December weather forecastDescanso, CA
December
Weather in December
The first month of the winter, December, is still a refreshing month in Descanso, California, with an average temperature varying between 61.3°F (16.3°C) and 44.6°F (7°C).Temperature
In Descanso, December is the month with the lowest recorded average temperatures, measuring a high of 61.3°F (16.3°C) and a low of 44.6°F (7°C).Humidity
In Descanso, the average relative humidity in December is 57%.Rainfall
In Descanso, in December, during 5.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Descanso, during the entire year, the rain falls for 62 days and collects up to 6.38" (162mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 6:31 am and sunset at 4:39 pm. On the last day of December, sunrise is at 6:48 am and sunset at 4:50 pm PST.
Sunshine
With an average of 6.7h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 3 translates into these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Descanso, CA
- Average high temperature in December: 61.3°F
The warmest month (with the highest average high temperature) is August (87.3°F).
The month with the lowest average high temperature is December (61.3°F).
- Average low temperature in December: 44.6°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (44.2°F).
Average pressure in December
Descanso, 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 (29.85"Hg).
Average wind speed in December
Descanso, CA
- Average wind speed in December: 5.1mph
The windiest month (with the highest average wind speed) is May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.1mph).
Average humidity in December
Descanso, CA
- Average humidity in December: 57%
The month with the highest relative humidity is May (62%).
The month with the lowest relative humidity is November (51%).
Average rainfall in December
Descanso, CA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is February (0.94").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Descanso, CA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (1.5 days).
Average daylight in December /
Average sunshine in December
Descanso, 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 42min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Descanso, CA
- Average sunshine days in December: 24 days
The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is July (19.4 days).
Average UV index in December
Descanso, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Descanso, 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 6).
Average visibility in December
Descanso, 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).
