December weather forecastKnights Ferry, CA
December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 9h and 36min
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 54min
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: 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: 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: 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: 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).
