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 in Plymouth brings a small change in high-temperatures, falling from a cold 40.6°F (4.8°C) in November to a subzero cold 29.1°F (-1.6°C). Plymouth in December experiences a low-temperature average of 19.8°F (-6.8°C).Humidity
In Plymouth, the average relative humidity in December is 83%.Rainfall
In December, the rain falls for 9.8 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 136.5 rainfall days, and 13.54" (344mm) of precipitation is accumulated.Snowfall
Months with snowfall in Plymouth are January through May, October through December. In December, in Plymouth, New Hampshire, it is snowing for 13.4 days. Throughout December, 2.72" (69mm) of snow is accumulated. In Plymouth, during the entire year, snow falls for 77.2 days and aggregates up to 22.52" (572mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of December in Plymouth, sunrise is at 7:01 am and sunset at 4:10 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:19 pm EST.
Sunshine
In Plymouth, the average sunshine in December is 4.2h.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 2 during 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. Avoiding the Sun during its peak radiation time around midday is a healthy practice. To cut down UV radiation exposure by about half, sport a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Plymouth?
What is the average humidity in December in Plymouth?
How many days does it rain in December in Plymouth?
How much does it snow in Plymouth in December?
What is the month with the shortest days in Plymouth?
What is the average length of the day in December in Plymouth?
What time are sunrise and sunset in December in Plymouth?
How long on average sun shines in December in Plymouth?
What is the UV index reading in December in Plymouth?
Average temperature in December
Plymouth, NH
- Average high temperature in December: 29.1°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (23.9°F).
- Average low temperature in December: 19.8°F
The month with the highest average low temperature is July (56.5°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in December
Plymouth, 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 (29.91"Hg).
Average wind speed in December
Plymouth, NH
- Average wind speed in December: 6.5mph
The windiest months (with the highest average wind speed) are January, February and April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Plymouth, NH
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (76%).
Average rainfall in December
Plymouth, NH
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is October (1.5").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Plymouth, NH
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in December
Plymouth, NH
- Average snowfall in December: 2.72"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Plymouth, NH
- Average snowfall days in December: 13.4 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plymouth, NH
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in December
Plymouth, NH
- Average sunshine days in December: 14.1 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in December
Plymouth, NH
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Plymouth, NH
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Plymouth, NH
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
Plymouth, New Hampshire, USA
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