December weather forecastTranquillity, CA
December
Weather in December
December, the first month of the winter in Tranquillity, is also a moderate month, with temperature in the range of an average low of 42.3°F (5.7°C) and an average high of 55.9°F (13.3°C).Temperature
Tranquillity's December weather, with an average high temperature of 55.9°F (13.3°C) and an average low temperature of 42.3°F (5.7°C), tends to be the coldest of the year.Humidity
The average relative humidity in December is 66%.Rainfall
In Tranquillity, in December, during 8.5 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Tranquillity, during the entire year, the rain falls for 59.3 days and collects up to 8.86" (225mm) of precipitation.Daylight
The month with the shortest days in Tranquillity is December, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 6:55 am and sunset at 4:45 pm. On the last day of December, in Tranquillity, California, sunrise is at 7:13 am and sunset at 4:55 pm PST.
Sunshine
February and December, with an average of 6.4h of sunshine, are months with the least sunshine in Tranquillity.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 medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 3 translates into these guidelines:
Take precautions - Protection against sun damage is advised. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Tranquillity, CA
- Average high temperature in December: 55.9°F
The warmest month (with the highest average high temperature) is July (99.9°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in December: 42.3°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is December (42.3°F).
Average pressure in December
Tranquillity, CA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Tranquillity, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in December
Tranquillity, CA
- Average humidity in December: 66%
The month with the highest relative humidity is January (67%).
The month with the lowest relative humidity is July (31%).
Average rainfall in December
Tranquillity, CA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is August (0").
Average rainfall days in December
Tranquillity, CA
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is March (11.4 days).
The month with the least rainy days is August (0.6 days).
Average daylight in December /
Average sunshine in December
Tranquillity, CA
- Average daylight in December: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 6h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are February and December (Average sunshine: 6h and 24min).
Average sunshine days in December
Tranquillity, CA
- Average sunshine days in December: 21.4 days
The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (18.7 days).
Average UV index in December
Tranquillity, 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 January, February, November and December (UV index 3).
Average cloud cover in December
Tranquillity, CA
- Average cloud cover in December: 29
The months with the most cloud cover are March and December (Cloud cover 29).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in December
Tranquillity, 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).
