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 48.6°F (9.2°C) in November to an icy 38.5°F (3.6°C). During the nights in December, the temperature in East Rochester averages to a subzero cold 27.5°F (-2.5°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In East Rochester, Pennsylvania, in December, it is raining for 11.5 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in East Rochester, Pennsylvania, there are 168.7 rainfall days, and 21.22" (539mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In East Rochester, in December, snow falls for 12 days, with typically accumulated 2.44" (62mm) of snow. Throughout the year, there are 60.6 snowfall days, and 11.93" (303mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:26 am and sunset at 4:54 pm. On the last day of December, in East Rochester, sunrise is at 7:44 am and sunset at 5:03 pm EST.
Sunshine
The average sunshine in December in East Rochester is 3.3h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: The UV index of 1 in December translates into these instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
Is it cold in East Rochester during December?
What is the average humidity in December in East Rochester?
How much does it rain in East Rochester in December?
How many days does it snow in December in East Rochester?
What is the month with the shortest days in East Rochester?
How many hours of daylight does East Rochester have in December?
When are sunrise and 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?
What is the UV index reading in December in East Rochester?
Average temperature in December
East Rochester, PA
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
East Rochester, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
East Rochester, PA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
East Rochester, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
East Rochester, PA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in December
East Rochester, PA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (10 days).
Average snowfall in December
East Rochester, PA
- Average snowfall in December: 2.44"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
East Rochester, PA
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
East Rochester, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
East Rochester, PA
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
East Rochester, PA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
East Rochester, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
East Rochester, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
East Rochester, Pennsylvania, USA
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