December weather forecastRancho Rinconada, CA
December
Weather in December
The first month of the winter, December, is still a refreshing month in Rancho Rinconada, California, with temperature in the range of an average high of 57°F (13.9°C) and an average low of 44.4°F (6.9°C).Temperature
Temperature records mark December as the coldest month, with highs averaging 57°F (13.9°C) and lows at 44.4°F (6.9°C).Humidity
The average relative humidity in December in Rancho Rinconada is 71%.Rainfall
In December, the rain falls for 8.2 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. In Rancho Rinconada, during the entire year, the rain falls for 53.6 days and collects up to 5.39" (137mm) of precipitation.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 7:04 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:22 am and sunset at 5:00 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.9h of sunshine.UV index
The months with the lowest UV index in Rancho Rinconada are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rancho Rinconada, CA
- Average high temperature in December: 57°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (57°F).
- Average low temperature in December: 44.4°F
The month with the highest average low temperature is August (56.1°F).
The coldest months (with the lowest average low temperature) are February and March (44.2°F).
Average pressure in December
Rancho Rinconada, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in December
Rancho Rinconada, CA
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).
Average humidity in December
Rancho Rinconada, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July, September and October (64%).
Average rainfall in December
Rancho Rinconada, CA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is February (1.02").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Rancho Rinconada, CA
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is March (9 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
Rancho Rinconada, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 54min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
Rancho Rinconada, CA
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is August (28.5 days).
The months with the least sunshine days are February and March (20.8 days).
Average UV index in December
Rancho Rinconada, CA
- Average UV index in December: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Rancho Rinconada, CA
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in December
Rancho Rinconada, 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).
