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
December's arrival corresponds with a decrease in average high-temperatures, from November's frosty 48.2°F (9°C) to an icy 38.1°F (3.4°C). Throughout December, the nighttime temperature averages to a subzero cold 26.6°F (-3°C).Humidity
In December, the average relative humidity is 77%.Rainfall
In Littleton, in December, it is raining for 9.6 days, with typically 2.64" (67mm) of accumulated precipitation. In Littleton, during the entire year, the rain falls for 140 days and collects up to 27.09" (688mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Littleton. In Littleton, during December, snow falls for 6 days and regularly aggregates up to 4.69" (119mm) of snow. In Littleton, during the entire year, snow falls for 34.1 days and aggregates up to 23.58" (599mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:13 pm. On the last day of December, in Littleton, sunrise is at 7:15 am and sunset at 4:23 pm EST.
Sunshine
The average sunshine in December in Littleton is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Littleton. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Littleton?
What is the average humidity in December in Littleton?
How much does it rain in Littleton in December?
How many days does it snow in December in Littleton?
What is the month with the shortest days in Littleton?
How many hours of daylight does Littleton have in December?
What time are sunrise and sunset in December in Littleton?
How many hours of sunshine does Littleton have in December?
What are the months with the lowest UV index in Littleton?
What is the UV index intensity in December in Littleton?
Average temperature in December
Littleton, MA
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Littleton, 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
Littleton, MA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Littleton, MA
- Average humidity in December: 77%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Littleton, MA
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is October (2.68").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in December
Littleton, MA
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (6.5 days).
Average snowfall in December
Littleton, MA
- Average snowfall in December: 4.69"
The month with the highest snowfall is February (6.14").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Littleton, MA
- Average snowfall days in December: 6 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Littleton, 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Littleton, MA
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (13.7 days).
Average UV index in December
Littleton, 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
Littleton, MA
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Littleton, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
Littleton, Massachusetts, USA
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