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 snowfall in December
- Average snowfall 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
December, characterized by an average high temperature of 47.1°F (8.4°C) and a low temperature of 30.7°F (-0.7°C), is generally the coldest month.Humidity
In December, the average relative humidity is 81%.Rainfall
In Mettah, in December, during 16 rainfall days, 6.54" (166mm) of precipitation is typically accumulated. In Mettah, during the entire year, the rain falls for 127.2 days and collects up to 39.02" (991mm) of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.5 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, there are 3.3 snowfall days, and 2.83" (72mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:22 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:56 pm PST.
Sunshine
With an average of 4.8h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What are December temperatures?
What is the average humidity in December?
How much does it rain in December?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Mettah have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Mettah have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Mettah, CA
- Average high temperature in December: 47.1°F
The warmest month (with the highest average high temperature) is August (83.3°F).
The month with the lowest average high temperature is December (47.1°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in December
Mettah, 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 August (29.96"Hg).
Average wind speed in December
Mettah, CA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Mettah, CA
- Average humidity in December: 81%
The month with the highest relative humidity is March (84%).
The month with the lowest relative humidity is August (61%).
Average rainfall in December
Mettah, CA
- Average rainfall in December: 6.54"
The wettest month (with the highest rainfall) is January (7.17").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
Mettah, CA
- Average rainfall days in December: 16 days
The month with the highest number of rainy days is March (19.3 days).
The months with the least rainy days are July and August (2.3 days).
Average snowfall in December
Mettah, CA
- Average snowfall in December: 0.39"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Mettah, CA
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mettah, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in December
Mettah, CA
- Average sunshine days in December: 14 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is March (10.3 days).
Average UV index in December
Mettah, CA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in December
Mettah, CA
- Average cloud cover in December: 50
The month with the most cloud cover is March (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in December
Mettah, CA
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are March, April and December (4mi).
Mettah, California, USA
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