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
East Rochester's weather in December involves a decrease in the average high-temperature, moving down from November's frosty 46.2°F (7.9°C) to a wintry 36°F (2.2°C). December notes an average low temperature of 27.1°F (-2.7°C) in East Rochester, New York, subtly down from the daytime highs.Humidity
In December, the average relative humidity in East Rochester 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, it is snowing for 15 days. Throughout December, 4.13" (105mm) of snow is accumulated. In East Rochester, during the entire year, snow falls for 70.8 days and aggregates up to 20.16" (512mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in East Rochester, New York.On the first day of the month, sunrise is at 7:22 am and sunset at 4:36 pm. On the last day of December, in East Rochester, sunrise is at 7:41 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in East Rochester is 3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in East Rochester. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
How cold is December in East Rochester?
What is the average humidity in December in East Rochester?
How much does it rain in East Rochester in December?
How much does it snow in East Rochester in December?
What is the month with the shortest days in East Rochester?
How many hours of daylight does East Rochester have in December?
When is the sunrise / sunset in December in East Rochester?
How many hours of sunshine does East Rochester have in December?
When is the lowest UV index in East Rochester?
How high is the UV index in December in East Rochester?
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 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 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).
East Rochester, New York, USA
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