December weather forecastDover, NH
December
Weather in December
In December, winter makes its presence known in Dover with temperatures descending rapidly. The month witnesses 3.27" (83mm) of snowfall; a significant increase, ushering the city into the snowy season. January extends this cold and snowy weather, making the city a winter haven once again. The festive spirit blends well with the frosty weather, making December's chilly temperatures and snowfall, a charming backdrop to the city's holiday celebrations.Temperature
In Dover, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 46.6°F (8.1°C) to a wintry 37°F (2.8°C). Dover throughout December, records an average low-temperature of 27.5°F (-2.5°C).Humidity
In December, the average relative humidity is 78%.Rainfall
The wettest months are June and December, with an average 2.13" (54mm) of rainfall.Snowfall
January through April, October through December are months with snowfall. In Dover, New Hampshire, during December, snow falls for 5.4 days and regularly aggregates up to 3.27" (83mm) of snow. In Dover, New Hampshire, during the entire year, snow falls for 28.5 days and aggregates up to 14.25" (362mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 6:56 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:18 pm EST.
Sunshine
February and December, with an average of 4.9h of sunshine, are months with the least sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Dover. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dover, NH
- Average high temperature in December: 37°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 (31.6°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Dover, 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 (29.92"Hg).
Average wind speed in December
Dover, NH
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Dover, NH
- Average humidity in December: 78%
The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are April and November (75%).
Average rainfall in December
Dover, NH
- Average rainfall in December: 2.13"
The wettest months (with the highest rainfall) are June and December (2.13").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in December
Dover, NH
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is July (14.6 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in December
Dover, NH
- Average snowfall in December: 3.27"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Dover, NH
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dover, NH
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in December
Dover, NH
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in December
Dover, 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, November and December (UV index 2).
Average cloud cover in December
Dover, NH
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Dover, NH
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
