December weather forecastBartlett, NH
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Bartlett, New Hampshire, with an average temperature fluctuating between 18.7°F (-7.4°C) and 29.3°F (-1.5°C).Temperature
The commencement of December indicates a shift in the average high-temperature, receding from November's wintry 40.5°F (4.7°C) to a subzero cold 29.3°F (-1.5°C). Nighttime temperatures hover around an average low of 18.7°F (-7.4°C) in December.Humidity
In Bartlett, the average relative humidity in December is 83%.Rainfall
In Bartlett, in December, during 12.8 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. Throughout the year, there are 177.3 rainfall days, and 35.35" (898mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Bartlett, in December, during 15.5 snowfall days, 9.84" (250mm) of snow is typically accumulated. In Bartlett, New Hampshire, during the entire year, snow falls for 83 days and aggregates up to 60.39" (1534mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:00 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:16 pm EST.
Sunshine
In December, the average sunshine is 4.2h.UV index
In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bartlett, NH
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 18.7°F
The month with the highest average low temperature is July (54.9°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Bartlett, NH
- 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 (29.91"Hg).
Average wind speed in December
Bartlett, NH
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Bartlett, NH
- Average humidity in December: 83%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is May (77%).
Average rainfall in December
Bartlett, NH
- Average rainfall in December: 3.43"
The wettest month (with the highest rainfall) is October (3.9").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Bartlett, NH
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (10.9 days).
Average snowfall in December
Bartlett, NH
- Average snowfall in December: 9.84"
The month with the highest snowfall is February (16.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Bartlett, NH
- Average snowfall days in December: 15.5 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bartlett, NH
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 4h and 12min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Bartlett, NH
- Average sunshine days in December: 9.8 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Bartlett, NH
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Bartlett, NH
- Average cloud cover in December: 57
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in December
Bartlett, NH
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August and November (5mi).
The months with the lowest visibility are January, February, March, April, September, October and December (4mi).
