December weather forecast and climate
Fort Ross, CA

Weather in December

December, the first month of the winter, in Fort Ross, is still a mild month, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 56.3°F (13.5°C).

Temperature

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).

Humidity

In December, the average relative humidity is 76%.

Rainfall

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

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for the average person.
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 solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
[Resources]

FAQ

What is the coldest month in Fort Ross?

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 temperature in December in Fort Ross?

In December, in Fort Ross, the average high-temperature is 56.3°F (13.5°C), and the average low-temperature is 41.4°F (5.2°C).

What is the average humidity in December in Fort Ross?

In Fort Ross, California, the average relative humidity in December is 76%.

How much does it rain in Fort Ross in December?

In Fort Ross, 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 Fort Ross?

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

What is the average length of the day in December in Fort Ross?

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

What is the month with the least sunshine in Fort Ross?

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

How long on average sun shines in December in Fort Ross?

In Fort Ross, the average sunshine in December is 5.4h.

What is the month with the lowest UV index in Fort Ross?

Months with the lowest UV index in Fort Ross, California, are January, February, November and December, with an average maximum UV index of 3.

How high is the UV index in December in Fort Ross?

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

Average temperature in December
Fort Ross, CA

Average temperature in December - Fort Ross, 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).

[Resources]

Average pressure in December
Fort Ross, CA

Average pressure in December - Fort Ross, 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").

[Resources]

Average wind speed in December
Fort Ross, CA

Average wind speed in December - Fort Ross, 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).

[Resources]

Average humidity in December
Fort Ross, CA

Average humidity in December - Fort Ross, 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%).

[Resources]

Average rainfall in December
Fort Ross, CA

Average rainfall in December - Fort Ross, 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").

[Resources]

Average rainfall days in December
Fort Ross, CA

Average rainfall days in December - Fort Ross, 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).

[Resources]

Average daylight in December /
Average sunshine in December
Fort Ross, CA

Average daylight in December / Average sunshine in December - Fort Ross, 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).

[Resources]

Average sunshine days in December
Fort Ross, CA

Average sunshine days in December - Fort Ross, 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).

[Resources]

Average UV index in December
Fort Ross, CA

Average UV index in December - Fort Ross, 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).

[Resources]

Average cloud cover in December
Fort Ross, CA

Average cloud cover in December - Fort Ross, 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).

[Resources]

Average visibility in December
Fort Ross, CA

Average visibility in December - Fort Ross, 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).

[Resources]