December weather forecastLynnfield, MA
December
Weather in December
December, the first month of the winter in Lynnfield, is also an icy month, with an average temperature varying between 29.8°F (-1.2°C) and 39.7°F (4.3°C).Temperature
Onset of December witnesses a reduction in the average high-temperature, falling from a frosty 49.1°F (9.5°C) in November to an icy 39.7°F (4.3°C). Lynnfield witnesses a consistent average low-temperature of 29.8°F (-1.2°C) throughout December.Humidity
The average relative humidity in December is 76%.Rainfall
December is the month with the most rainfall. Rain falls for 10.5 days and accumulates 2.99" (76mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, in Lynnfield, it is snowing for 5.1 days. Throughout December, 3.27" (83mm) of snow is accumulated. In Lynnfield, during the entire year, snow falls for 29.9 days and aggregates up to 14.96" (380mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:54 am and sunset at 4:12 pm. On the last day of December, in Lynnfield, Massachusetts, sunrise is at 7:13 am and sunset at 4:21 pm EST.
Sunshine
February and December, with an average of 4.7h of sunshine, are months with the least sunshine.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 estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 during December translates into the following guidance:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lynnfield, MA
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Lynnfield, 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 (29.92"Hg).
Average wind speed in December
Lynnfield, MA
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in December
Lynnfield, MA
- Average humidity in December: 76%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Lynnfield, MA
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is December (2.99").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Lynnfield, MA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Lynnfield, MA
- Average snowfall in December: 3.27"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Lynnfield, MA
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lynnfield, MA
- Average daylight in December: 9h and 6min
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 42min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in December
Lynnfield, MA
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is January (17.7 days).
The month with the least sunshine days is April (13.3 days).
Average UV index in December
Lynnfield, 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
Lynnfield, MA
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Lynnfield, 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).
