December weather forecast
Sycamore Springs, CA

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Weather in December

The first month of the winter, December, is also a moderate month in Sycamore Springs, California, with an average temperature varying between 41°F (5°C) and 58.6°F (14.8°C).

Temperature

With average temperatures fluctuating between a high of 58.6°F (14.8°C) and a low of 41°F (5°C), December stands out as the coldest month.

Humidity

In Sycamore Springs, the average relative humidity in December is 54%.

Rainfall

In Sycamore Springs, in December, during 6 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Sycamore Springs, during the entire year, the rain falls for 54 days and collects up to 6.61" (168mm) of precipitation.

Snowfall

December is the only month when snow falls. 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

The month with the shortest days is December, with an average of 10h and 0min of daylight.
On the first day of December, sunrise is at 6:34 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 4:50 pm PST.

Sunshine

February and December, with an average of 6.7h of sunshine, are months with the least sunshine.

UV index

The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: During December, 3 as the daily maximum UV index converts into the following advice:
Guard yourself - Avoiding sunburn is suggested. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Opt for tightly woven and loose clothing to enhance protection from the Sun. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.

Frequently asked questions

What is the coldest time of year?

December is the coldest month, with the temperature often reaching an average high of 58.6°F (14.8°C) and an average low of 41°F (5°C).

What are December temperatures?

December temperatures vary between a high-temperature of 58.6°F (14.8°C) and a low-temperature of 41°F (5°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 54%.

How many days does it rain in December?

In December, the rain falls for 6 days. Throughout December, 1.22" (31mm) of precipitation is accumulated.

When does it snow the most in Sycamore Springs?

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. Throughout December, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 0min of daylight.

What is the average length of the day in December?

In Sycamore Springs, the average day length in December is 9h and 58min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 6:34 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 4:50 pm PST.

What are the months with the least sunshine?

February and December, with an average of 6.7h of sunshine, are months with the least sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 6.7h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In Sycamore Springs, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
Sycamore Springs, CA

Average temperature in December - Sycamore Springs, CA
  • Average high temperature in December: 58.6°F

The warmest month (with the highest average high temperature) is August (90.5°F).
The month with the lowest average high temperature is December (58.6°F).

  • Average low temperature in December: 41°F

The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).

Average pressure in December
Sycamore Springs, CA

Average pressure in December - Sycamore Springs, CA
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Sycamore Springs, CA

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

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).

Average humidity in December
Sycamore Springs, CA

Average humidity in December - Sycamore Springs, CA
  • Average humidity in December: 54%

The months with the highest relative humidity are February, March and May (56%).
The month with the lowest relative humidity is August (41%).

Average rainfall in December
Sycamore Springs, CA

Average rainfall in December - Sycamore Springs, CA
  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is February (1.38").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in December
Sycamore Springs, CA

Average rainfall days in December - Sycamore Springs, CA
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.6 days).

Average snowfall in December
Sycamore Springs, CA

Average snowfall in December - Sycamore Springs, 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
Sycamore Springs, CA

Average snowfall days in December - Sycamore Springs, 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
Sycamore Springs, CA

Average daylight in December / Average sunshine in December - Sycamore Springs, CA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 42min).

Average sunshine days in December
Sycamore Springs, CA

Average sunshine days in December - Sycamore Springs, CA
  • Average sunshine days in December: 24.2 days

The month with the most sunshine days is October (27.4 days).
The month with the least sunshine days is February (20.9 days).

Average UV index in December
Sycamore Springs, CA

Average UV index in December - Sycamore Springs, CA
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 3).

Average cloud cover in December
Sycamore Springs, CA

Average cloud cover in December - Sycamore Springs, CA
  • Average cloud cover in December: 25

The months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 6).

Average visibility in December
Sycamore Springs, CA

Average visibility in December - Sycamore Springs, 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).

Sycamore Springs, California, USA

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