December weather forecastEast Rochester, NY
December
Weather in December
December, the first month of the winter in East Rochester, is still a cold month, with an average temperature fluctuating between 36°F (2.2°C) and 27.1°F (-2.7°C).Temperature
December indicates a shift in the average high-temperature, from November's chilly 46.2°F (7.9°C) to a wintry 36°F (2.2°C). December nights register a minor temperature decline, steadying at a freezing cold 27.1°F (-2.7°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In East Rochester, during December, the rain falls for 10.2 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 163.3 rainfall days, and 23.7" (602mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In East Rochester, in December, during 15 snowfall days, 4.13" (105mm) of snow is typically accumulated. Throughout the year, there are 70.8 snowfall days, and 20.16" (512mm) 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 December, sunrise is at 7:22 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:45 pm EST.
Sunshine
In East Rochester, the average sunshine in December is 3h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 suggests this advice:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
East Rochester, NY
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in December
East Rochester, 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
East Rochester, NY
- Average wind speed in December: 10.6mph
The windiest months (with the highest average wind speed) are January and February (11.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
East Rochester, NY
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is September (76%).
Average rainfall in December
East Rochester, NY
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in December
East Rochester, NY
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in December
East Rochester, NY
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
East Rochester, NY
- Average snowfall days in December: 15 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
East Rochester, NY
- Average daylight in December: 9h and 6min
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 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
East Rochester, NY
- Average sunshine days in December: 8.1 days
The months with the most sunshine days are May and September (12.8 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in December
East Rochester, 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
East Rochester, NY
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
East Rochester, 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).
