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
Upper Lake witnesses the coldest weather in December, with temperatures averaging a high of 52.3°F (11.3°C) and a low of 37.2°F (2.9°C).Humidity
In Upper Lake, the average relative humidity in December is 73%.Rainfall
In December, the rain falls for 12.3 days. Throughout December, 3.7" (94mm) of precipitation is accumulated. In Upper Lake, California, during the entire year, the rain falls for 92 days and collects up to 21.02" (534mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In December, in Upper Lake, it is snowing for 0.2 days. Throughout December, 0.08" (2mm) of snow is accumulated. Throughout the year, there are 2 snowfall days, and 1.34" (34mm) of snow is accumulated.Daylight
The month with the shortest days in Upper Lake is December, with an average of 9h and 30min of daylight.On the first day of December in Upper Lake, sunrise is at 7:12 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:59 pm PST.
Sunshine
The month with the least sunshine in Upper Lake is December, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index in Upper Lake are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 3 translates into these guidelines:
Ensure safety - Imperative it is to shield skin and eyes from damage. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the coldest month in Upper Lake?
What are December temperatures in Upper Lake?
What is the average humidity in December in Upper Lake?
How many days does it rain in December in Upper Lake?
How much does it snow in Upper Lake in December?
What is the month with the shortest days in Upper Lake?
How many hours of daylight does Upper Lake have in December?
When is the sunrise / sunset in December in Upper Lake?
What is the month with the least sunshine in Upper Lake?
How many hours of sunshine does Upper Lake have in December?
What is the month with the lowest UV index in Upper Lake?
What is the UV index reading in December in Upper Lake?
Average temperature in December
Upper Lake, CA
- Average high temperature in December: 52.3°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (52.3°F).
- Average low temperature in December: 37.2°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in December
Upper Lake, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in December
Upper Lake, CA
- Average wind speed in December: 4.4mph
The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is November (4.1mph).
Average humidity in December
Upper Lake, CA
- Average humidity in December: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (47%).
Average rainfall in December
Upper Lake, CA
- Average rainfall in December: 3.7"
The wettest month (with the highest rainfall) is February (4.06").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Upper Lake, CA
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is March (15.9 days).
The months with the least rainy days are July and August (1.3 days).
Average snowfall in December
Upper Lake, CA
- Average snowfall in December: 0.08"
The months with the highest snowfall are January and February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Upper Lake, CA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Upper Lake, CA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Upper Lake, CA
- Average sunshine days in December: 17.6 days
The months with the most sunshine days are July and August (28.3 days).
The month with the least sunshine days is March (13.7 days).
Average UV index in December
Upper Lake, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Upper Lake, CA
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Upper Lake, CA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are March and December (5mi).
Upper Lake, California, USA
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