December weather forecastYucaipa, CA
December
Weather in December
December, the first month of the winter in Yucaipa, is also a moderate month, with an average temperature fluctuating between 56.3°F (13.5°C) and 40.1°F (4.5°C).Temperature
Yucaipa's coldest month, December, registers temperatures that range from a high of 56.3°F (13.5°C) to a low of 40.1°F (4.5°C).Humidity
In Yucaipa, the average relative humidity in December is 52%.Rainfall
In December, in Yucaipa, the rain falls for 6.1 days. Throughout December, 1.3" (33mm) of precipitation is accumulated. In Yucaipa, during the entire year, the rain falls for 49.3 days and collects up to 6.69" (170mm) of precipitation.Snowfall
February through April, November and December are months with snowfall in Yucaipa. December is the last month it regularly snows. During 0.3 snowfall days, in December, Yucaipa aggregates 0.28" (7mm) of snow. In Yucaipa, California, during the entire year, snow falls for 2.6 days and aggregates up to 2.05" (52mm) 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 in Yucaipa, sunrise is at 6:36 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:49 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index in Yucaipa are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 3 suggests this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Yucaipa, CA
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in December
Yucaipa, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Yucaipa, CA
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is September (5.2mph).
Average humidity in December
Yucaipa, CA
- Average humidity in December: 52%
The month with the highest relative humidity is February (54%).
The month with the lowest relative humidity is August (36%).
Average rainfall in December
Yucaipa, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is February (1.38").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Yucaipa, CA
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.4 days).
Average snowfall in December
Yucaipa, CA
- Average snowfall in December: 0.28"
The month with the highest snowfall is November (0.87").
The months with the least snowfall are January, May, June, July, August, September and October (0").
Average snowfall days in December
Yucaipa, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are January, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Yucaipa, 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 42min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Yucaipa, CA
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is June (27.6 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in December
Yucaipa, 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
Yucaipa, CA
- Average cloud cover in December: 24
The months with the most cloud cover are February, March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Yucaipa, 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).
