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 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, recording an average high temperature of 60.8°F (16°C) and a low temperature of 44.2°F (6.8°C), is Sierra Heights's coldest month.Humidity
The average relative humidity in December in Sierra Heights is 51%.Rainfall
In Sierra Heights, in December, during 5.9 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Sierra Heights, California, during the entire year, the rain falls for 48.1 days and collects up to 6.89" (175mm) of precipitation.Snowfall
In Sierra Heights, snow does not fall in January, March through December.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of December in Sierra Heights, sunrise is at 6:38 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:50 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.9h of sunshine.UV index
December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 during December translates into the following guidance:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Minimize direct exposure to the Sun during midday when its radiation is at its peak. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What is the coldest month in Sierra Heights?
What is the usual temperature for Sierra Heights in December?
What is the average humidity in December in Sierra Heights?
How many days does it rain in December in Sierra Heights?
When it does not snow in Sierra Heights?
What is the month with the shortest days in Sierra Heights?
What is the average length of the day in December in Sierra Heights?
When are sunrise and sunset in December in Sierra Heights?
What is the month with the least sunshine in Sierra Heights?
How long on average sun shines in December in Sierra Heights?
When is the lowest UV index in Sierra Heights?
How high is the UV index in December in Sierra Heights?
Average temperature in December
Sierra Heights, CA
- Average high temperature in December: 60.8°F
The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).
- Average low temperature in December: 44.2°F
The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).
Average pressure in December
Sierra Heights, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Sierra Heights, CA
- Average wind speed in December: 5.3mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in December
Sierra Heights, CA
- Average humidity in December: 51%
The months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Sierra Heights, CA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Sierra Heights, CA
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in December
Sierra Heights, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Sierra Heights, 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, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Sierra Heights, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in December
Sierra Heights, CA
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Sierra Heights, CA
- Average cloud cover in December: 21
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in December
Sierra Heights, 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).
Sierra Heights, California, USA
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