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 Calistoga's coldest month, with temperatures ranging between an average high of 54.7°F (12.6°C) and a low of 39.4°F (4.1°C).Humidity
In December, the average relative humidity is 73%.Rainfall
In December, in Calistoga, the rain falls for 11.2 days. Throughout December, 3.15" (80mm) of precipitation is accumulated. Throughout the year, in Calistoga, California, there are 77 rainfall days, and 17.05" (433mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:09 am and sunset at 4:49 pm. On the last day of December, in Calistoga, California, sunrise is at 7:27 am and sunset at 4:59 pm PST.
Sunshine
The month with the least sunshine in Calistoga is December, with an average of 5.5h of sunshine.UV index
With an average maximum UV index of 2, December is the month with the lowest UV index in Calistoga. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What time of the year is the coldest in Calistoga?
What are December temperatures in Calistoga?
What is the average humidity in December in Calistoga?
How much does it rain in Calistoga in December?
When it does not snow in Calistoga?
What is the month with the shortest days in Calistoga?
What is the average length of the day in December in Calistoga?
What time are sunrise and sunset in December in Calistoga?
What is the month with the least sunshine in Calistoga?
How many hours of sunshine does Calistoga have in December?
What is the month with the lowest UV index in Calistoga?
How high is the UV index in December in Calistoga?
Average temperature in December
Calistoga, CA
- Average high temperature in December: 54.7°F
The warmest month (with the highest average high temperature) is August (87.8°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is December (39.4°F).
Average pressure in December
Calistoga, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in December
Calistoga, CA
- Average wind speed in December: 4.5mph
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 November (4.3mph).
Average humidity in December
Calistoga, CA
- Average humidity in December: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (53%).
Average rainfall in December
Calistoga, CA
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is February (3.78").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Calistoga, CA
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (0.8 days).
Average snowfall in December
Calistoga, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Calistoga, CA
- Average snowfall days in December: 0 days
The months with the highest number of snowfall days are February and March (0.1 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Calistoga, CA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 3min
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 30min).
Average sunshine days in December
Calistoga, CA
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (15.8 days).
Average UV index in December
Calistoga, CA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Calistoga, CA
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in December
Calistoga, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is March (5mi).
Calistoga, California, USA
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