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
The onset of December coincides with a reduction in the average high-temperature, falling from a frosty 45.5°F (7.5°C) in November to a cold 34.5°F (1.4°C). In the month of December, Winchester witnesses a consistent average low-temperature of 23.9°F (-4.5°C).Humidity
In Winchester, the average relative humidity in December is 81%.Rainfall
In Winchester, New Hampshire, in December, it is raining for 9.8 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 146.7 rainfall days, and 27.2" (691mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Winchester, in December, snow falls for 7.9 days, with typically accumulated 5.35" (136mm) of snow. Throughout the year, in Winchester, there are 43.8 snowfall days, and 27.28" (693mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December in Winchester, sunrise is at 7:00 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:25 pm EST.
Sunshine
In Winchester, the average sunshine in December is 5h.UV index
The months with the lowest UV index in Winchester are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 in December translates into this advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Winchester?
What is the average humidity in December in Winchester?
How many days does it rain in December in Winchester?
How many days does it snow in December in Winchester?
What is the month with the shortest days in Winchester?
How many hours of daylight does Winchester have in December?
When is the sunrise / sunset in December in Winchester?
How many hours of sunshine does Winchester have in December?
When is the lowest UV index in Winchester?
What is the UV index reading in December in Winchester?
Average temperature in December
Winchester, NH
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 23.9°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 (16.2°F).
Average pressure in December
Winchester, NH
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Winchester, NH
- Average wind speed in December: 7.3mph
The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Winchester, NH
- Average humidity in December: 81%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Winchester, NH
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is October (2.76").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Winchester, NH
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in December
Winchester, NH
- Average snowfall in December: 5.35"
The month with the highest snowfall is February (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Winchester, NH
- Average snowfall days in December: 7.9 days
The month with the highest number of snowfall days is February (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Winchester, 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: 5h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Winchester, NH
- Average sunshine days in December: 15.8 days
The months with the most sunshine days are January and November (16.7 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in December
Winchester, NH
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Winchester, NH
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Winchester, NH
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Winchester, New Hampshire, USA
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