December weather forecastCrafton, CA
December
Weather in December
December, the first month of the winter in Crafton, is still a mild month, with an average temperature ranging between min 41.4°F (5.2°C) and max 58.8°F (14.9°C).Temperature
In Crafton, the lowest temperatures are generally noted in December, averaging a high of 58.8°F (14.9°C) and a low of 41.4°F (5.2°C).Humidity
The average relative humidity in December is 51%.Rainfall
December is the month with the most rainfall in Crafton. Rain falls for 6.4 days and accumulates 1.42" (36mm) of precipitation.Snowfall
In Crafton, snow does not fall in January, March through December.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:36 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:49 pm PST.
Sunshine
With an average of 6.8h of sunshine, December has the least sunshine of the year in Crafton.UV index
December is the month with the lowest UV index in Crafton, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 3 during December translates into these guidelines:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Crafton, CA
- Average high temperature in December: 58.8°F
The warmest months (with the highest average high temperature) are July and August (90.3°F).
The month with the lowest average high temperature is December (58.8°F).
- Average low temperature in December: 41.4°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in December
Crafton, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Crafton, CA
- Average wind speed in December: 5.4mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in December
Crafton, CA
- Average humidity in December: 51%
The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (37%).
Average rainfall in December
Crafton, CA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Crafton, CA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.3 days).
Average snowfall days in December
Crafton, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Crafton, CA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Crafton, CA
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is February (21.3 days).
Average UV index in December
Crafton, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Crafton, CA
- Average cloud cover in December: 22
The months with the most cloud cover are February, March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Crafton, 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).
