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
Temperature readings reach their annual highs in December, averaging 55.9°F (13.3°C) and a minimum average of 41.9°F (5.5°C).Humidity
The average relative humidity in December is 68%.Rainfall
In December, the rain falls for 8.7 days. Throughout December, 1.89" (48mm) of precipitation is accumulated. In Catheys Valley, California, during the entire year, the rain falls for 62.9 days and collects up to 11.69" (297mm) of precipitation.Daylight
The month with the shortest days in Catheys Valley is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:52 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.1h of sunshine.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 of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Catheys Valley?
What are December temperatures in Catheys Valley?
What is the average humidity in December in Catheys Valley?
How much does it rain in Catheys Valley in December?
What is the month with the shortest days in Catheys Valley?
What is the average length of the day in December in Catheys Valley?
When are sunrise and sunset in December in Catheys Valley?
What is the month with the least sunshine in Catheys Valley?
How many hours of sunshine does Catheys Valley have in December?
What is the month with the lowest UV index in Catheys Valley?
What is the UV index reading in December in Catheys Valley?
Average temperature in December
Catheys Valley, CA
- Average high temperature in December: 55.9°F
The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in December: 41.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in December
Catheys Valley, 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
Catheys Valley, CA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is June (8.3mph).
The calmest months (with the lowest average wind speed) are January and November (5.2mph).
Average humidity in December
Catheys Valley, CA
- Average humidity in December: 68%
The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is July (32%).
Average rainfall in December
Catheys Valley, CA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is March (2.44").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in December
Catheys Valley, CA
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is June (1.1 days).
Average daylight in December /
Average sunshine in December
Catheys Valley, 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 6min).
Average sunshine days in December
Catheys Valley, CA
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in December
Catheys Valley, 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
Catheys Valley, CA
- Average cloud cover in December: 31
The month with the most cloud cover is March (Cloud cover 32).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Catheys Valley, 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).
Catheys Valley, California, USA
Weather forecast for your location
2. Allow the app to use your location