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
January, with its average high-temperature of 34.2°F and an average low-temperature of 22.6°F, holds the record as the coldest month in Boston.Humidity
In Boston, the average relative humidity in January is 76%.Rainfall
In Boston, in January, during 7.9 rainfall days, 2.28" of precipitation is typically accumulated. Throughout the year, there are 141.4 rainfall days, and 27.2" of precipitation is accumulated.Snowfall
Months with snowfall in Boston are January through May, October through December. In Boston, during January, snow falls for 7.6 days and regularly aggregates up to 2.76" of snow. Throughout the year, in Boston, there are 29.8 snowfall days, and 15.75" of snow is accumulated.Ocean temperature
In January, the average ocean temperature is 41.4°F.Note: You can swim in 41.4°F below 50°F with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 55.4°F without it is tough.
Daylight
In Boston, the average length of the day in January is 9h and 30min.On the first day of January, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:56 pm EST.
Sunshine
In January, the average sunshine in Boston 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 Boston. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
FAQ
What month is the coldest in Boston?
How cold is it in Boston in January?
What is the average humidity in January in Boston?
How many days does it rain in January in Boston?
How many days does it snow in January in Boston?
What is the ocean temperature in January in Boston?
What is the average length of the day in January in Boston?
What time are sunrise and sunset in January in Boston?
How many hours of sunshine does Boston have in January?
What is the month with the lowest UV index in Boston?
How high is the UV index in January in Boston?
Average temperature in January
Boston, MA
- Average high temperature in January: 34.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in January: 22.6°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in January
Boston, 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
Boston, MA
- Average wind speed in January: 9.9mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Boston, MA
- Average humidity in January: 76%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in January
Boston, MA
- Average rainfall in January: 2.28"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in January
Boston, MA
- Average rainfall days in January: 7.9 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in January
Boston, MA
- Average snowfall in January: 2.76"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Boston, MA
- Average snowfall days in January: 7.6 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
Boston, MA
- Average sea temperature in January: 41.3°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in January /
Average sunshine in January
Boston, MA
- Average daylight in January: 9h and 3min
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 6min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in January
Boston, MA
- Average sunshine days in January: 17.5 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in January
Boston, 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
Boston, MA
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Boston, 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).
Boston, Massachusetts, USA
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