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 shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 44.6°F (7°C) to an icy 33.8°F (1°C). During December nights, Jaffrey witnesses a consistent average temperature of 23°F (-5°C).Humidity
In Jaffrey, the average relative humidity in December is 82%.Rainfall
In Jaffrey, during December, the rain falls for 9.7 days and regularly aggregates up to 3.07" (78mm) of precipitation. In Jaffrey, during the entire year, the rain falls for 149.5 days and collects up to 32.13" (816mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 9.8 days. Throughout December, 6.5" (165mm) of snow is accumulated. In Jaffrey, during the entire year, snow falls for 54.2 days and aggregates up to 38.27" (972mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Jaffrey.On the first day of the month, sunrise is at 6:59 am and sunset at 4:15 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:24 pm EST.
Sunshine
The average sunshine in December in Jaffrey is 4.3h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Jaffrey in December?
What is the average humidity in December in Jaffrey?
How much does it rain in Jaffrey in December?
How many days does it snow in December in Jaffrey?
What is the month with the shortest days in Jaffrey?
How many hours of daylight does Jaffrey have in December?
What time are sunrise and sunset in December in Jaffrey?
How many hours of sunshine does Jaffrey have in December?
When is the lowest UV index in Jaffrey?
What is the UV index intensity in December in Jaffrey?
Average temperature in December
Jaffrey, NH
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Jaffrey, 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
Jaffrey, NH
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Jaffrey, 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
Jaffrey, NH
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is October (3.35").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in December
Jaffrey, NH
- Average rainfall days in December: 9.7 days
The months with the highest number of rainy days are May, June and August (15.8 days).
The month with the least rainy days is February (7.2 days).
Average snowfall in December
Jaffrey, NH
- Average snowfall in December: 6.5"
The month with the highest snowfall is February (9.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Jaffrey, NH
- Average snowfall days in December: 9.8 days
The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jaffrey, 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 2min
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 6min).
Average sunshine days in December
Jaffrey, NH
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is March (11.7 days).
Average UV index in December
Jaffrey, NH
- Average UV index in December: 2
The month with the highest UV index is July (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
Jaffrey, NH
- Average cloud cover in December: 53
The months with the most cloud cover are February and March (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in December
Jaffrey, NH
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Jaffrey, New Hampshire, USA
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