December weather forecast and climate
Novato, CA

Weather in December

The first month of the winter, December, is also a fresh month in Novato, California, with average temperature varying between 43.9°F (6.6°C) and 55.2°F (12.9°C).

Temperature

With an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 43.9°F (6.6°C), December is the coldest month.

Humidity

In December, the average relative humidity in Novato is 74%.

Rainfall

In Novato, during December, the rain falls for 9.5 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, in Novato, there are 68.4 rainfall days, and 7.28" (185mm) of precipitation is accumulated.

Daylight

With an average of 9.6h of daylight, December has the shortest days of the year.

Sunshine

December has the least sunshine of the year in Novato, California, with an average of 5.6h 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 estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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 Novato?

With an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 43.9°F (6.6°C), December is the coldest month in Novato.

What is the temperature in December in Novato?

In Novato, California, in December, the average high-temperature is 55.2°F (12.9°C), and the average low-temperature is 43.9°F (6.6°C).

What is the average humidity in December in Novato?

The average relative humidity in December in Novato, California, is 74%.

How many days does it rain in December in Novato?

In December, in Novato, California, the rain falls for 9.5 days. Throughout December, 1.22" (31mm) of precipitation is accumulated.

What is the month with the shortest days in Novato?

With an average of 9.6h of daylight, December has the shortest days of the year.

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

In December, the average length of the day in Novato, California, is 9.6h.

What is the month with the least sunshine in Novato?

The month with the least sunshine in Novato, California, is December, with an average of 5.6h of sunshine.

How long on average sun shines in December in Novato?

In December, the average sunshine in Novato is 5.6h.

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

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

What is the UV index reading in December in Novato?

In December, the average daily maximum UV index in Novato, California, is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Novato, CA

Average temperature in December - Novato, CA
  • Average high temperature in December: 55.2°F

The warmest month (with the highest average high temperature) is September (75.4°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in December: 43.9°F

The month with the highest average low temperature is September (55.8°F).
The coldest month (with the lowest average low temperature) is December (43.9°F).

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Average pressure in December
Novato, CA

Average pressure in December - Novato, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in December
Novato, CA

Average wind speed in December - Novato, CA
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).

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Average humidity in December
Novato, CA

Average humidity in December - Novato, CA
  • Average humidity in December: 74%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (66%).

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Average rainfall in December
Novato, CA

Average rainfall in December - Novato, CA
  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is February (1.65").
The driest months (with the least rainfall) are July, August and September (0.08").

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Average rainfall days in December
Novato, CA

Average rainfall days in December - Novato, CA
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (2 days).

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

Average daylight in December / Average sunshine in December - Novato, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 5.6h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 5.6h).

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Average sunshine days in December
Novato, CA

Average sunshine days in December - Novato, CA
  • Average sunshine days in December: 20.6 days

The month with the most sunshine days is October (24.9 days).
The month with the least sunshine days is March (18.5 days).

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Average UV index in December
Novato, CA

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

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Novato, CA

Average cloud cover in December - Novato, CA
  • Average cloud cover in December: 37

The month with the most cloud cover is March (Cloud cover 38).
Months with the least cloud cover are July and September (Cloud cover 14).

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Average visibility in December
Novato, CA

Average visibility in December - Novato, 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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