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
In Westley, December records the lowest average temperatures, peaking at 55.4°F (13°C) and reaching a low of 41°F (5°C).Humidity
In December, the average relative humidity is 71%.Rainfall
The wettest months in Westley are March and December, with an average 0.47" (12mm) of rainfall.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in Westley.On the first day of December, sunrise is at 7:01 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:56 pm PST.
Sunshine
December has the least sunshine of the year in Westley, California, with an average of 6h of sunshine.UV index
The months with the lowest UV index in Westley, California, are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 3 during December morphs into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What time of the year is the coldest in Westley?
What are the temperatures in Westley in December?
What is the average humidity in December in Westley?
What is the wettest month in Westley?
How many days does it rain in December in Westley?
What is the month with the shortest days in Westley?
How many hours of daylight does Westley have in December?
When are sunrise and sunset in December in Westley?
What is the month with the least sunshine in Westley?
How long on average sun shines in December in Westley?
What is the month with the lowest UV index in Westley?
What is the UV index intensity in December in Westley?
Average temperature in December
Westley, CA
- Average high temperature in December: 55.4°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in December: 41°F
The months with the highest average low temperature are July and August (60.8°F).
The coldest months (with the lowest average low temperature) are January and December (41°F).
Average pressure in December
Westley, CA
- Average pressure in December: 30.12"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
Westley, CA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is June (6.7mph).
The calmest months (with the lowest average wind speed) are January and November (5.1mph).
Average humidity in December
Westley, CA
- Average humidity in December: 71%
The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (39%).
Average rainfall in December
Westley, CA
- Average rainfall in December: 0.47"
The wettest months (with the highest rainfall) are March and December (0.47").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in December
Westley, CA
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is March (8.5 days).
The month with the least rainy days is June (1 days).
Average daylight in December /
Average sunshine in December
Westley, 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 0min
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 0min).
Average sunshine days in December
Westley, CA
- Average sunshine days in December: 22.8 days
The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (20.9 days).
Average UV index in December
Westley, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Westley, CA
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Westley, 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).
Westley, California, USA
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