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
As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a frosty 46°F (7.8°C) to a cold 35.4°F (1.9°C). During the month of December, the temperature in South Deerfield falls to an average of 24.3°F (-4.3°C).Humidity
In December, the average relative humidity is 81%.Rainfall
The month with the most rainfall in South Deerfield is December, when the rain falls for 10.9 days and typically aggregates up to 3.07" (78mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In South Deerfield, in December, during 6.4 snowfall days, 4.33" (110mm) of snow is typically accumulated. Throughout the year, in South Deerfield, there are 38.7 snowfall days, and 23.07" (586mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:18 pm. On the last day of December, in South Deerfield, sunrise is at 7:19 am and sunset at 4:27 pm EST.
Sunshine
The average sunshine in December is 4.9h.UV index
The months with the lowest UV index in South Deerfield are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in South Deerfield in December?
What is the average humidity in December in South Deerfield?
What is the rainiest month in South Deerfield?
How many days does it rain in December in South Deerfield?
How many days does it snow in December in South Deerfield?
What is the month with the shortest days in South Deerfield?
How many hours of daylight does South Deerfield have in December?
When is the sunrise / sunset in December in South Deerfield?
How many hours of sunshine does South Deerfield have in December?
What is the month with the lowest UV index in South Deerfield?
How high is the UV index in December in South Deerfield?
Average temperature in December
South Deerfield, MA
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 24.3°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 (17.1°F).
Average pressure in December
South Deerfield, MA
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
South Deerfield, MA
- Average wind speed in December: 7.7mph
The windiest months (with the highest average wind speed) are January, February and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
South Deerfield, MA
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
South Deerfield, MA
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is December (3.07").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in December
South Deerfield, MA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is April (15.3 days).
The month with the least rainy days is February (8.9 days).
Average snowfall in December
South Deerfield, MA
- Average snowfall in December: 4.33"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
South Deerfield, MA
- Average snowfall days in December: 6.4 days
The month with the highest number of snowfall days is January (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Deerfield, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
South Deerfield, MA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in December
South Deerfield, MA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
South Deerfield, MA
- Average cloud cover in December: 48
The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
South Deerfield, 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).
South Deerfield, Massachusetts, USA
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