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 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
A subtle change in temperatures is noted as November gives way to December, with average highs reducing from a cool 50.9°F (10.5°C) to a chilly 43.5°F (6.4°C). West Falmouth observes a consistent average low-temperature of 35.4°F (1.9°C) throughout December nights.Humidity
In West Falmouth, the average relative humidity in December is 75%.Rainfall
December is the month with the most rainfall. Rain falls for 12.8 days and accumulates 3.7" (94mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In West Falmouth, in December, snow falls for 3.3 days, with typically accumulated 0.91" (23mm) of snow. In West Falmouth, during the entire year, snow falls for 20.8 days and aggregates up to 6.93" (176mm) of snow.Ocean temperature
In December, the average ocean temperature is 46.9°F (8.3°C).Note: In 46.9°F (8.3°C), cold shock and rapid breathing can occur when swimming at temperatures below 50°F (10°C).
Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:50 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:22 pm EST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
How much does it snow in December?
How cold is the water in December in West Falmouth?
What is the month with the shortest days?
How many hours of daylight does West Falmouth have in December?
When are sunrise and sunset in December?
How many hours of sunshine does West Falmouth have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
West Falmouth, MA
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is August (74.5°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in December
West Falmouth, MA
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
West Falmouth, MA
- Average wind speed in December: 14.5mph
The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (9.9mph).
Average humidity in December
West Falmouth, MA
- Average humidity in December: 75%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
West Falmouth, MA
- Average rainfall in December: 3.7"
The wettest month (with the highest rainfall) is December (3.7").
The driest months (with the least rainfall) are August and September (1.85").
Average rainfall days in December
West Falmouth, MA
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is April (16.2 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
West Falmouth, MA
- Average snowfall in December: 0.91"
The month with the highest snowfall is March (2.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
West Falmouth, MA
- Average snowfall days in December: 3.3 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
West Falmouth, MA
- Average sea temperature in December: 46.9°F
The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).
Average daylight in December /
Average sunshine in December
West Falmouth, MA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
West Falmouth, MA
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is August (16.4 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in December
West Falmouth, MA
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
West Falmouth, MA
- Average cloud cover in December: 49
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
West Falmouth, MA
- 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).
West Falmouth, Massachusetts, USA
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