December weather forecastLeona Valley, CA
December
Weather in December
December, the first month of the winter in Leona Valley, is still a cool month, with an average temperature fluctuating between 54.5°F (12.5°C) and 37.8°F (3.2°C).Temperature
December, on average, is the coldest month, registering a high temperature of 54.5°F (12.5°C) and a low of 37.8°F (3.2°C).Humidity
With an average relative humidity of 54%, December is the most humid month.Rainfall
The month with the most rainfall in Leona Valley is December, when the rain falls for 5.8 days and typically aggregates up to 1.34" (34mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Leona Valley, California. The month with the most snowfall in Leona Valley is December, when snow falls for 0.3 days and typically aggregates up to 2.01" (51mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December in Leona Valley, sunrise is at 6:42 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:53 pm PST.
Sunshine
In Leona Valley, the average sunshine in December is 7h.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 estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 3 during December translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Leona Valley, CA
- Average high temperature in December: 54.5°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in December: 37.8°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 (37.8°F).
Average pressure in December
Leona Valley, CA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Leona Valley, CA
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is May (9.3mph).
The calmest month (with the lowest average wind speed) is January (6.7mph).
Average humidity in December
Leona Valley, CA
- Average humidity in December: 54%
The month with the highest relative humidity is December (54%).
The month with the lowest relative humidity is August (31%).
Average rainfall in December
Leona Valley, CA
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is December (1.34").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Leona Valley, CA
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.1 days).
Average snowfall in December
Leona Valley, CA
- Average snowfall in December: 2.01"
The month with the highest snowfall is December (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Leona Valley, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Leona Valley, 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: 7h and 0min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).
Average sunshine days in December
Leona Valley, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (28.1 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in December
Leona Valley, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Leona Valley, CA
- Average cloud cover in December: 21
The months with the most cloud cover are March and December (Cloud cover 21).
The months with the least cloud cover are June, August and September (Cloud cover 5).
Average visibility in December
Leona Valley, 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).
