December weather forecast and climate
Montebello, CA

Weather in December

December, the first month of the winter, in Montebello, is still a comfortable month, with average temperature ranging between min 49.6°F (9.8°C) and max 64.9°F (18.3°C).

Temperature

The coldest month is December, with an average high-temperature of 64.9°F (18.3°C) and an average low-temperature of 49.6°F (9.8°C).

Humidity

The average relative humidity in Montebello is 52%.

Rainfall

The month with the most rainfall is December when the rain falls for 5.2 days and typically aggregates up to 1.3" (33mm) of precipitation.

Daylight

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

Sunshine

Months with the least sunshine in Montebello are January, February and December, with an average of 6.8h of sunshine.

UV index

Months with the lowest UV index in Montebello are January, February, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the coldest month in Montebello?

The coldest month is December, with an average high-temperature of 64.9°F (18.3°C) and an average low-temperature of 49.6°F (9.8°C).

What is the temperature in December in Montebello?

The average high-temperature, in December, is 64.9°F (18.3°C), while the average low-temperature is 49.6°F (9.8°C).

What is the average humidity in December in Montebello?

In December, the average relative humidity in Montebello is 52%.

How much does it rain in Montebello in December?

In Montebello, in December, it is raining for 5.2 days, with typically 1.3" (33mm) of accumulated precipitation.

What is the rainiest month in Montebello?

The month with the most rainfall in Montebello is December when the rain falls for 5.2 days and typically aggregates up to 1.3" (33mm) of precipitation.

What is the month with the shortest days in Montebello?

With an average of 9.9h of daylight, December has the shortest days of the year in Montebello, California.

What is the average length of the day in December in Montebello?

In Montebello, California, the average length of the day in December is 9.9h.

What is the month with the least sunshine in Montebello?

Months with the least sunshine in Montebello, California, are January, February and December, with an average of 6.8h of sunshine.

How many hours of sunshine does Montebello have in December?

In December, the average sunshine in Montebello, California, is 6.8h.

When is the lowest UV index in Montebello?

Months with the lowest UV index in Montebello are January, February, November and December, with an average maximum UV index of 4.

How high is the UV index in December in Montebello?

In December, the average daily maximum UV index in Montebello is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in December
Montebello, CA

Average temperature in December - Montebello, CA
  • Average high temperature in December: 64.9°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (64.9°F).

  • Average low temperature in December: 49.6°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).

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Average pressure in December
Montebello, CA

Average pressure in December - Montebello, 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 (29.88").

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Average wind speed in December
Montebello, CA

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

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.7mph).

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Average humidity in December
Montebello, CA

Average humidity in December - Montebello, CA
  • Average humidity in December: 52%

The month with the highest relative humidity is June (62%).
The month with the lowest relative humidity is November (48%).

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Average rainfall in December
Montebello, CA

Average rainfall in December - Montebello, CA
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Montebello, CA

Average rainfall days in December - Montebello, CA
  • Average rainfall days in December: 5.2 days

The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (1.2 days).

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

Average daylight in December / Average sunshine in December - Montebello, 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: 6.8h

Months with the most sunshine are July and August (Average sunshine: 12h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in December
Montebello, CA

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

The month with the most sunshine days is August (27.6 days).
The month with the least sunshine days is February (22.5 days).

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Average UV index in December
Montebello, CA

Average UV index in December - Montebello, CA
  • Average UV index in December: 4

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in December
Montebello, CA

Average cloud cover in December - Montebello, CA
  • Average cloud cover in December: 22

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Montebello, CA

Average visibility in December - Montebello, 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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