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
Princeton's progression into December involves a drop in the average high-temperature, receding from a frosty 46.2°F (7.9°C) in November to an icy 35.8°F (2.1°C). Princeton records an average nighttime low of 24.8°F (-4°C) in December.Humidity
The average relative humidity in December in Princeton, Massachusetts, is 80%.Rainfall
In Princeton, in December, it is raining for 7.4 days, with typically 0.98" (25mm) of accumulated precipitation. In Princeton, during the entire year, the rain falls for 119.4 days and collects up to 12.44" (316mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Princeton, Massachusetts. In Princeton, in December, snow falls for 6.7 days, with typically accumulated 1.65" (42mm) of snow. Throughout the year, in Princeton, there are 41.1 snowfall days, and 13.27" (337mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:24 pm EST.
Sunshine
The average sunshine in December is 4.5h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 2 in December translates into this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is December in Princeton?
What is the average humidity in December in Princeton?
How much does it rain in Princeton in December?
How many days does it snow in December in Princeton?
What is the month with the shortest days in Princeton?
What is the average length of the day in December in Princeton?
When are sunrise and sunset in December in Princeton?
How long on average sun shines in December in Princeton?
What are the months with the lowest UV index in Princeton?
What is the UV index intensity in December in Princeton?
Average temperature in December
Princeton, MA
- Average high temperature in December: 35.8°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in December
Princeton, MA
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Princeton, MA
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Princeton, MA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Princeton, MA
- Average rainfall in December: 0.98"
The wettest months (with the highest rainfall) are June and July (1.3").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in December
Princeton, MA
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
Princeton, MA
- Average snowfall in December: 1.65"
The month with the highest snowfall is March (2.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Princeton, MA
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Princeton, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Princeton, MA
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is April (14.3 days).
Average UV index in December
Princeton, MA
- 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 January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Princeton, MA
- Average cloud cover in December: 51
The month with the most cloud cover is March (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Princeton, MA
- Average visibility in December: 6mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Princeton, Massachusetts, USA
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