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 weather is marked by a drop in the average high-temperature, falling from a frosty 49.1°F (9.5°C) in November to an icy 38.5°F (3.6°C). Lexington experiences a steady low-temperature of 28.2°F (-2.1°C) throughout December.Humidity
In December, the average relative humidity in Lexington is 77%.Rainfall
December is the month with the most rainfall. Rain falls for 9.9 days and accumulates 2.91" (74mm) of precipitation.Snowfall
Months with snowfall in Lexington, Massachusetts, are January through May, October through December. In Lexington, during December, snow falls for 5.1 days and regularly aggregates up to 4.29" (109mm) of snow. Throughout the year, there are 31.2 snowfall days, and 19.88" (505mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December in Lexington, sunrise is at 6:55 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:22 pm EST.
Sunshine
In December, the average sunshine in Lexington is 4.8h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 1 in December leads to these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold is December in Lexington?
What is the average humidity in December in Lexington?
What is the wettest month in Lexington?
How many days does it rain in December in Lexington?
How many days does it snow in December in Lexington?
What is the month with the shortest days in Lexington?
How many hours of daylight does Lexington have in December?
What time are sunrise and sunset in December in Lexington?
How many hours of sunshine does Lexington have in December?
When is the lowest UV index in Lexington?
How high is the UV index in December in Lexington?
Average temperature in December
Lexington, MA
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Lexington, MA
- Average pressure in December: 30.03"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
Lexington, MA
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Lexington, MA
- Average humidity in December: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Lexington, MA
- Average rainfall in December: 2.91"
The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in December
Lexington, MA
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Lexington, MA
- Average snowfall in December: 4.29"
The month with the highest snowfall is February (5.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lexington, MA
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lexington, 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 August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Lexington, MA
- Average sunshine days in December: 17.4 days
The months with the most sunshine days are January and November (17.5 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in December
Lexington, MA
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Lexington, MA
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Lexington, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Lexington, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location
