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 decrease in the average high-temperature, falling from November's chilly 44.2°F (6.8°C) to a wintry 34.9°F (1.6°C). December introduces a small decrease to a nighttime average of 26.2°F (-3.2°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In December, the rain falls for 8.1 days. Throughout December, 1.97" (50mm) of precipitation is accumulated. In South Dayton, during the entire year, the rain falls for 170.3 days and collects up to 32.36" (822mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 11.3 days. Throughout December, 4.65" (118mm) of snow is accumulated. Throughout the year, there are 59.1 snowfall days, and 27.6" (701mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:26 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:53 pm EST.
Sunshine
The average sunshine in December is 2.6h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in South Dayton in December?
What is the average humidity in December?
How much does it rain in South Dayton in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does South Dayton have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does South Dayton have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
South Dayton, NY
- Average high temperature in December: 34.9°F
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in December: 26.2°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 (18°F).
Average pressure in December
South Dayton, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
South Dayton, NY
- Average wind speed in December: 10.8mph
The windiest month (with the highest average wind speed) is January (11.5mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
South Dayton, NY
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is September (80%).
Average rainfall in December
South Dayton, NY
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in December
South Dayton, NY
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in December
South Dayton, NY
- Average snowfall in December: 4.65"
The month with the highest snowfall is November (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
South Dayton, NY
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Dayton, NY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 2h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
South Dayton, NY
- Average sunshine days in December: 12.6 days
The month with the most sunshine days is March (14 days).
The month with the least sunshine days is May (8.4 days).
Average UV index in December
South Dayton, NY
- 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
South Dayton, NY
- Average cloud cover in December: 74
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
South Dayton, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
South Dayton, New York, USA
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