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 sea temperature 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 Monterey, December records the lowest average temperatures, peaking at 57.2°F (14°C) and reaching a low of 46.4°F (8°C).Humidity
In December, the average relative humidity is 71%.Rainfall
December is the month with the most rainfall in Monterey, California. Rain falls for 9.9 days and accumulates 2.4" (61mm) of precipitation.Ocean temperature
In December, the average ocean temperature is 55.6°F (13.1°C).Note: It is life-risking to swim in 55.6°F (13.1°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:01 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:19 am and sunset at 5:02 pm PST.
Sunshine
With an average of 6h of sunshine, December has the least sunshine of the year.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index in Monterey. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Monterey?
What is the temperature in December in Monterey?
What is the average humidity in December in Monterey?
What is the wettest month in Monterey?
How many days does it rain in December in Monterey?
What is the water temperature in December in Monterey?
What is the month with the shortest days in Monterey?
How many hours of daylight does Monterey have in December?
When are sunrise and sunset in December in Monterey?
What is the month with the least sunshine in Monterey?
How long on average sun shines in December in Monterey?
When is the lowest UV index in Monterey?
What is the UV index reading in December in Monterey?
Average temperature in December
Monterey, CA
- Average high temperature in December: 57.2°F
The warmest month (with the highest average high temperature) is September (72.5°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in December: 46.4°F
The months with the highest average low temperature are August and September (55.2°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in December
Monterey, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in December
Monterey, CA
- Average wind speed in December: 6.4mph
The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Monterey, CA
- Average humidity in December: 71%
The months with the highest relative humidity are March and May (76%).
The month with the lowest relative humidity is November (68%).
Average rainfall in December
Monterey, CA
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is December (2.4").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in December
Monterey, CA
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (1.1 days).
Average sea temperature in December
Monterey, CA
- Average sea temperature in December: 55.6°F
The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).
Average daylight in December /
Average sunshine in December
Monterey, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 6h
The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6h).
Average sunshine days in December
Monterey, CA
- Average sunshine days in December: 20 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.8 days).
Average UV index in December
Monterey, CA
- Average UV index in December: 3
The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Monterey, CA
- Average cloud cover in December: 32
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in December
Monterey, 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).
Monterey, California, USA
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