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's onset brings a reduction in the average high-temperature, from a chilly 44.2°F (6.8°C) in November to a cold 34.3°F (1.3°C). Throughout December, Altmar observes a steady low-temperature average of 26.4°F (-3.1°C), reflecting a minor dip from daytime highs.Humidity
The average relative humidity in December is 83%.Rainfall
In Altmar, in December, it is raining for 11 days, with typically 3.54" (90mm) of accumulated precipitation. Throughout the year, there are 171 rainfall days, and 39.21" (996mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Altmar, in December, during 14.5 snowfall days, 8.54" (217mm) of snow is typically accumulated. Throughout the year, there are 76.2 snowfall days, and 36.61" (930mm) 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 7:17 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:36 am and sunset at 4:37 pm EST.
Sunshine
In December, the average sunshine is 2.8h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Altmar have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Altmar have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Altmar, NY
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (75.2°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Altmar, NY
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Altmar, NY
- Average wind speed in December: 11.6mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
Altmar, NY
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is September (77%).
Average rainfall in December
Altmar, NY
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is October (4.02").
The driest month (with the least rainfall) is September (2.36").
Average rainfall days in December
Altmar, NY
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is October (19.1 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in December
Altmar, NY
- Average snowfall in December: 8.54"
The month with the highest snowfall is January (8.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Altmar, NY
- Average snowfall days in December: 14.5 days
The month with the highest number of snowfall days is January (18.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Altmar, NY
- 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: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Altmar, NY
- Average sunshine days in December: 8 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is January (6.3 days).
Average UV index in December
Altmar, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Altmar, NY
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 77).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Altmar, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Altmar, New York, USA
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