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 brings a slight decrease in temperature, down from a chilly 49.8°F (9.9°C) in November to an icy 41.7°F (5.4°C). During December, nights cool slightly to an average low of 32.9°F (0.5°C).Humidity
In Humarock, the average relative humidity in December is 76%.Rainfall
In December, the rain falls for 8.6 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. In Humarock, during the entire year, the rain falls for 120.2 days and collects up to 12.24" (311mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Humarock, during December, snow falls for 3.9 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, there are 21 snowfall days, and 3.54" (90mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:52 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:11 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
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December in Humarock?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days in Humarock?
How many hours of daylight does Humarock have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Humarock have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Humarock, MA
- Average high temperature in December: 41.7°F
The warmest months (with the highest average high temperature) are July and August (75.7°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 32.9°F
The months with the highest average low temperature are July and August (65.8°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Humarock, 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 (29.93"Hg).
Average wind speed in December
Humarock, MA
- Average wind speed in December: 12.2mph
The windiest month (with the highest average wind speed) is January (13mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in December
Humarock, MA
- Average humidity in December: 76%
The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March and November (74%).
Average rainfall in December
Humarock, MA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in December
Humarock, MA
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in December
Humarock, MA
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Humarock, MA
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (6 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
Humarock, 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: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in December
Humarock, MA
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is December (18.9 days).
The month with the least sunshine days is July (15.7 days).
Average UV index in December
Humarock, MA
- Average UV index in December: 2
The months with the highest UV index are 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
Humarock, MA
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Humarock, 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).
Humarock, Massachusetts, USA
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