December weather forecastFairhaven, MA
December
Weather in December
The first month of the winter, December, is still a cold month in Fairhaven, Massachusetts, with an average temperature fluctuating between 42.4°F (5.8°C) and 33.3°F (0.7°C).Temperature
The commencement of December includes a gentle temperature shift, with the average high-temperature dropping a bit from a cool 50.9°F (10.5°C) in November to a wintry 42.4°F (5.8°C). December in Fairhaven sees the temperature falling to a mean low of 33.3°F (0.7°C).Humidity
In Fairhaven, the average relative humidity in December is 76%.Rainfall
In December, the rain falls for 9.5 days. Throughout December, 1.69" (43mm) of precipitation is accumulated. Throughout the year, there are 133.2 rainfall days, and 17.2" (437mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Fairhaven, in December, snow falls for 3.2 days, with typically accumulated 0.79" (20mm) of snow. In Fairhaven, during the entire year, snow falls for 21.4 days and aggregates up to 5.87" (149mm) of snow.Ocean temperature
In Fairhaven, in December, the average water temperature is 46.9°F (8.3°C).Note: Danger awaits those who swim in 46.9°F (8.3°C) without protection. Falling below 50°F (10°C) means intense cold shock and hyperventilation.
Daylight
December has the shortest days of the year in Fairhaven, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:51 am and sunset at 4:14 pm. On the last day of December, sunrise is at 7:10 am and sunset at 4:23 pm EST.
Sunshine
The average sunshine in December is 4.9h.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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. To protect against the Sun's most potent rays, avoid direct exposure around midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fairhaven, MA
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Fairhaven, MA
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Fairhaven, MA
- Average wind speed in December: 11.2mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (8mph).
Average humidity in December
Fairhaven, MA
- Average humidity in December: 76%
The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March, April and November (74%).
Average rainfall in December
Fairhaven, MA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is September (1.06").
Average rainfall days in December
Fairhaven, MA
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (13.4 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Fairhaven, MA
- Average snowfall in December: 0.79"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Fairhaven, MA
- Average snowfall days in December: 3.2 days
The month with the highest number of snowfall days is January (6.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Fairhaven, 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
Fairhaven, MA
- Average daylight in December: 9h and 12min
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 54min
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 48min).
Average sunshine days in December
Fairhaven, MA
- Average sunshine days in December: 18.3 days
The months with the most sunshine days are November and December (18.3 days).
The month with the least sunshine days is April (14.4 days).
Average UV index in December
Fairhaven, MA
- Average UV index in December: 2
The months with the highest UV index are June, 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
Fairhaven, MA
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Fairhaven, 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).
