December weather forecastMorongo Valley, CA
December
Weather in December
December, the first month of the winter in Morongo Valley, is also a moderate month, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 41.4°F (5.2°C).Temperature
With its high average temperature of 55.9°F (13.3°C) and a low of 41.4°F (5.2°C), December is regarded as the coldest month.Humidity
With an average relative humidity of 47%, December is the most humid month.Rainfall
The month with the most rainfall is December, when the rain falls for 4 days and typically aggregates up to 0.47" (12mm) of precipitation.Snowfall
February and December are months with snowfall. December is the month with the most snowfall. Snow falls for 0.2 days and accumulates 0.35" (9mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:34 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:47 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 7h of sunshine.UV index
November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 3 during December translates into these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Morongo Valley, CA
- Average high temperature in December: 55.9°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in December: 41.4°F
The month with the highest average low temperature is August (70.9°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in December
Morongo Valley, 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 (29.81"Hg).
Average wind speed in December
Morongo Valley, CA
- Average wind speed in December: 6.7mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is January (6.5mph).
Average humidity in December
Morongo Valley, CA
- Average humidity in December: 47%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (26%).
Average rainfall in December
Morongo Valley, CA
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").
Average rainfall days in December
Morongo Valley, CA
- Average rainfall days in December: 4 days
The months with the highest number of rainy days are July and December (4 days).
The month with the least rainy days is June (0.8 days).
Average snowfall in December
Morongo Valley, CA
- Average snowfall in December: 0.35"
The month with the highest snowfall is December (0.35").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Morongo Valley, CA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Morongo Valley, CA
- Average daylight in December: 9h and 54min
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: 7h and 0min
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: 7h and 0min).
Average sunshine days in December
Morongo Valley, CA
- Average sunshine days in December: 25.5 days
The month with the most sunshine days is October (28.8 days).
The month with the least sunshine days is July (24.5 days).
Average UV index in December
Morongo Valley, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Morongo Valley, CA
- Average cloud cover in December: 19
The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in December
Morongo Valley, 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).
