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
In Blackstone, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 49.1°F (9.5°C) to a cold 39.6°F (4.2°C). Nighttime temperature experiences an average drop to a subzero cold 28.2°F (-2.1°C) in December.Humidity
In Blackstone, the average relative humidity in December is 77%.Rainfall
In Blackstone, in December, during 10.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. In Blackstone, during the entire year, the rain falls for 144.7 days and collects up to 28.15" (715mm) of precipitation.Snowfall
Months with snowfall in Blackstone are January through May, October through December. In Blackstone, during December, snow falls for 4.8 days and regularly aggregates up to 3.39" (86mm) of snow. In Blackstone, during the entire year, snow falls for 28.8 days and aggregates up to 14.65" (372mm) of snow.Daylight
December has the shortest days of the year in Blackstone, Massachusetts, with an average of 9h and 12min of daylight.On the first day of December in Blackstone, sunrise is at 6:55 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:24 pm EST.
Sunshine
In Blackstone, the average sunshine in December is 4.7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Blackstone. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the UV index of 2 transforms into the following advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To protect against the Sun's most potent rays, avoid direct exposure around midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold does it get in Blackstone in December?
What is the average humidity in December in Blackstone?
How many days does it rain in December in Blackstone?
How many days does it snow in December in Blackstone?
What is the month with the shortest days in Blackstone?
How many hours of daylight does Blackstone have in December?
When are sunrise and sunset in December in Blackstone?
How many hours of sunshine does Blackstone have in December?
What are the months with the lowest UV index in Blackstone?
What is the UV index intensity in December in Blackstone?
Average temperature in December
Blackstone, MA
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Blackstone, 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 (29.93"Hg).
Average wind speed in December
Blackstone, MA
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is March (9.2mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Blackstone, MA
- Average humidity in December: 77%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Blackstone, MA
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in December
Blackstone, MA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is June (15.3 days).
The months with the least rainy days are January and February (7.9 days).
Average snowfall in December
Blackstone, MA
- Average snowfall in December: 3.39"
The month with the highest snowfall is March (3.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Blackstone, MA
- Average snowfall days in December: 4.8 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Blackstone, 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 12min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Blackstone, MA
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (12.5 days).
Average UV index in December
Blackstone, 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
Blackstone, MA
- Average cloud cover in December: 49
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Blackstone, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
Blackstone, Massachusetts, USA
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