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 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 stands out as Lake Arrowhead's coldest month, with an average high-temperature of 53.4°F (11.9°C) and a low-temperature of 38.3°F (3.5°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 52%.Rainfall
In Lake Arrowhead, in December, it is raining for 5.5 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, in Lake Arrowhead, there are 42.2 rainfall days, and 5.55" (141mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Lake Arrowhead. In Lake Arrowhead, during December, snow falls for 2.5 days and regularly aggregates up to 2.09" (53mm) of snow. Throughout the year, there are 15.6 snowfall days, and 18.35" (466mm) of snow is accumulated.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year in Lake Arrowhead.On the first day of December, sunrise is at 6:37 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:49 pm PST.
Sunshine
With an average of 6.9h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 3 in December leads to these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
What is the average December temperature?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December in Lake Arrowhead?
What is the month with the shortest days?
How many hours of daylight does Lake Arrowhead have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December in Lake Arrowhead?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Lake Arrowhead, CA
- Average high temperature in December: 53.4°F
The warmest months (with the highest average high temperature) are July and August (88.3°F).
The month with the lowest average high temperature is December (53.4°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in December
Lake Arrowhead, 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 (29.83"Hg).
Average wind speed in December
Lake Arrowhead, CA
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is September (5.3mph).
Average humidity in December
Lake Arrowhead, CA
- Average humidity in December: 52%
The months with the highest relative humidity are February and December (52%).
The month with the lowest relative humidity is August (32%).
Average rainfall in December
Lake Arrowhead, CA
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is February (1.1").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Lake Arrowhead, CA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is March (5.7 days).
The month with the least rainy days is June (1.2 days).
Average snowfall in December
Lake Arrowhead, CA
- Average snowfall in December: 2.09"
The month with the highest snowfall is April (4.09").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Lake Arrowhead, CA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Lake Arrowhead, 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 and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Lake Arrowhead, CA
- Average sunshine days in December: 23.6 days
The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in December
Lake Arrowhead, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Lake Arrowhead, CA
- Average cloud cover in December: 22
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Lake Arrowhead, 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).
Lake Arrowhead, California, USA
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