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
With December's arrival, Henniker, New Hampshire, sees a decrease in average high-temperatures, moving from a chilly 44.2°F (6.8°C) in November to an icy 33.1°F (0.6°C). Throughout the nights in December, an average low-temperature of 22.5°F (-5.3°C) is noted.Humidity
The average relative humidity in December is 82%.Rainfall
In Henniker, in December, it is raining for 9.3 days, with typically 2.68" (68mm) of accumulated precipitation. Throughout the year, there are 149.8 rainfall days, and 27.95" (710mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Henniker, in December, during 9.8 snowfall days, 6.89" (175mm) of snow is typically accumulated. Throughout the year, there are 54.7 snowfall days, and 34.06" (865mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in Henniker, sunrise is at 7:00 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:22 pm EST.
Sunshine
The average sunshine in December is 4.6h.UV index
The months with the lowest UV index in Henniker are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Henniker?
When is the sunrise / sunset in December?
How many hours of sunshine does Henniker have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Henniker, NH
- Average high temperature in December: 33.1°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in December: 22.5°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in December
Henniker, NH
- 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
Henniker, NH
- Average wind speed in December: 7.2mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Henniker, NH
- Average humidity in December: 82%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Henniker, NH
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Henniker, NH
- Average rainfall days in December: 9.3 days
The months with the highest number of rainy days are May and June (15.8 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in December
Henniker, NH
- Average snowfall in December: 6.89"
The month with the highest snowfall is February (8.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Henniker, NH
- Average snowfall days in December: 9.8 days
The month with the highest number of snowfall days is March (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Henniker, NH
- 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Henniker, NH
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is March (11.3 days).
Average UV index in December
Henniker, NH
- 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, October, November and December (UV index 2).
Average cloud cover in December
Henniker, NH
- Average cloud cover in December: 51
The month with the most cloud cover is March (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Henniker, NH
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Henniker, New Hampshire, USA
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