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
Stepping into December, Needham observes a temperature decline, with the average high falling from November's chilly 49.3°F (9.6°C) to an icy 39.2°F (4°C). Needham sees an average low-temperature of 28.8°F (-1.8°C) during December.Humidity
In Needham, the average relative humidity in December is 76%.Rainfall
In Needham, during December, the rain falls for 6.1 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 85.9 rainfall days, and 5.87" (149mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Needham. December is the month with the most snowfall. Snow falls for 2.6 days and accumulates 0.91" (23mm) 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 December, sunrise is at 6:54 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:22 pm EST.
Sunshine
In Needham, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Needham are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Enhance your sun protection with tightly woven, yet airy clothing. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
How cold is it in Needham in December?
What is the average humidity in December in Needham?
How many days does it rain in December in Needham?
When does it snow the most in Needham?
How many days does it snow in December in Needham?
What is the month with the shortest days in Needham?
What is the average length of the day in December in Needham?
What time are sunrise and sunset in December in Needham?
How long on average sun shines in December in Needham?
When is the lowest UV index in Needham?
How high is the UV index in December in Needham?
Average temperature in December
Needham, MA
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Needham, 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
Needham, MA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Needham, MA
- Average humidity in December: 76%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Needham, MA
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in December
Needham, MA
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in December
Needham, MA
- Average snowfall in December: 0.91"
The month with the highest snowfall is December (0.91").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Needham, MA
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Needham, 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 42min).
Average sunshine days in December
Needham, MA
- Average sunshine days in December: 22.2 days
The months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).
Average UV index in December
Needham, 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
Needham, MA
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Needham, 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).
Needham, Massachusetts, USA
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