Weather in January
Temperature
January is the coldest month, exhibiting average temperatures of 30.2°F (-1°C) at the peak and 15.8°F (-9°C) at the base.Rainfall
January and February are months with the least rain when the rain falls for 16 days and typically aggregates up to 2.01" (51mm) of rain.Ocean temperature
In Greater Rochester International Airport, the average seawater temperature in January is 37.4°F (3°C).Note: In swimming engagements, this poses immediate life-threatening risks. The loss of breath control is instantaneous, thereby hindering clear thought. A specialized swimsuit is mandatory to limit thermal dissipation.
Daylight
In January, the average length of the day is 9h and 26min.On the first day of the month, sunrise is at 7:42 am and sunset at 4:45 pm. On the last day of January, sunrise is at 7:27 am and sunset at 5:20 pm EST.
Sunshine
The months with the least sunshine are January, November and December, with an average of 3h 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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 1 during January leads to these instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
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Average temperature in January
Greater Rochester International Airport, NY
- Average high temperature in January: 30°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in January: 16°F
The months with the highest average low temperature are July and August (59°F).
The coldest months (with the lowest average low temperature) are January and February (16°F).
Average rainfall in January
Greater Rochester International Airport, NY
- Average rainfall in January: 2"
The wettest month (with the highest rainfall) is August (3.3").
The driest months (with the least rainfall) are January and February (2").
Average rainfall days in January
Greater Rochester International Airport, NY
- Average rainfall days in January: 16 days
The month with the highest number of rainy days is December (17 days).
The month with the least rainy days is July (9 days).
Average sea temperature in January
Greater Rochester International Airport, NY
- Average sea temperature in January: 37°F
The best month for swimming (with the highest average sea temperature) is August (70°F).
The coldest months (with the lowest average sea temperature) are February and March (36°F).
Average daylight in January /
Average sunshine in January
Greater Rochester International Airport, 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: 3h
The months with the most sunshine are June and July (Average sunshine: 10h).
The months with the least sunshine are January, November and December (Average sunshine: 3h).
Average UV index in January
Greater Rochester International Airport, NY
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are January and December (UV index 1).
Greater Rochester International Airport, New York, USA
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