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
With average high temperatures of 56.8°F (13.8°C) and lows of 40.8°F (4.9°C), December is the coldest month.Humidity
The average relative humidity in December in Greenfield is 68%.Rainfall
The month with the most rainfall is December, when the rain falls for 9.2 days and typically aggregates up to 1.89" (48mm) of precipitation.Daylight
December has the shortest days of the year in Greenfield, California, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 6:58 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:00 pm PST.
Sunshine
With an average of 6.1h of sunshine, December has the least sunshine of the year in Greenfield, California.UV index
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Greenfield, California. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Frequently asked questions
What is the coldest time of year in Greenfield?
What are December temperatures in Greenfield?
What is the average humidity in December in Greenfield?
What is the wettest month in Greenfield?
How many days does it rain in December in Greenfield?
What is the month with the shortest days in Greenfield?
How many hours of daylight does Greenfield have in December?
What time are sunrise and sunset in December in Greenfield?
What is the month with the least sunshine in Greenfield?
How many hours of sunshine does Greenfield have in December?
When is the lowest UV index in Greenfield?
What is the UV index reading in December in Greenfield?
Average temperature in December
Greenfield, CA
- Average high temperature in December: 56.8°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (56.8°F).
- Average low temperature in December: 40.8°F
The month with the highest average low temperature is August (58.6°F).
The coldest month (with the lowest average low temperature) is December (40.8°F).
Average pressure in December
Greenfield, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Greenfield, CA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in December
Greenfield, CA
- Average humidity in December: 68%
The month with the highest relative humidity is February (70%).
The month with the lowest relative humidity is July (46%).
Average rainfall in December
Greenfield, CA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is December (1.89").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in December
Greenfield, CA
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is March (11.8 days).
The month with the least rainy days is August (0.4 days).
Average daylight in December /
Average sunshine in December
Greenfield, CA
- Average daylight in December: 9h and 4min
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 1min
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 6min).
Average sunshine days in December
Greenfield, CA
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is August (30.1 days).
The month with the least sunshine days is March (18.3 days).
Average UV index in December
Greenfield, 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 February, November and December (UV index 3).
Average cloud cover in December
Greenfield, CA
- Average cloud cover in December: 32
The months with the most cloud cover are March and December (Cloud cover 32).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in December
Greenfield, 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).
Greenfield, California, USA
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