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 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, with its high-temperature average of 52.7°F (11.5°C) and a low-temperature average of 39.4°F (4.1°C), is the coldest month.Humidity
In Stonyford, the average relative humidity in December is 67%.Rainfall
In Stonyford, during December, the rain falls for 10 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Stonyford, during the entire year, the rain falls for 71.4 days and collects up to 14.02" (356mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:57 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h 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 reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 3 during December translates into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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 December temperatures?
What is the average humidity in December?
How many days does it rain in December?
What is the month with the shortest days in Stonyford?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December in Stonyford?
Average temperature in December
Stonyford, CA
- Average high temperature in December: 52.7°F
The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in December: 39.4°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 (39.4°F).
Average pressure in December
Stonyford, CA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, July and August (29.91"Hg).
Average wind speed in December
Stonyford, CA
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Stonyford, CA
- Average humidity in December: 67%
The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are July, August and September (35%).
Average rainfall in December
Stonyford, CA
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is February (2.68").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Stonyford, CA
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is July (1 days).
Average daylight in December /
Average sunshine in December
Stonyford, CA
- Average daylight in December: 9h and 2min
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 24min).
- 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 48min).
Average sunshine days in December
Stonyford, CA
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (17 days).
Average UV index in December
Stonyford, 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
Stonyford, CA
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Stonyford, 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).
Stonyford, California, USA
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