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
With December's arrival, Mount Washington's weather changes as the average high-temperature falls from a wintry 37.8°F (3.2°C) in November to a subzero cold 26.8°F (-2.9°C). December in Mount Washington generally records an average low-temperature of 16.7°F (-8.5°C).Humidity
In December, the average relative humidity in Mount Washington is 85%.Rainfall
In December, in Mount Washington, the rain falls for 9.5 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. Throughout the year, there are 144.9 rainfall days, and 20.08" (510mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mount Washington are January through May, October through December. In Mount Washington, in December, snow falls for 20.3 days, with typically accumulated 8.94" (227mm) of snow. In Mount Washington, during the entire year, snow falls for 116.2 days and aggregates up to 68.07" (1729mm) of snow.Daylight
December has the shortest days of the year in Mount Washington, with an average of 8h and 54min of daylight.On the first day of December in Mount Washington, sunrise is at 7:01 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:16 pm EST.
Sunshine
In December, the average sunshine in Mount Washington is 3.9h.UV index
The months with the lowest UV index in Mount Washington are February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 1 translates into these guidelines:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
How cold is December in Mount Washington?
What is the average humidity in December in Mount Washington?
How much does it rain in Mount Washington in December?
How many days does it snow in December in Mount Washington?
What is the month with the shortest days in Mount Washington?
What is the average length of the day in December in Mount Washington?
What time are sunrise and sunset in December in Mount Washington?
How long on average sun shines in December in Mount Washington?
When is the lowest UV index in Mount Washington?
What is the UV index reading in December in Mount Washington?
Average temperature in December
Mount Washington, NH
- Average high temperature in December: 26.8°F
The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (21.7°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is July (54.7°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in December
Mount Washington, 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
Mount Washington, NH
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Mount Washington, NH
- Average humidity in December: 85%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (77%).
Average rainfall in December
Mount Washington, NH
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is April (2.44").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in December
Mount Washington, NH
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is November (8 days).
Average snowfall in December
Mount Washington, NH
- Average snowfall in December: 8.94"
The month with the highest snowfall is January (11.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Washington, NH
- Average snowfall days in December: 20.3 days
The month with the highest number of snowfall days is January (20.4 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Washington, NH
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in December
Mount Washington, NH
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is September (16.2 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Mount Washington, NH
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Mount Washington, NH
- Average cloud cover in December: 62
The month with the most cloud cover is February (Cloud cover 64).
The months with the least cloud cover are July, August and September (Cloud cover 41).
Average visibility in December
Mount Washington, NH
- Average visibility in December: 4mi
The months with the highest visibility are May, June and July (5mi).
The months with the lowest visibility are January, February, March, April, August, September, October, November and December (4mi).
Mount Washington, New Hampshire, USA
Weather forecast for your location
2. Allow the app to use your location
