December weather forecastRancho Peñasquitos, CA
December
Weather in December
December, the first month of the winter in Rancho Peñasquitos, is also an enjoyable month, with an average temperature ranging between max 63.9°F (17.7°C) and min 49.6°F (9.8°C).Temperature
December, recording an average high temperature of 63.9°F (17.7°C) and a low temperature of 49.6°F (9.8°C), is Rancho Peñasquitos's coldest month.Humidity
In Rancho Peñasquitos, the average relative humidity in December is 60%.Rainfall
The month with the most rainfall in Rancho Peñasquitos is December, when the rain falls for 4.9 days and typically aggregates up to 0.63" (16mm) 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 the month, sunrise is at 6:33 am and sunset at 4:41 pm. On the last day of December, sunrise is at 6:51 am and sunset at 4:52 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 6.8h of sunshine.UV index
The months with the lowest UV index 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 the ordinary person.Note: The maximum UV index of 4 during December translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rancho Peñasquitos, CA
- Average high temperature in December: 63.9°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 (63.9°F).
- Average low temperature in December: 49.6°F
The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in December
Rancho Peñasquitos, 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 (29.87"Hg).
Average wind speed in December
Rancho Peñasquitos, CA
- Average wind speed in December: 5.2mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.5mph).
Average humidity in December
Rancho Peñasquitos, CA
- Average humidity in December: 60%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in December
Rancho Peñasquitos, CA
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is December (0.63").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Rancho Peñasquitos, CA
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.3 days).
Average daylight in December /
Average sunshine in December
Rancho Peñasquitos, 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 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 6h and 48min).
Average sunshine days in December
Rancho Peñasquitos, CA
- Average sunshine days in December: 24.5 days
The month with the most sunshine days is October (26.1 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in December
Rancho Peñasquitos, 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 Peñasquitos, CA
- Average cloud cover in December: 23
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in December
Rancho Peñasquitos, 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).
