January weather forecastRochester, NH
January
Weather in January
Weather conditions in January in Rochester, New Hampshire, USA, present the height of winter, complete with snowfall and chilly temperatures. The cold is punctuated by an average highest temperature of a frosty 29.7°F (-1.3°C) and a lowest average temperature of 17.4°F (-8.1°C), while 6.26" (159mm) of snow typically graces the city. As the calendar flips from December to January, less snow seems to fall, and the number of daylight hours starts to inch upward. Despite the cold, the city offers a winter charm and relative dryness, with a lower average rainfall compared to later in the year.Temperature
Rochester's January weather reaches an average high of 29.7°F (-1.3°C) and an average low of 17.4°F (-8.1°C), making it the coldest month.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 82%.Rainfall
In Rochester, in January, it is raining for 7.6 days, with typically 2.28" (58mm) of accumulated precipitation. In Rochester, during the entire year, the rain falls for 143.1 days and collects up to 29.06" (738mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In January, it is snowing for 10.4 days. Throughout January, 6.26" (159mm) of snow is accumulated. Throughout the year, there are 40 snowfall days, and 27.8" (706mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 25min.On the first day of the month, sunrise is at 7:16 am and sunset at 4:18 pm. On the last day of January, sunrise is at 7:00 am and sunset at 4:53 pm EST.
Sunshine
In Rochester, New Hampshire, the average sunshine in January is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: During January, 2 as the daily maximum UV index converts into the following advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rochester, NH
- Average high temperature in January: 29.7°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in January: 17.4°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in January
Rochester, NH
- Average pressure in January: 29.99"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Rochester, NH
- Average wind speed in January: 9.3mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in January
Rochester, NH
- Average humidity in January: 82%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is April (75%).
Average rainfall in January
Rochester, NH
- Average rainfall in January: 2.28"
The wettest months (with the highest rainfall) are October and December (3.11").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in January
Rochester, NH
- Average rainfall days in January: 7.6 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in January
Rochester, NH
- Average snowfall in January: 6.26"
The month with the highest snowfall is December (6.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Rochester, NH
- Average snowfall days in January: 10.4 days
The month with the highest number of snowfall days is January (10.4 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, NH
- Average daylight in January: 9h and 24min
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 0min).
- Average sunshine in January: 5h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Rochester, NH
- Average sunshine days in January: 16.3 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.3 days).
Average UV index in January
Rochester, NH
- Average UV index in January: 2
The months with the highest UV index are 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, NH
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Rochester, NH
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
