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
Onset of December comes with a temperature decline, the average high falling from a frosty 44.8°F (7.1°C) in November to an icy 33.8°F (1°C). Nighttime, during December, brings an average low of 25.3°F (-3.7°C), a modest reduction from the day's peak.Humidity
In Mattydale, the average relative humidity in December is 85%.Rainfall
In Mattydale, in December, it is raining for 11.7 days, with typically 2.09" (53mm) of accumulated precipitation. In Mattydale, New York, during the entire year, the rain falls for 172.5 days and collects up to 26.97" (685mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Mattydale, in December, snow falls for 16.3 days, with typically accumulated 5.75" (146mm) of snow. Throughout the year, in Mattydale, there are 80.2 snowfall days, and 27.28" (693mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:17 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:39 pm EST.
Sunshine
The average sunshine in December is 3h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 1 during December translates into the following guidance:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December in Mattydale?
What is the month with the shortest days?
How many hours of daylight does Mattydale have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December in Mattydale?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Mattydale, NY
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 25.3°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Mattydale, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Mattydale, NY
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Mattydale, NY
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is April (78%).
Average rainfall in December
Mattydale, NY
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Mattydale, NY
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is August (17.6 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Mattydale, NY
- Average snowfall in December: 5.75"
The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mattydale, NY
- Average snowfall days in December: 16.3 days
The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mattydale, NY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Mattydale, NY
- Average sunshine days in December: 6.6 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is February (5.3 days).
Average UV index in December
Mattydale, NY
- 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 January, February and December (UV index 1).
Average cloud cover in December
Mattydale, NY
- Average cloud cover in December: 70
The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Mattydale, 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).
Mattydale, New York, USA
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