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 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
January is the coldest month, with an average high-temperature of 36.7°F (2.6°C) and an average low-temperature of 27.3°F (-2.6°C).Humidity
In Rochester, the average relative humidity in January is 75%.Rainfall
In January, the rain falls for 8.5 days. Throughout January, 1.18" (30mm) of precipitation is accumulated. In Rochester, during the entire year, the rain falls for 136.3 days and collects up to 15.63" (397mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Rochester, in January, during 6.6 snowfall days, 0.83" (21mm) of snow is typically accumulated. Throughout the year, there are 21.6 snowfall days, and 4.29" (109mm) of snow is accumulated.Daylight
In Rochester, the average length of the day in January is 9h and 34min.On the first day of the month, sunrise is at 7:10 am and sunset at 4:23 pm. On the last day of January, sunrise is at 6:56 am and sunset at 4:56 pm EST.
Sunshine
The average sunshine in January is 5.1h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rochester. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 2 in January transforms into this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Rochester?
How cold is January?
What is the average humidity in January in Rochester?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does Rochester have in January?
When are sunrise and sunset in January?
How long on average sun shines in January in Rochester?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Rochester, MA
- Average high temperature in January: 36.7°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in January: 27.3°F
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in January
Rochester, MA
- Average pressure in January: 30"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Rochester, MA
- Average wind speed in January: 12.9mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in January
Rochester, MA
- Average humidity in January: 75%
The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March and November (74%).
Average rainfall in January
Rochester, MA
- Average rainfall in January: 1.18"
The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in January
Rochester, MA
- Average rainfall days in January: 8.5 days
The months with the highest number of rainy days are May and July (14.1 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in January
Rochester, MA
- Average snowfall in January: 0.83"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Rochester, MA
- Average snowfall days in January: 6.6 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rochester, MA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Rochester, MA
- Average sunshine days in January: 16.8 days
The month with the most sunshine days is December (17.7 days).
The month with the least sunshine days is April (14.3 days).
Average UV index in January
Rochester, MA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Rochester, MA
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in January
Rochester, MA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rochester, Massachusetts, USA
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