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
Charlestown reaches its lowest average temperatures in January, measuring 33.8°F (1°C) at the peak and 22.5°F (-5.3°C) at the lowest.Humidity
The average relative humidity in January in Charlestown is 77%.Rainfall
In Charlestown, in January, it is raining for 2.9 days, with typically 0.35" (9mm) of accumulated precipitation. In Charlestown, during the entire year, the rain falls for 47.8 days and collects up to 4.13" (105mm) of precipitation.Snowfall
January through May, November and December are months with snowfall in Charlestown. In January, in Charlestown, it is snowing for 3.4 days. Throughout January, 0.2" (5mm) of snow is accumulated. Throughout the year, in Charlestown, there are 13.2 snowfall days, and 2.17" (55mm) of snow is accumulated.Daylight
The average length of the day in January in Charlestown is 9h and 30min.On the first day of the month, sunrise is at 7:13 am and sunset at 4:21 pm. On the last day of January, in Charlestown, Massachusetts, sunrise is at 6:58 am and sunset at 4:56 pm EST.
Sunshine
The average sunshine in January is 5.2h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Charlestown, Massachusetts. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the coldest time of year in Charlestown?
How cold is January in Charlestown?
What is the average humidity in January in Charlestown?
How much does it rain in Charlestown in January?
How many days does it snow in January in Charlestown?
What is the average length of the day in January in Charlestown?
When are sunrise and sunset in January in Charlestown?
How many hours of sunshine does Charlestown have in January?
What are the months with the lowest UV index in Charlestown?
How high is the UV index in January in Charlestown?
Average temperature in January
Charlestown, MA
- Average high temperature in January: 33.8°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in January: 22.5°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in January
Charlestown, MA
- Average pressure in January: 30.01"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
Charlestown, MA
- Average wind speed in January: 9.6mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in January
Charlestown, MA
- Average humidity in January: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (69%).
Average rainfall in January
Charlestown, MA
- Average rainfall in January: 0.35"
The wettest month (with the highest rainfall) is November (0.55").
The driest month (with the least rainfall) is September (0.12").
Average rainfall days in January
Charlestown, MA
- Average rainfall days in January: 2.9 days
The month with the highest number of rainy days is April (5.9 days).
The months with the least rainy days are January and September (2.9 days).
Average snowfall in January
Charlestown, MA
- Average snowfall in January: 0.2"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Charlestown, MA
- Average snowfall days in January: 3.4 days
The month with the highest number of snowfall days is January (3.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Charlestown, 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
Charlestown, MA
- Average sunshine days in January: 25 days
The month with the most sunshine days is December (25.5 days).
The month with the least sunshine days is July (22.8 days).
Average UV index in January
Charlestown, 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
Charlestown, MA
- 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
Charlestown, 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).
Charlestown, Massachusetts, USA
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