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
December brings a drop in Alton's average high-temperature, falling from a chilly 43.3°F (6.3°C) in November to a subzero cold 31.8°F (-0.1°C). Alton, during the nights of December, experiences an average temperature drop to a still freezing cold 21.6°F (-5.8°C).Humidity
The average relative humidity in December in Alton is 82%.Rainfall
In Alton, in December, it is raining for 10.4 days, with typically 2.91" (74mm) of accumulated precipitation. Throughout the year, there are 152 rainfall days, and 29.09" (739mm) of precipitation is accumulated.Snowfall
Months with snowfall in Alton are January through May, October through December. In December, in Alton, it is snowing for 10.6 days. Throughout December, 7.01" (178mm) of snow is accumulated. In Alton, during the entire year, snow falls for 58.3 days and aggregates up to 38.98" (990mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Alton, New Hampshire.On the first day of December, sunrise is at 6:58 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:18 pm EST.
Sunshine
In Alton, New Hampshire, the average sunshine in December is 4.6h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
How cold is it in Alton in December?
What is the average humidity in December in Alton?
How much does it rain in Alton in December?
How much does it snow in Alton in December?
What is the month with the shortest days in Alton?
How many hours of daylight does Alton have in December?
What time are sunrise and sunset in December in Alton?
How many hours of sunshine does Alton have in December?
When is the lowest UV index in Alton?
What is the UV index intensity in December in Alton?
Average temperature in December
Alton, NH
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in December: 21.6°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 (12.9°F).
Average pressure in December
Alton, 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
Alton, NH
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Alton, NH
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Alton, NH
- Average rainfall in December: 2.91"
The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
Alton, NH
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in December
Alton, NH
- Average snowfall in December: 7.01"
The month with the highest snowfall is February (9.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Alton, NH
- Average snowfall days in December: 10.6 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Alton, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Alton, NH
- Average sunshine days in December: 13.9 days
The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is April (11.4 days).
Average UV index in December
Alton, NH
- Average UV index in December: 2
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, March, October, November and December (UV index 2).
Average cloud cover in December
Alton, NH
- Average cloud cover in December: 50
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Alton, 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).
Alton, New Hampshire, USA
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