December weather forecast
Knights Ferry, CA

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Weather in December

The first month of the winter, December, is still a cool month in Knights Ferry, California, with an average temperature fluctuating between 38.3°F (3.5°C) and 54.5°F (12.5°C).

Temperature

Knights Ferry's December weather, marked by an average high temperature of 54.5°F (12.5°C) and an average low temperature of 38.3°F (3.5°C), is the coldest in the year.

Humidity

In December, the average relative humidity is 67%.

Rainfall

In Knights Ferry, during December, the rain falls for 9.4 days and regularly aggregates up to 3.78" (96mm) of precipitation. Throughout the year, there are 72.8 rainfall days, and 20.91" (531mm) of precipitation is accumulated.

Snowfall

February and December are months with snowfall. December is the month with the most snowfall. Snow falls for 0.2 days and accumulates 0.28" (7mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:00 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:54 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 5.9h of sunshine.

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 value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 3 during December translates into the following guidance:
Exercise prevention - Warding off sunburn is urged. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

December, recording an average high temperature of 54.5°F (12.5°C) and a low temperature of 38.3°F (3.5°C), is Knights Ferry's coldest month.

What is the usual temperature for Knights Ferry in December?

The average high-temperature, in December, in Knights Ferry, is 54.5°F (12.5°C), while the average low-temperature is 38.3°F (3.5°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in June is estimated at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 67%.

How many days does it rain in December?

In December, the rain falls for 9.4 days. Throughout December, 3.78" (96mm) of precipitation is accumulated.

What is the snowiest month?

December is the month with the most snowfall. Snow falls for 0.2 days and accumulates 0.28" (7mm) of snow.

When does it start to snow?

December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.28" (7mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

How many hours of daylight does Knights Ferry have in December?

The average day length in December is 9h and 36min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:00 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:54 pm PST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.9h of sunshine.

How many hours of sunshine does Knights Ferry have in December?

In December, the average sunshine duration is 5.9h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Knights Ferry, CA

Average temperature in December - Knights Ferry, CA
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is July (93.6°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).

Average pressure in December
Knights Ferry, CA

Average pressure in December - Knights Ferry, CA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Knights Ferry, CA

Average wind speed in December - Knights Ferry, CA
  • Average wind speed in December: 4.7mph

The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).

Average humidity in December
Knights Ferry, CA

Average humidity in December - Knights Ferry, CA
  • Average humidity in December: 67%

The month with the highest relative humidity is March (70%).
The month with the lowest relative humidity is July (32%).

Average rainfall in December
Knights Ferry, CA

Average rainfall in December - Knights Ferry, CA
  • Average rainfall in December: 3.78"

The wettest month (with the highest rainfall) is March (4.17").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in December
Knights Ferry, CA

Average rainfall days in December - Knights Ferry, CA
  • Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is March (12.7 days).
The month with the least rainy days is August (1 days).

Average snowfall in December
Knights Ferry, CA

Average snowfall in December - Knights Ferry, CA
  • Average snowfall in December: 0.28"

The month with the highest snowfall is December (0.28").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Knights Ferry, CA

Average snowfall days in December - Knights Ferry, CA
  • Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is December (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Knights Ferry, CA

Average daylight in December / Average sunshine in December - Knights Ferry, CA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in December
Knights Ferry, CA

Average sunshine days in December - Knights Ferry, CA
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is August (29.1 days).
The month with the least sunshine days is March (17.8 days).

Average UV index in December
Knights Ferry, CA

Average UV index in December - Knights Ferry, CA
  • Average UV index in December: 3

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in December
Knights Ferry, CA

Average cloud cover in December - Knights Ferry, CA
  • Average cloud cover in December: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in December
Knights Ferry, CA

Average visibility in December - Knights Ferry, CA
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Knights Ferry, California, USA

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