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, with its high-temperature average of 58.6°F (14.8°C) and a low-temperature average of 41°F (5°C), is the coldest month.Humidity
In Sycamore Hills, the average relative humidity in December is 54%.Rainfall
In December, in Sycamore Hills, the rain falls for 6 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, in Sycamore Hills, there are 54 rainfall days, and 6.61" (168mm) of precipitation is accumulated.Snowfall
December is the only month when snow falls. The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.04" (1mm) of snow.Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of December in Sycamore Hills, sunrise is at 6:34 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 4:50 pm PST.
Sunshine
The months with the least sunshine in Sycamore Hills are February and December, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 in December converts into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Sycamore Hills?
What are December temperatures in Sycamore Hills?
What is the average humidity in December in Sycamore Hills?
How much does it rain in Sycamore Hills in December?
When does it snow the most in Sycamore Hills?
When does it start to snow in Sycamore Hills?
What is the month with the shortest days in Sycamore Hills?
How many hours of daylight does Sycamore Hills have in December?
When is the sunrise / sunset in December in Sycamore Hills?
What is the month with the least sunshine in Sycamore Hills?
How many hours of sunshine does Sycamore Hills have in December?
When is the lowest UV index in Sycamore Hills?
How high is the UV index in December in Sycamore Hills?
Average temperature in December
Sycamore Hills, CA
- Average high temperature in December: 58.6°F
The warmest month (with the highest average high temperature) is August (90.5°F).
The month with the lowest average high temperature is December (58.6°F).
- Average low temperature in December: 41°F
The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in December
Sycamore Hills, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Sycamore Hills, CA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in December
Sycamore Hills, CA
- Average humidity in December: 54%
The months with the highest relative humidity are February, March and May (56%).
The month with the lowest relative humidity is August (41%).
Average rainfall in December
Sycamore Hills, CA
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is February (1.38").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Sycamore Hills, CA
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.6 days).
Average snowfall in December
Sycamore Hills, CA
- Average snowfall in December: 0.04"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Sycamore Hills, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Sycamore Hills, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 42min).
Average sunshine days in December
Sycamore Hills, CA
- Average sunshine days in December: 24.2 days
The month with the most sunshine days is October (27.4 days).
The month with the least sunshine days is February (20.9 days).
Average UV index in December
Sycamore Hills, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Sycamore Hills, CA
- Average cloud cover in December: 25
The months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Sycamore Hills, 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).
Sycamore Hills, California, USA
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