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 its high average temperature of 56.1°F (13.4°C) and a low of 41.9°F (5.5°C), December is regarded as the coldest month.Humidity
The average relative humidity in December in Atwater, California, is 69%.Rainfall
The wettest months in Atwater are March and December, with an average 0.55" (14mm) of rainfall.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 6:58 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:55 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.2h of sunshine.UV index
The months with the lowest UV index in Atwater are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 3 during December translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What is the coldest month in Atwater?
What are December temperatures in Atwater?
What is the average humidity in December in Atwater?
What is the wettest month in Atwater?
How much does it rain in Atwater in December?
What is the month with the shortest days in Atwater?
How many hours of daylight does Atwater have in December?
What time are sunrise and sunset in December in Atwater?
What is the month with the least sunshine in Atwater?
How many hours of sunshine does Atwater have in December?
What is the month with the lowest UV index in Atwater?
How high is the UV index in December in Atwater?
Average temperature in December
Atwater, CA
- Average high temperature in December: 56.1°F
The warmest month (with the highest average high temperature) is July (98.6°F).
The month with the lowest average high temperature is December (56.1°F).
- Average low temperature in December: 41.9°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in December
Atwater, CA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Atwater, CA
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in December
Atwater, CA
- Average humidity in December: 69%
The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is July (34%).
Average rainfall in December
Atwater, CA
- Average rainfall in December: 0.55"
The wettest months (with the highest rainfall) are March and December (0.55").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in December
Atwater, CA
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (0.5 days).
Average daylight in December /
Average sunshine in December
Atwater, CA
- Average daylight in December: 9h and 4min
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: 6h and 1min
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 12min).
Average sunshine days in December
Atwater, CA
- Average sunshine days in December: 24.9 days
The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is February (23 days).
Average UV index in December
Atwater, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Atwater, CA
- Average cloud cover in December: 31
The month with the most cloud cover is December (Cloud cover 31).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Atwater, 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).
Atwater, California, USA
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