December weather forecast
Etiwanda, CA

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Weather in December

December, the first month of the winter in Etiwanda, is still a refreshing month, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 61.7°F (16.5°C).

Temperature

December is the coldest month, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.3°F (7.4°C).

Humidity

The average relative humidity in December is 51%.

Rainfall

In Etiwanda, during December, the rain falls for 5.5 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, in Etiwanda, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.

Snowfall

In Etiwanda, snow does not fall in January, March through December.

Daylight

The month with the shortest days in Etiwanda is December, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 6:38 am and sunset at 4:40 pm. On the last day of December, in Etiwanda, California, sunrise is at 6:55 am and sunset at 4:51 pm PST.

Sunshine

The months with the least sunshine in Etiwanda are February and December, with an average of 6.9h of sunshine.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 3 in December translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What time of the year is the coldest in Etiwanda?

The coldest period in Etiwanda tends to be December, when average temperatures fluctuate between a high of 61.7°F (16.5°C) and a low of 45.3°F (7.4°C).

What is the usual temperature for Etiwanda in December?

The high-temperature, in December, in Etiwanda, records 61.7°F (16.5°C), while the low-temperature is 45.3°F (7.4°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is estimated at 89.6°F (32°C).

What is the average humidity in December in Etiwanda?

In Etiwanda, the average relative humidity in December is 51%.

How much does it rain in Etiwanda in December?

In Etiwanda, in December, during 5.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated.

When it does not snow in Etiwanda?

In Etiwanda, snow does not fall in January, March through December.

What is the month with the shortest days in Etiwanda?

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

How many hours of daylight does Etiwanda have in December?

The average day length in December in Etiwanda is 9h and 55min.

What time are sunrise and sunset in December in Etiwanda?

On the first day of December in Etiwanda, California, sunrise is at 6:38 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:51 pm PST.

What are the months with the least sunshine in Etiwanda?

February and December, with an average of 6.9h of sunshine, are months with the least sunshine in Etiwanda, California.

How long on average sun shines in December in Etiwanda?

In Etiwanda, the average sunshine duration in December is 6.9h.

When is the lowest UV index in Etiwanda?

The month with the lowest UV index in Etiwanda is December, with an average maximum UV index of 3.

What is the UV index intensity in December in Etiwanda?

The average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to 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
Etiwanda, CA

Average temperature in December - Etiwanda, CA
  • Average high temperature in December: 61.7°F

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in December: 45.3°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

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Average pressure in December
Etiwanda, CA

Average pressure in December - Etiwanda, 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 (29.86"Hg).

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Average wind speed in December
Etiwanda, CA

Average wind speed in December - Etiwanda, CA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in December
Etiwanda, CA

Average humidity in December - Etiwanda, CA
  • Average humidity in December: 51%

The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in December
Etiwanda, CA

Average rainfall in December - Etiwanda, CA
  • Average rainfall in December: 0.91"

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Etiwanda, CA

Average rainfall days in December - Etiwanda, CA
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days in December
Etiwanda, CA

Average snowfall days in December - Etiwanda, CA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in December / Average sunshine in December - Etiwanda, 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 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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Average sunshine days in December
Etiwanda, CA

Average sunshine days in December - Etiwanda, CA
  • Average sunshine days in December: 24.4 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

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Average UV index in December
Etiwanda, CA

Average UV index in December - Etiwanda, CA
  • Average UV index in December: 3

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Etiwanda, CA

Average cloud cover in December - Etiwanda, CA
  • Average cloud cover in December: 21

The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Etiwanda, CA

Average visibility in December - Etiwanda, 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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Etiwanda, California, USA

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