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
In Thornton, the average high-temperature in December decreases from a wintry 39.2°F (4°C) in November to a freezing cold 27.5°F (-2.5°C). During the nights in December, Thornton observes an average low-temperature of 18.1°F (-7.7°C).Humidity
In Thornton, the average relative humidity in December is 86%.Rainfall
In Thornton, New Hampshire, during December, the rain falls for 8.3 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Thornton, during the entire year, the rain falls for 126 days and collects up to 13.66" (347mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Thornton. In Thornton, in December, snow falls for 17.1 days, with typically accumulated 2.95" (75mm) of snow. Throughout the year, there are 91.5 snowfall days, and 21.85" (555mm) of snow is accumulated.Daylight
December has the shortest days of the year in Thornton, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:10 pm. On the last day of December, in Thornton, sunrise is at 7:20 am and sunset at 4:19 pm EST.
Sunshine
In Thornton, the average sunshine in December is 3.2h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 1 in December translates into this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Thornton in December?
What is the average humidity in December in Thornton?
How much does it rain in Thornton in December?
How much does it snow in Thornton in December?
What is the month with the shortest days in Thornton?
How many hours of daylight does Thornton have in December?
What time are sunrise and sunset in December in Thornton?
How many hours of sunshine does Thornton have in December?
What are the months with the lowest UV index in Thornton?
How high is the UV index in December in Thornton?
Average temperature in December
Thornton, NH
- Average high temperature in December: 27.5°F
The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in December
Thornton, 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
Thornton, NH
- Average wind speed in December: 6.5mph
The windiest months (with the highest average wind speed) are January and February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Thornton, NH
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in December
Thornton, NH
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is April (1.5").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in December
Thornton, NH
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is July (15.5 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in December
Thornton, NH
- Average snowfall in December: 2.95"
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
Thornton, NH
- Average snowfall days in December: 17.1 days
The month with the highest number of snowfall days is February (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Thornton, 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: 3h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in December
Thornton, NH
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is February (10.2 days).
Average UV index in December
Thornton, NH
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Thornton, NH
- Average cloud cover in December: 69
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 44).
Average visibility in December
Thornton, NH
- Average visibility in December: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Thornton, New Hampshire, USA
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