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
The arrival of December corresponds with a temperature reduction, down from November's chilly 45.9°F (7.7°C) to a cold 36.3°F (2.4°C). Irondequoit marks an average drop to a subzero cold 28.6°F (-1.9°C) during nighttime in December, following the high of the day.Humidity
In December, the average relative humidity is 81%.Rainfall
In Irondequoit, in December, during 10.7 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Irondequoit, during the entire year, the rain falls for 167.9 days and collects up to 31.18" (792mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 12.8 days. Throughout December, 4.37" (111mm) of snow is accumulated. Throughout the year, there are 62.3 snowfall days, and 20.63" (524mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:23 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:42 am and sunset at 4:45 pm EST.
Sunshine
In December, the average sunshine is 3h.UV index
January 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 ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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 many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Irondequoit have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Irondequoit have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Irondequoit, NY
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in December
Irondequoit, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Irondequoit, NY
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is January (13.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in December
Irondequoit, NY
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall in December
Irondequoit, NY
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is October (3.23").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Irondequoit, NY
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in December
Irondequoit, NY
- Average snowfall in December: 4.37"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Irondequoit, NY
- Average snowfall days in December: 12.8 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Irondequoit, NY
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Irondequoit, NY
- Average sunshine days in December: 8.1 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Irondequoit, NY
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Irondequoit, NY
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in December
Irondequoit, NY
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Irondequoit, New York, USA
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