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
Sylmar, California, reaches its lowest average temperatures in December, measuring 61.7°F (16.5°C) at the peak and 46.2°F (7.9°C) at the lowest.Humidity
In Sylmar, the average relative humidity in December is 52%.Rainfall
In Sylmar, California, during December, the rain falls for 5 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Sylmar, during the entire year, the rain falls for 39.8 days and collects up to 7.52" (191mm) of precipitation.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:42 am and sunset at 4:43 pm. On the last day of December, sunrise is at 6:59 am and sunset at 4:54 pm PST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 6.8h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum daily UV index of 3 during December morphs into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. When the Sun is at its strongest around midday, find shade and limit exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What part of the year is the coldest in Sylmar?
What is the temperature in December in Sylmar?
What is the average humidity in December in Sylmar?
How many days does it rain in December in Sylmar?
What is the month with the shortest days in Sylmar?
What is the average length of the day in December in Sylmar?
What time are sunrise and sunset in December in Sylmar?
What are the months with the least sunshine in Sylmar?
How long on average sun shines in December in Sylmar?
When is the lowest UV index in Sylmar?
What is the UV index reading in December in Sylmar?
Average temperature in December
Sylmar, CA
- Average high temperature in December: 61.7°F
The warmest month (with the highest average high temperature) is August (85.8°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in December: 46.2°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).
Average pressure in December
Sylmar, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Sylmar, CA
- Average wind speed in December: 6.2mph
The windiest months (with the highest average wind speed) are January and December (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in December
Sylmar, CA
- Average humidity in December: 52%
The month with the highest relative humidity is June (58%).
The month with the lowest relative humidity is November (47%).
Average rainfall in December
Sylmar, CA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is February (1.54").
The driest month (with the least rainfall) is June (0").
Average rainfall days in December
Sylmar, CA
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.8 days).
Average daylight in December /
Average sunshine in December
Sylmar, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in December
Sylmar, CA
- Average sunshine days in December: 25.2 days
The month with the most sunshine days is May (28.8 days).
The month with the least sunshine days is February (22.9 days).
Average UV index in December
Sylmar, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Sylmar, CA
- Average cloud cover in December: 21
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in December
Sylmar, 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).
Sylmar, California, USA
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