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 63°F (17.2°C) and a low-temperature average of 49.8°F (9.9°C), is the coldest month.Humidity
In Rancho Santa Margarita, the average relative humidity in December is 60%.Rainfall
The month with the most rainfall is December, when the rain falls for 6.7 days and typically aggregates up to 1.02" (26mm) of precipitation.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December in Rancho Santa Margarita, sunrise is at 6:37 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.6h of sunshine.UV index
The months with the lowest UV index in Rancho Santa Margarita are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a regular UV index of 4 translates into these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What time of the year is the coldest in Rancho Santa Margarita?
What are the temperatures in Rancho Santa Margarita in December?
What is the average humidity in December in Rancho Santa Margarita?
What is the wettest month in Rancho Santa Margarita?
How much does it rain in Rancho Santa Margarita in December?
What is the month with the shortest days in Rancho Santa Margarita?
How many hours of daylight does Rancho Santa Margarita have in December?
When are sunrise and sunset in December in Rancho Santa Margarita?
What is the month with the least sunshine in Rancho Santa Margarita?
How long on average sun shines in December in Rancho Santa Margarita?
When is the lowest UV index in Rancho Santa Margarita?
What is the UV index intensity in December in Rancho Santa Margarita?
Average temperature in December
Rancho Santa Margarita, CA
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in December: 49.8°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in December
Rancho Santa Margarita, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in December
Rancho Santa Margarita, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Rancho Santa Margarita, CA
- Average humidity in December: 60%
The months with the highest relative humidity are May and June (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in December
Rancho Santa Margarita, CA
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is December (1.02").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Rancho Santa Margarita, CA
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is March (8.6 days).
The month with the least rainy days is June (1.9 days).
Average daylight in December /
Average sunshine in December
Rancho Santa Margarita, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Rancho Santa Margarita, CA
- Average sunshine days in December: 22.7 days
The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is February (19.8 days).
Average UV index in December
Rancho Santa Margarita, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Rancho Santa Margarita, 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 7).
Average visibility in December
Rancho Santa Margarita, 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).
Rancho Santa Margarita, California, USA
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