December weather forecastGreenfield, NH
December
Weather in December
December, the first month of the winter in Greenfield, is still a cold month, with an average temperature ranging between min 23°F (-5°C) and max 33.6°F (0.9°C).Temperature
The shift from November to December corresponds with a decrease in the average high-temperature, down to an icy 33.6°F (0.9°C) from a chilly 44.8°F (7.1°C). During December, the nighttime temperature averages of 23°F (-5°C).Humidity
In Greenfield, New Hampshire, the average relative humidity in December is 81%.Rainfall
In December, in Greenfield, the rain falls for 7.5 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. In Greenfield, New Hampshire, during the entire year, the rain falls for 113.8 days and collects up to 12.44" (316mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Greenfield, in December, during 7.5 snowfall days, 3.03" (77mm) of snow is typically accumulated. In Greenfield, during the entire year, snow falls for 45.3 days and aggregates up to 18.78" (477mm) of snow.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 Greenfield, sunrise is at 6:59 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:23 pm EST.
Sunshine
In December, the average sunshine is 4.6h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Greenfield, NH
- Average high temperature in December: 33.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in December
Greenfield, 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
Greenfield, 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
Greenfield, 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
Greenfield, NH
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in December
Greenfield, NH
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in December
Greenfield, NH
- Average snowfall in December: 3.03"
The month with the highest snowfall is November (3.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Greenfield, NH
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greenfield, NH
- Average daylight in December: 9h and 6min
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 36min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Greenfield, NH
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in December
Greenfield, 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
Greenfield, 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 36).
Average visibility in December
Greenfield, NH
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
