Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is the coldest month of the year, registering average temperatures as high as 52.9°F (11.6°C) and as low as 37.2°F (2.9°C).Humidity
In Finley, the average relative humidity in December is 73%.Rainfall
In Finley, in December, during 12.2 rainfall days, 3.62" (92mm) of precipitation is typically accumulated. Throughout the year, there are 88.1 rainfall days, and 20.28" (515mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Finley, in December, during 0.2 snowfall days, 0.08" (2mm) of snow is typically accumulated. Throughout the year, there are 1.8 snowfall days, and 1.26" (32mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:12 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:59 pm PST.
Sunshine
With an average of 5.3h of sunshine, December has the least sunshine of the year.UV index
In December, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 3 in December translates into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What are the temperatures in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Finley, CA
- Average high temperature in December: 52.9°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in December: 37.2°F
The months with the highest average low temperature are July and August (56.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in December
Finley, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in December
Finley, CA
- Average wind speed in December: 4.5mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).
Average humidity in December
Finley, CA
- Average humidity in December: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (48%).
Average rainfall in December
Finley, CA
- Average rainfall in December: 3.62"
The wettest month (with the highest rainfall) is February (3.94").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Finley, CA
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is March (15.2 days).
The month with the least rainy days is July (1.1 days).
Average snowfall in December
Finley, CA
- Average snowfall in December: 0.08"
The months with the highest snowfall are January and February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Finley, CA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Finley, CA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Finley, CA
- Average sunshine days in December: 18 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (14.3 days).
Average UV index in December
Finley, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in December
Finley, CA
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in December
Finley, CA
- Average visibility in December: 5mi
The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).
Finley, California, USA
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