Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
With average high and low temperatures of 29.3°F (-1.5°C) and 19.8°F (-6.8°C) respectively, January is Rochester's coldest month.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 84%.Rainfall
In Rochester, in January, during 9.8 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 172.4 rainfall days, and 29.45" (748mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Rochester, in January, snow falls for 17.6 days, with typically accumulated 5.79" (147mm) of snow. Throughout the year, there are 70.9 snowfall days, and 27.44" (697mm) of snow is accumulated.Ocean temperature
In January, the average ocean temperature is 37.9°F (3.3°C).Note: When swimming, this is deemed life-endangering and extremely risky. The painful cold water instigates fast-paced hyperventilation. Wearing a specialized swimsuit is necessary to lessen thermal harm.
Daylight
In January, the average length of the day is 9h and 25min.On the first day of January, sunrise is at 7:42 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:20 pm EST.
Sunshine
The months with the least sunshine are January and February, with an average of 2.7h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 1 in January interprets into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January in Rochester?
How much does it snow in January?
What is the water temperature in January?
What is the average length of the day in January?
What time are sunrise and sunset in January in Rochester?
What are the months with the least sunshine?
How many hours of sunshine does Rochester have in January?
What are the months with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Rochester, NY
- Average high temperature in January: 29.3°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in January: 19.8°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in January
Rochester, NY
- Average pressure in January: 30.05"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 January
Rochester, NY
- Average wind speed in January: 11.6mph
The windiest month (with the highest average wind speed) is January (11.6mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in January
Rochester, NY
- Average humidity in January: 84%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are August and September (76%).
Average rainfall in January
Rochester, NY
- Average rainfall in January: 1.97"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in January
Rochester, NY
- Average rainfall days in January: 9.8 days
The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in January
Rochester, NY
- Average snowfall in January: 5.79"
The month with the highest snowfall is February (7.01").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Rochester, NY
- Average snowfall days in January: 17.6 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 sea temperature in January
Rochester, NY
- Average sea temperature in January: 38°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is March (35.8°F).
Average daylight in January /
Average sunshine in January
Rochester, NY
- Average daylight in January: 9h and 2min
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 January: 2h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 2h and 42min).
Average sunshine days in January
Rochester, NY
- Average sunshine days in January: 7.2 days
The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in January
Rochester, NY
- Average UV index in January: 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 January
Rochester, NY
- Average cloud cover in January: 74
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in January
Rochester, NY
- Average visibility in January: 5mi
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).
Rochester, New York, USA
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