December weather forecast and climate
Montalvo, CA

Weather in December

December, the first month of the winter, in Montalvo, is also a moderate month, with average temperature varying between 50°F (10°C) and 59.5°F (15.3°C).

Temperature

In Montalvo, the average high-temperature in December marginally drops, from an enjoyable 64.9°F (18.3°C) in November, to a mild 59.5°F (15.3°C). In Montalvo, the average low-temperature is 50°F (10°C).

Humidity

In Montalvo, the average relative humidity is 59%.

Rainfall

In Montalvo, during 5.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 47.8 rainfall days, and 6.97" (177mm) of precipitation is accumulated.

Daylight

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

Sunshine

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

UV index

The month with the lowest UV index in Montalvo is December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in December in Montalvo?

In December, in Montalvo, the average high-temperature is 59.5°F (15.3°C), and the average low-temperature is 50°F (10°C).

What is the average humidity in December in Montalvo?

The average relative humidity in December is 59%.

How much does it rain in Montalvo in December?

In Montalvo, in December, during 5.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

What is the month with the shortest days in Montalvo?

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

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

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

What is the month with the least sunshine in Montalvo?

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

How many hours of sunshine does Montalvo have in December?

In December, the average sunshine is 6.8h.

What is the month with the lowest UV index in Montalvo?

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

What is the UV index intensity in December in Montalvo?

In December, the average daily maximum UV index in Montalvo, California, is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in December
Montalvo, CA

Average temperature in December - Montalvo, CA
  • Average high temperature in December: 59.5°F

The warmest months (with the highest average high temperature) are August and September (74.3°F).
The month with the lowest average high temperature is February (59°F).

  • Average low temperature in December: 50°F

The month with the highest average low temperature is August (62.6°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).

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Average pressure in December
Montalvo, CA

Average pressure in December - Montalvo, CA
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is September (29.9").

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Average wind speed in December
Montalvo, CA

Average wind speed in December - Montalvo, CA
  • Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).

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Average humidity in December
Montalvo, CA

Average humidity in December - Montalvo, CA
  • Average humidity in December: 59%

Months with the highest relative humidity are June and July (69%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in December
Montalvo, CA

Average rainfall in December - Montalvo, CA
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is January (1.34").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in December
Montalvo, CA

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

The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is August (2.1 days).

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

Average daylight in December / Average sunshine in December - Montalvo, 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
Montalvo, CA

Average sunshine days in December - Montalvo, CA
  • Average sunshine days in December: 24.6 days

The month with the most sunshine days is October (26 days).
The month with the least sunshine days is July (20.4 days).

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Average UV index in December
Montalvo, CA

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

The month with the highest UV index is August (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Montalvo, CA

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

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

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Average visibility in December
Montalvo, CA

Average visibility in December - Montalvo, 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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