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
In Falmouth, the beginning of December is marked by a marginally lowered average high-temperature, shifting from November's fresh 50.9°F (10.5°C) to a frosty 43.7°F (6.5°C). Falmouth's nighttime temperature in December consistently rests at a cold 35.8°F (2.1°C).Humidity
In December, the average relative humidity is 75%.Rainfall
In Falmouth, Massachusetts, in December, it is raining for 5.2 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 69.4 rainfall days, and 5.31" (135mm) of precipitation is accumulated.Snowfall
Months with snowfall in Falmouth are January through March and December. The month with the most snowfall is December, when snow falls for 2.5 days and typically aggregates up to 0.24" (6mm) of snow.Ocean temperature
In December, the average ocean temperature is 46.9°F (8.3°C).Note: Swimming at temperatures less than 50°F (10°C) in 46.9°F (8.3°C) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 55.4°F (13°C) without adequate warmth can be discomforting.
Daylight
The month with the shortest days in Falmouth is December, with an average of 9h and 12min of daylight.On the first day of December in Falmouth, sunrise is at 6:50 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:22 pm EST.
Sunshine
February and December, with an average of 4.7h of sunshine, are months with the least sunshine in Falmouth.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests these recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Enhance your sun protection with tightly woven, yet airy clothing. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is December in Falmouth?
What is the average humidity in December in Falmouth?
How much does it rain in Falmouth in December?
What is the snowiest month in Falmouth?
When does it start to snow in Falmouth?
How cold is the water in December in Falmouth?
What is the month with the shortest days in Falmouth?
How many hours of daylight does Falmouth have in December?
What time are sunrise and sunset in December in Falmouth?
What are the months with the least sunshine in Falmouth?
How many hours of sunshine does Falmouth have in December?
What are the months with the lowest UV index in Falmouth?
How high is the UV index in December in Falmouth?
Average temperature in December
Falmouth, MA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 35.8°F
The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in December
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
Falmouth, MA
- Average wind speed in December: 15mph
The windiest month (with the highest average wind speed) is January (15.3mph).
The calmest months (with the lowest average wind speed) are July and August (10.2mph).
Average humidity in December
Falmouth, MA
- Average humidity in December: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
Falmouth, MA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is October (0.71").
The driest months (with the least rainfall) are July, August and September (0.31").
Average rainfall days in December
Falmouth, MA
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is July (7.7 days).
The month with the least rainy days is September (4.6 days).
Average snowfall in December
Falmouth, MA
- Average snowfall in December: 0.24"
The month with the highest snowfall is December (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Falmouth, MA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
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
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 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in December
Falmouth, MA
- Average sunshine days in December: 23.2 days
The month with the most sunshine days is September (23.9 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in December
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
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
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).
Falmouth, Massachusetts, USA
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