December weather forecastVernalis, CA
December
Weather in December
The first month of the winter, December, is also a fresh month in Vernalis, California, with an average temperature varying between 54.1°F (12.3°C) and 40.1°F (4.5°C).Temperature
In Vernalis, December records the lowest average temperatures, peaking at 54.1°F (12.3°C) and reaching a low of 40.1°F (4.5°C).Humidity
In December, the average relative humidity in Vernalis is 72%.Rainfall
In Vernalis, in December, it is raining for 8.1 days, with typically 0.94" (24mm) of accumulated precipitation. In Vernalis, California, during the entire year, the rain falls for 60.6 days and collects up to 5.71" (145mm) of precipitation.Snowfall
December is the only month when snow falls. December has the most snowfall days of the year. Snow falls for 0.1 days.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:46 pm. On the last day of December, in Vernalis, sunrise is at 7:20 am and sunset at 4:57 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In December, a regular UV index of 3 translates into these guidelines:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Vernalis, CA
- Average high temperature in December: 54.1°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is December (54.1°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is August (58.6°F).
The coldest months (with the lowest average low temperature) are January and December (40.1°F).
Average pressure in December
Vernalis, CA
- Average pressure in December: 30.11"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
Vernalis, CA
- Average wind speed in December: 5.1mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in December
Vernalis, CA
- Average humidity in December: 72%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is July (45%).
Average rainfall in December
Vernalis, CA
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is March (1.06").
The driest months (with the least rainfall) are June and August (0.08").
Average rainfall days in December
Vernalis, CA
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is March (10.6 days).
The month with the least rainy days is August (1.2 days).
Average snowfall days in December
Vernalis, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Vernalis, CA
- Average daylight in December: 9h and 36min
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: 5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Vernalis, CA
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is August (28.6 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in December
Vernalis, CA
- Average UV index in December: 3
The month with the highest UV index is 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
Vernalis, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Vernalis, 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).
