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 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
The coldest temperatures occur during December, when averages reach a peak of 55°F (12.8°C) and a low of 41.7°F (5.4°C).Humidity
The average relative humidity in December is 71%.Rainfall
In December, in Discovery Bay, the rain falls for 9.3 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. Throughout the year, in Discovery Bay, there are 62 rainfall days, and 10.16" (258mm) of precipitation is accumulated.Snowfall
December is the only month when snow falls in Discovery Bay. The month with the most snowfall days in Discovery Bay is December, when snow falls for 0.1 days.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in Discovery Bay, California.On the first day of December in Discovery Bay, sunrise is at 7:04 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:57 pm PST.
Sunshine
December has the least sunshine of the year in Discovery Bay, with an average of 5.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 3 during December translates into the following directions:
Guard yourself - Avoiding sunburn is suggested. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What time of the year is the coldest in Discovery Bay?
What is the temperature in December in Discovery Bay?
What is the average humidity in December in Discovery Bay?
How much does it rain in Discovery Bay in December?
When does it snow the most in Discovery Bay?
When does it start snowing in Discovery Bay?
What is the month with the shortest days in Discovery Bay?
How many hours of daylight does Discovery Bay have in December?
What time are sunrise and sunset in December in Discovery Bay?
What is the month with the least sunshine in Discovery Bay?
How many hours of sunshine does Discovery Bay have in December?
What is the month with the lowest UV index in Discovery Bay?
What is the UV index reading in December in Discovery Bay?
Average temperature in December
Discovery Bay, CA
- Average high temperature in December: 55°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in December: 41.7°F
The month with the highest average low temperature is September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in December
Discovery Bay, CA
- Average pressure in December: 30.11"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
Discovery Bay, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).
Average humidity in December
Discovery Bay, CA
- Average humidity in December: 71%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is September (52%).
Average rainfall in December
Discovery Bay, CA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is February (2.09").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Discovery Bay, CA
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.8 days).
Average snowfall days in December
Discovery Bay, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Discovery Bay, CA
- Average daylight in December: 9h and 4min
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 36min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Discovery Bay, CA
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.7 days).
Average UV index in December
Discovery Bay, 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
Discovery Bay, CA
- Average cloud cover in December: 35
The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in December
Discovery Bay, 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).
Discovery Bay, California, USA
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