forest Ranch?

On the first day of December, sunrise is at 7:09 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:52 pm PST.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 5.5h of sunshine.

How long on average sun shines in December?

In December, the average sunshine duration is 5.5h.

What is the month with the lowest UV index?

The months with the lowest UV index are February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Forest Ranch?

In December, the average daily maximum UV index in Forest Ranch, California, is 2. A UV Index of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
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
Forest Ranch, CA

Average temperature in December - Forest Ranch, CA
  • Average high temperature in December: 49.1°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (49.1°F).

  • Average low temperature in December: 34.9°F

The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).

Average pressure in December
Forest Ranch, CA

Average pressure in December - Forest Ranch, CA
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Forest Ranch, CA

Average wind speed in December - Forest Ranch, CA
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is March (6.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Forest Ranch, CA

Average humidity in December - Forest Ranch, CA
  • Average humidity in December: 70%

The month with the highest relative humidity is March (76%).
The months with the lowest relative humidity are July and August (36%).

Average rainfall in December
Forest Ranch, CA

Average rainfall in December - Forest Ranch, CA
  • Average rainfall in December: 4.65"

The wettest month (with the highest rainfall) is March (5").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in December
Forest Ranch, CA

Average rainfall days in December - Forest Ranch, CA
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is July (2.3 days).

Average snowfall in December
Forest Ranch, CA

Average snowfall in December - Forest Ranch, CA
  • Average snowfall in December: 1.34"

The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Forest Ranch, CA

Average snowfall days in December - Forest Ranch, CA
  • Average snowfall days in December: 1.3 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).

Average daylight in December /
Average sunshine in December
Forest Ranch, CA

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

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

  • Average sunshine in December: 5h and 3min

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 30min).

Average sunshine days in December
Forest Ranch, CA

Average sunshine days in December - Forest Ranch, CA
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is July (27.8 days).
The month with the least sunshine days is March (14.8 days).

Average UV index in December
Forest Ranch, CA

Average UV index in December - Forest Ranch, CA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 2).

Average cloud cover in December
Forest Ranch, CA

Average cloud cover in December - Forest Ranch, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 5).

Average visibility in December
Forest Ranch, CA

Average visibility in December - Forest Ranch, 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).

Forest Ranch, California, USA

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