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
The coldest period in Arlington, Massachusetts, tends to be January, when average temperatures fluctuate between a high of 33.4°F (0.8°C) and a low of 21.7°F (-5.7°C).Humidity
In Arlington, Massachusetts, the average relative humidity in January is 77%.Rainfall
In Arlington, in January, during 7.8 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Arlington, during the entire year, the rain falls for 142.8 days and collects up to 27.36" (695mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Arlington, Massachusetts, during January, snow falls for 7.7 days and regularly aggregates up to 3.07" (78mm) of snow. Throughout the year, in Arlington, there are 29.6 snowfall days, and 17.8" (452mm) of snow is accumulated.Daylight
In January, the average length of the day in Arlington is 9h and 30min.On the first day of the month, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of January, in Arlington, Massachusetts, sunrise is at 6:59 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. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 2 in January translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What time of the year is the coldest in Arlington?
How cold is January in Arlington?
What is the average humidity in January in Arlington?
How much does it rain in Arlington in January?
How much does it snow in Arlington in January?
What is the average length of the day in January in Arlington?
When is the sunrise / sunset in January in Arlington?
How long on average sun shines in January in Arlington?
When is the lowest UV index in Arlington?
How high is the UV index in January in Arlington?
Average temperature in January
Arlington, MA
- Average high temperature in January: 33.4°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in January: 21.7°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in January
Arlington, MA
- Average pressure in January: 30.01"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Arlington, MA
- Average wind speed in January: 9.4mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in January
Arlington, 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 (70%).
Average rainfall in January
Arlington, MA
- Average rainfall in January: 2.24"
The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in January
Arlington, MA
- Average rainfall days in January: 7.8 days
The months with the highest number of rainy days are May and July (15.3 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in January
Arlington, MA
- Average snowfall in January: 3.07"
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
Arlington, MA
- Average snowfall days in January: 7.7 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Arlington, 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 42min).
Average sunshine days in January
Arlington, MA
- Average sunshine days in January: 17.4 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is April (13.3 days).
Average UV index in January
Arlington, 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
Arlington, 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
Arlington, MA
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Arlington, Massachusetts, USA
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