December weather forecast and climate
Yucaipa, CA

Weather in December

December, the first month of the winter, in Yucaipa, is still a mild month, with average temperature varying between 56.3°F (13.5°C) and 40.1°F (4.5°C).

Temperature

December is the coldest month, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 40.1°F (4.5°C).

Humidity

The average relative humidity in Yucaipa is 52%.

Rainfall

In Yucaipa, during 6.1 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, in Yucaipa, there are 49.3 rainfall days, and 6.69" (170mm) of precipitation is accumulated.

Snowfall

February through April, November and December are months with snowfall in Yucaipa, California. December is the last month it regularly snows. During 0.3 snowfall days, Yucaipa aggregates 0.28" (7mm) of snow. In Yucaipa, during the entire year, snow falls for 2.6 days, and aggregates up to 2.05" (52mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9.9h of daylight.

Sunshine

The month with the least sunshine in Yucaipa is December, with an average of 6.7h of sunshine.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 3 in December interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Yucaipa?

The coldest month in Yucaipa, California, is December, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 40.1°F (4.5°C).

What is the temperature in December in Yucaipa?

The average high-temperature, in December, is 56.3°F (13.5°C), while the average low-temperature is 40.1°F (4.5°C).

What is the average humidity in December in Yucaipa?

The average relative humidity in December in Yucaipa is 52%.

How many days does it rain in December in Yucaipa?

In December, in Yucaipa, California, the rain falls for 6.1 days. Throughout December, 1.3" (33mm) of precipitation is accumulated.

What is the last month it snows in Yucaipa?

December is the last month it regularly snows. During 0.3 snowfall days, in December, Yucaipa aggregates 0.28" (7mm) of snow.

What is the month with the shortest days in Yucaipa?

The month with the shortest days is December, with an average of 9.9h of daylight.

How many hours of daylight does Yucaipa have in December?

The average length of the day in December in Yucaipa, California, is 9.9h.

What is the month with the least sunshine in Yucaipa?

With an average of 6.7h of sunshine, December has the least sunshine of the year in Yucaipa, California.

How long on average sun shines in December in Yucaipa?

The average sunshine in December in Yucaipa, California, is 6.7h.

What are the months with the lowest UV index in Yucaipa?

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

What is the UV index intensity in December in Yucaipa?

The average daily maximum UV index in December in Yucaipa is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in December
Yucaipa, CA

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).

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Average pressure in December
Yucaipa, CA

Average pressure in December - Yucaipa, CA
  • Average pressure in December: 30.07"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.83").

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Average wind speed in December
Yucaipa, CA

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).

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Average humidity in December
Yucaipa, CA

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%).

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Average rainfall in December
Yucaipa, CA

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").

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Average rainfall days in December
Yucaipa, CA

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).

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Average snowfall in December
Yucaipa, CA

Average snowfall in December - Yucaipa, CA
  • Average snowfall in December: 0.28"

The month with the highest snowfall is November (0.87").
Months with the least snowfall are January, May, June, July, August, September and October (0").

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Average snowfall days in December
Yucaipa, CA

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).
Months with the least snowfall days are January, May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Yucaipa, CA

Average daylight in December / Average sunshine in December - Yucaipa, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.7h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in December
Yucaipa, CA

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).

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Average UV index in December
Yucaipa, CA

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).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Yucaipa, CA

Average cloud cover in December - Yucaipa, CA
  • Average cloud cover in December: 24

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).

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Average visibility in December
Yucaipa, CA

Average visibility in December - Yucaipa, CA
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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