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 tends to be the coldest month, with temperatures averaging a daily high of 51.4°F (10.8°C) and a low of 35.1°F (1.7°C).Humidity
In December, the average relative humidity is 65%.Rainfall
In December, the rain falls for 9.6 days. Throughout December, 4.33" (110mm) of precipitation is accumulated. In Coulterville, during the entire year, the rain falls for 79.1 days and collects up to 27.32" (694mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 1.4 days. Throughout December, 1.14" (29mm) of snow is accumulated. Throughout the year, there are 9.6 snowfall days, and 20.67" (525mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:57 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:15 am and sunset at 4:52 pm PST.
Sunshine
With an average of 6.1h of sunshine, December has the least sunshine of the year in Coulterville.UV index
The average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 3 during December translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
What is the temperature 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?
What time 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
Coulterville, CA
- Average high temperature in December: 51.4°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (51.4°F).
- Average low temperature in December: 35.1°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is December (35.1°F).
Average pressure in December
Coulterville, 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
Coulterville, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is February (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in December
Coulterville, CA
- Average humidity in December: 65%
The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in December
Coulterville, CA
- Average rainfall in December: 4.33"
The wettest month (with the highest rainfall) is March (5.31").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Coulterville, CA
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is March (14 days).
The month with the least rainy days is August (1.2 days).
Average snowfall in December
Coulterville, CA
- Average snowfall in December: 1.14"
The month with the highest snowfall is February (8.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Coulterville, CA
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Coulterville, 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: 6h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Coulterville, CA
- Average sunshine days in December: 19.8 days
The months with the most sunshine days are July and August (28.8 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in December
Coulterville, 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
Coulterville, CA
- Average cloud cover in December: 30
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Coulterville, 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).
Coulterville, California, USA
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