December weather forecast
Duncans Mills, CA

Weather in December

The first month of the winter, December, is still a mild month in Duncans Mills, California, with average temperature ranging between max 56.3°F (13.5°C) and min 41.4°F (5.2°C).

Temperature

December is the coldest month, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 41.4°F (5.2°C).

Humidity

The average relative humidity in Duncans Mills is 76%.

Rainfall

In December, in Duncans Mills, the rain falls for 8.6 days. Throughout December, 2.32" (59mm) of precipitation is accumulated. Throughout the year, in Duncans Mills, California, there are 60.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.

Daylight

The month with the shortest days in Duncans Mills is December, with an average of 9.5h of daylight.

Sunshine

With an average of 5.4h of sunshine, December has the least sunshine of the year.

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 value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sun damage is advised. 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 Duncans Mills?

December is the coldest month, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 41.4°F (5.2°C).

What is the average humidity in December in Duncans Mills?

In December, the average relative humidity in Duncans Mills, California, is 76%.

How much does it rain in Duncans Mills in December?

In Duncans Mills, California, during December, the rain falls for 8.6 days and regularly aggregates up to 2.32" (59mm) of precipitation.

What is the month with the shortest days in Duncans Mills?

The month with the shortest days in Duncans Mills is December, with an average of 9.5h of daylight.

How many hours of daylight does Duncans Mills have in December?

The average length of the day in December in Duncans Mills, California, is 9.5h.

What is the month with the least sunshine in Duncans Mills?

With an average of 5.4h of sunshine, December has the least sunshine of the year in Duncans Mills.

How many hours of sunshine does Duncans Mills have in December?

The average sunshine in December in Duncans Mills is 5.4h.

When is the lowest UV index in Duncans Mills?

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

How high is the UV index in December in Duncans Mills?

The average daily maximum UV index in December in Duncans Mills is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in December
Duncans Mills, CA

Average temperature in December - Duncans Mills, CA
  • Average high temperature in December: 56.3°F

The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in December: 41.4°F

Months with the highest average low temperature are August and September (53.4°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in December
Duncans Mills, CA

Average pressure in December - Duncans Mills, CA
  • Average pressure in December: 30.1"

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
Duncans Mills, CA

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

The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (5mph).

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Average humidity in December
Duncans Mills, CA

Average humidity in December - Duncans Mills, CA
  • Average humidity in December: 76%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).

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Average rainfall in December
Duncans Mills, CA

Average rainfall in December - Duncans Mills, CA
  • Average rainfall in December: 2.32"

The wettest month (with the highest rainfall) is February (3.27").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Duncans Mills, CA

Average rainfall days in December - Duncans Mills, CA
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).

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Average daylight in December /
Average sunshine in December
Duncans Mills, CA

Average daylight in December / Average sunshine in December - Duncans Mills, CA
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.4h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in December
Duncans Mills, CA

Average sunshine days in December - Duncans Mills, CA
  • Average sunshine days in December: 21.3 days

The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is February (19.9 days).

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Average UV index in December
Duncans Mills, CA

Average UV index in December - Duncans Mills, CA
  • Average UV index in December: 3

Months with the highest UV index are June, July and August (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
Duncans Mills, CA

Average cloud cover in December - Duncans Mills, CA
  • Average cloud cover in December: 39

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in December
Duncans Mills, CA

Average visibility in December - Duncans Mills, 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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