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
In December, the meteorological conditions alter, with the average high-temperature shifting from a chilly 45.1°F (7.3°C) in November to a wintry 34.2°F (1.2°C). During December, Winchendon records a consistent average nighttime temperature of 23.7°F (-4.6°C).Humidity
In Winchendon, the average relative humidity in December is 82%.Rainfall
In Winchendon, during December, the rain falls for 8.8 days and regularly aggregates up to 2.56" (65mm) of precipitation. Throughout the year, there are 143.2 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 8.6 days. Throughout December, 5.31" (135mm) of snow is accumulated. Throughout the year, there are 47.7 snowfall days, and 31.93" (811mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Winchendon.On the first day of the month, sunrise is at 6:59 am and sunset at 4:15 pm. On the last day of December, in Winchendon, Massachusetts, sunrise is at 7:18 am and sunset at 4:24 pm EST.
Sunshine
In December, the average sunshine is 4.4h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 1 in December translates into these instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in Winchendon in December?
What is the average humidity in December in Winchendon?
How many days does it rain in December in Winchendon?
How much does it snow in Winchendon in December?
What is the month with the shortest days in Winchendon?
What is the average length of the day in December in Winchendon?
When are sunrise and sunset in December in Winchendon?
How long on average sun shines in December in Winchendon?
What is the month with the lowest UV index in Winchendon?
What is the UV index reading in December in Winchendon?
Average temperature in December
Winchendon, MA
- Average high temperature in December: 34.2°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 23.7°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Winchendon, 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
Winchendon, MA
- Average wind speed in December: 8mph
The windiest months (with the highest average wind speed) are January and February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Winchendon, MA
- Average humidity in December: 82%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Winchendon, MA
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Winchendon, MA
- Average rainfall days in December: 8.8 days
The months with the highest number of rainy days are May and June (15.4 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Winchendon, MA
- Average snowfall in December: 5.31"
The month with the highest snowfall is February (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Winchendon, MA
- Average snowfall days in December: 8.6 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Winchendon, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Winchendon, MA
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is April (12.7 days).
Average UV index in December
Winchendon, MA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Winchendon, MA
- Average cloud cover in December: 52
The months with the most cloud cover are February and March (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in December
Winchendon, MA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Winchendon, Massachusetts, USA
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