December weather forecastMountain Ranch, CA
December
Weather in December
December, the first month of the winter in Mountain Ranch, is also a fresh month, with an average temperature varying between 53.6°F (12°C) and 37.8°F (3.2°C).Temperature
In Mountain Ranch, the lowest average temperatures are observed in December, with a high of 53.6°F (12°C) and a low of 37.8°F (3.2°C).Humidity
In Mountain Ranch, the average relative humidity in December is 68%.Rainfall
In Mountain Ranch, in December, it is raining for 9.1 days, with typically 2.95" (75mm) of accumulated precipitation. Throughout the year, there are 73.3 rainfall days, and 16.42" (417mm) of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine in Mountain Ranch is December, with an average of 6h of sunshine.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 value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 3 in December leads to these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mountain Ranch, CA
- Average high temperature in December: 53.6°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (53.6°F).
- Average low temperature in December: 37.8°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (37.8°F).
Average pressure in December
Mountain Ranch, CA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Mountain Ranch, CA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is February (5.6mph).
The calmest months (with the lowest average wind speed) are August and September (4.4mph).
Average humidity in December
Mountain Ranch, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (37%).
Average rainfall in December
Mountain Ranch, CA
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is March (3.39").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Mountain Ranch, CA
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (1.7 days).
Average daylight in December /
Average sunshine in December
Mountain Ranch, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
Mountain Ranch, CA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is July (28.2 days).
The month with the least sunshine days is March (16.9 days).
Average UV index in December
Mountain Ranch, 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
Mountain Ranch, CA
- Average cloud cover in December: 32
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Mountain 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).
