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 is the coldest month, with an average high-temperature of 34.2°F (1.2°C) and an average low-temperature of 22.6°F (-5.2°C).Humidity
The average relative humidity in January in Chelsea is 76%.Rainfall
In Chelsea, during January, the rain falls for 7.9 days and regularly aggregates up to 2.28" (58mm) of precipitation. In Chelsea, Massachusetts, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Chelsea, Massachusetts, in January, snow falls for 7.6 days, with typically accumulated 2.76" (70mm) of snow. Throughout the year, there are 29.8 snowfall days, and 15.75" (400mm) of snow is accumulated.Ocean temperature
In Chelsea, in January, the average water temperature is 41.4°F (5.2°C).Note: Dipping into 41.4°F (5.2°C) below 50°F (10°C) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 55.4°F (13°C) feels cold to the bone.
Daylight
In January, the average length of the day is 9h and 30min.On the first day of January, sunrise is at 7:13 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:56 pm EST.
Sunshine
The average sunshine in January in Chelsea is 5.1h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 during January translates into the following guidance:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
What is the coldest month in Chelsea?
How cold is it in Chelsea in January?
What is the average humidity in January in Chelsea?
How much does it rain in Chelsea in January?
How much does it snow in Chelsea in January?
How cold is the water in January in Chelsea?
How many hours of daylight does Chelsea have in January?
When are sunrise and sunset in January in Chelsea?
How long on average sun shines in January in Chelsea?
What are the months with the lowest UV index in Chelsea?
What is the UV index intensity in January in Chelsea?
Average temperature in January
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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
Chelsea, 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).
Chelsea, Massachusetts, USA
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