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 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
In Bostonia, December is the month with the lowest recorded average temperatures, measuring a high of 63.7°F (17.6°C) and a low of 47.8°F (8.8°C).Humidity
In December, the average relative humidity is 59%.Rainfall
In Bostonia, in December, during 5.9 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, in Bostonia, there are 56.1 rainfall days, and 8.27" (210mm) of precipitation is accumulated.Daylight
The month with the shortest days in Bostonia is December, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 6:32 am and sunset at 4:41 pm. On the last day of December, sunrise is at 6:50 am and sunset at 4:52 pm PST.
Sunshine
December has the least sunshine of the year in Bostonia, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index in Bostonia are January, February, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 4 in December leads to these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What is the coldest month in Bostonia?
What are December temperatures in Bostonia?
What is the average humidity in December in Bostonia?
How many days does it rain in December in Bostonia?
What is the month with the shortest days in Bostonia?
What is the average length of the day in December in Bostonia?
When is the sunrise / sunset in December in Bostonia?
What is the month with the least sunshine in Bostonia?
How many hours of sunshine does Bostonia have in December?
What are the months with the lowest UV index in Bostonia?
What is the UV index reading in December in Bostonia?
Average temperature in December
Bostonia, CA
- Average high temperature in December: 63.7°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in December: 47.8°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (47.8°F).
Average pressure in December
Bostonia, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in December
Bostonia, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is October (4.3mph).
Average humidity in December
Bostonia, CA
- Average humidity in December: 59%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (53%).
Average rainfall in December
Bostonia, CA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Bostonia, CA
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.4 days).
Average daylight in December /
Average sunshine in December
Bostonia, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Bostonia, CA
- Average sunshine days in December: 24.7 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.9 days).
Average UV index in December
Bostonia, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in December
Bostonia, CA
- Average cloud cover in December: 23
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in December
Bostonia, 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).
Bostonia, California, USA
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