December weather forecastValyermo, CA

December

Weather in December

December, the first month of the winter in Valyermo, is still a cool month, with temperature in the range of an average high of 54.1°F (12.3°C) and an average low of 38.7°F (3.7°C).

Temperature

December, with its average high-temperature of 54.1°F (12.3°C) and an average low-temperature of 38.7°F (3.7°C), holds the record as the coldest month.

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 53%.

Rainfall

December is the month with the most rainfall. Rain falls for 4.5 days and accumulates 1.38" (35mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. December is the month with the most snowfall. Snow falls for 1.5 days and accumulates 3.31" (84mm) of snow.

Daylight

With an average of 9h and 54min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:40 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 4:51 pm PST.

Sunshine

With an average of 6.8h of sunshine, December has the least sunshine of the year in Valyermo, California.

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 reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 during December translates into the following directions:
Be vigilant - Preventing sunburn is recommended. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.

Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

December, with average temperatures reaching a high of 54.1°F (12.3°C) and a low of 38.7°F (3.7°C), is the coldest month.

The high-temperature, in December, in Valyermo, is 54.1°F (12.3°C), while the low-temperature averages to 38.7°F (3.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in June is appraised at 84.2°F (29°C).

The months with the highest humidity are February and December, with an average relative humidity of 53%.

In December, the average relative humidity is 53%.

The month with the most rainfall is December, when the rain falls for 4.5 days and typically aggregates up to 1.38" (35mm) of precipitation.

In December, the rain falls for 4.5 days. Throughout December, 1.38" (35mm) of precipitation is accumulated.

The month with the most snowfall is December, when snow falls for 1.5 days and typically aggregates up to 3.31" (84mm) of snow.

In Valyermo, in December, during 1.5 snowfall days, 3.31" (84mm) of snow is typically accumulated.

The month with the shortest days is December, with an average of 9h and 54min of daylight.

The average day length in December is 9h and 54min.

On the first day of December, sunrise is at 6:40 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 4:51 pm PST.

With an average of 6.8h of sunshine, December has the least sunshine of the year.

The average sunshine duration in December is 6.8h.

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

In Valyermo, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

63.1°F

54.1°F

56.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7mph

6.8mph

7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

24.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Valyermo, CA

Average high temperature in December: 54.1°F

The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is December (54.1°F).

Average low temperature in December: 38.7°F

The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).

Average pressure in December
Valyermo, CA

Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in December
Valyermo, CA

Average wind speed in December: 6.3mph

The windiest month (with the highest average wind speed) is May (8mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).

Average humidity in December
Valyermo, CA

Average humidity in December: 53%

The months with the highest relative humidity are February and December (53%).
The month with the lowest relative humidity is August (34%).

Average rainfall in December
Valyermo, CA

Average rainfall in December: 1.38"

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

Average rainfall days in December
Valyermo, CA

Average rainfall days in December: 4.5 days

The month with the highest number of rainy days is March (5.2 days).
The month with the least rainy days is June (0.9 days).

Average snowfall in December
Valyermo, CA

Average snowfall in December: 3.31"

The month with the highest snowfall is December (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Valyermo, CA

Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.1 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
Valyermo, CA

Average daylight in December: 9h and 54min

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

Average sunshine in December: 6h and 48min

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

Average sunshine days in December
Valyermo, CA

Average sunshine days in December: 24.6 days

The month with the most sunshine days is June (28.4 days).
The month with the least sunshine days is February (22.9 days).

Average UV index in December
Valyermo, 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 January, February, November and December (UV index 3).

Average cloud cover in December
Valyermo, CA

Average cloud cover in December: 22

The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

Average visibility in December
Valyermo, 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).