December weather forecast
Yucaipa, CA

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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.
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Frequently asked questions

What part of the year is the coldest in Yucaipa?

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

What are December temperatures in Yucaipa?

The high-temperature, in December, in Yucaipa, records 56.3°F (13.5°C), while the low-temperature is 40.1°F (4.5°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in June is estimated at 84.2°F (29°C).

What is the average humidity in December in Yucaipa?

The average relative humidity in December is 52%.

How much does it rain in Yucaipa in December?

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?

December has the shortest days of the year, with an average of 9h and 54min of daylight.

How many hours of daylight does Yucaipa have in December?

In December, the average day length in Yucaipa, California, is 9h and 56min.

When is the sunrise / sunset in December in Yucaipa?

In December, on the first day of the month, sunrise is at 6:36 am and sunset at 4:38 pm. On the last day of the month, in Yucaipa, sunrise is at 6:53 am and sunset at 4:49 pm PST.

What is the month with the least sunshine in Yucaipa?

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

How many hours of sunshine does Yucaipa have in December?

In December, the average sunshine duration in Yucaipa, California, is 6.7h.

When is the lowest UV index in Yucaipa?

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

How high is the UV index in December in Yucaipa?

In December, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"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).

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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").
The 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).
The 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: 9h and 5min

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 4min

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).

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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).
The 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

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).

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Average visibility in December
Yucaipa, CA

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).

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Yucaipa, California, USA

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