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 start of December comes with a reduction in the average high-temperature, receding from a chilly 43.2°F (6.2°C) in November to a subzero cold 31.5°F (-0.3°C). Nighttime temperatures in December average to 21°F (-6.1°C) in Grafton.Humidity
The average relative humidity in December is 82%.Rainfall
In Grafton, in December, it is raining for 5.6 days, with typically 1.06" (27mm) of accumulated precipitation. In Grafton, during the entire year, the rain falls for 103.3 days and collects up to 12.52" (318mm) of precipitation.Snowfall
Months with snowfall in Grafton, New Hampshire, are January through May, October through December. In Grafton, during December, snow falls for 8.2 days and regularly aggregates up to 3.19" (81mm) of snow. Throughout the year, in Grafton, New Hampshire, there are 43.2 snowfall days, and 14.49" (368mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:01 am and sunset at 4:12 pm. On the last day of December, in Grafton, New Hampshire, sunrise is at 7:20 am and sunset at 4:21 pm EST.
Sunshine
In December, the average sunshine in Grafton is 4.3h.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the UV index of 1 transforms into the following advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
How cold is it in Grafton in December?
What is the average humidity in December in Grafton?
How much does it rain in Grafton in December?
How many days does it snow in December in Grafton?
What is the month with the shortest days in Grafton?
What is the average length of the day in December in Grafton?
What time are sunrise and sunset in December in Grafton?
How long on average sun shines in December in Grafton?
What is the month with the lowest UV index in Grafton?
What is the UV index intensity in December in Grafton?
Average temperature in December
Grafton, NH
- Average high temperature in December: 31.5°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in December: 21°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in December
Grafton, 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
Grafton, 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 (4.9mph).
Average humidity in December
Grafton, NH
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in December
Grafton, NH
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is October (1.54").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in December
Grafton, NH
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is July (11.6 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in December
Grafton, NH
- Average snowfall in December: 3.19"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Grafton, NH
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grafton, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Grafton, NH
- Average sunshine days in December: 19 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is February (16.1 days).
Average UV index in December
Grafton, NH
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Grafton, NH
- Average cloud cover in December: 54
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Grafton, NH
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Grafton, New Hampshire, USA
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