December weather forecast and climate
Jenner, CA

Weather in December

The first month of the winter, December, is still a mild month in Jenner, California, with average temperature ranging between min 41.4°F (5.2°C) and max 56.3°F (13.5°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 Jenner is 76%.

Rainfall

In Jenner, in December, during 8.6 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Jenner, during the entire year, the rain falls for 60.1 days and collects up to 12.87" (327mm) of precipitation.

Daylight

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

Sunshine

The month with the least sunshine is December, with an average of 5.4h of sunshine.

UV index

Months with the lowest UV index in Jenner are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 coldest month in Jenner?

The coldest month is December, 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 temperature in December in Jenner?

The average high-temperature, in December, in Jenner, is 56.3°F (13.5°C), while the average low-temperature is 41.4°F (5.2°C).

What is the average humidity in December in Jenner?

In December, the average relative humidity is 76%.

How many days does it rain in December in Jenner?

In Jenner, California, in December, during 8.6 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

What is the month with the shortest days in Jenner?

December has the shortest days of the year in Jenner, with an average of 9.5h of daylight.

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

In Jenner, California, the average length of the day in December is 9.5h.

What is the month with the least sunshine in Jenner?

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

How long on average sun shines in December in Jenner?

In Jenner, the average sunshine in December is 5.4h.

When is the lowest UV index in Jenner?

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

What is the UV index intensity in December in Jenner?

In December, the average daily maximum UV index in Jenner is 3. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in December
Jenner, CA

Average temperature in December - Jenner, 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
Jenner, CA

Average pressure in December - Jenner, 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
Jenner, CA

Average wind speed in December - Jenner, 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
Jenner, CA

Average humidity in December - Jenner, 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
Jenner, CA

Average rainfall in December - Jenner, 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
Jenner, CA

Average rainfall days in December - Jenner, 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
Jenner, CA

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

Average sunshine days in December - Jenner, 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
Jenner, CA

Average UV index in December - Jenner, 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
Jenner, CA

Average cloud cover in December - Jenner, 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
Jenner, CA

Average visibility in December - Jenner, 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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