December weather forecastDanville, CA
December
Weather in December
December, the first month of the winter in Danville, is still a mild month, with an average temperature ranging between max 55.8°F (13.2°C) and min 42.3°F (5.7°C).Temperature
Danville's coldest month, December, generally records average temperatures ranging from a high of 55.8°F (13.2°C) to a low of 42.3°F (5.7°C).Humidity
In Danville, the average relative humidity in December is 71%.Rainfall
In December, in Danville, the rain falls for 9.8 days. Throughout December, 1.73" (44mm) of precipitation is accumulated. In Danville, during the entire year, the rain falls for 65.6 days and collects up to 11.22" (285mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:59 pm PST.
Sunshine
With an average of 5.8h of sunshine, December has the least sunshine of the year.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 reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 3 transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Danville, CA
- Average high temperature in December: 55.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in December: 42.3°F
The months with the highest average low temperature are August and September (56.7°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).
Average pressure in December
Danville, 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, August and September (29.92"Hg).
Average wind speed in December
Danville, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is May (6.9mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in December
Danville, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).
Average rainfall in December
Danville, CA
- Average rainfall in December: 1.73"
The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0").
Average rainfall days in December
Danville, CA
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).
Average daylight in December /
Average sunshine in December
Danville, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 48min
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
Danville, CA
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (17.6 days).
Average UV index in December
Danville, 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
Danville, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in December
Danville, 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).
