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
January, marked by an average high-temperature of 32°F (0°C) and a low-temperature of 19.8°F (-6.8°C), is the coldest month.Humidity
The average relative humidity in January is 78%.Rainfall
In Westford, Massachusetts, in January, it is raining for 6.6 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 140.4 rainfall days, and 27.13" (689mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Westford, in January, during 8.7 snowfall days, 4.49" (114mm) of snow is typically accumulated. In Westford, during the entire year, snow falls for 35.1 days and aggregates up to 24.88" (632mm) of snow.Daylight
In January, the average length of the day is 9h and 29min.On the first day of the month, sunrise is at 7:15 am and sunset at 4:22 pm. On the last day of January, sunrise is at 7:00 am and sunset at 4:57 pm EST.
Sunshine
In Westford, 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 of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In January, a regular UV index of 2 translates into these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Enhance your sun protection with tightly woven, yet airy clothing. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is January?
What is the average humidity in January?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Westford have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Westford have in January?
When is the lowest UV index?
How high is the UV index in January?
Average temperature in January
Westford, MA
- Average high temperature in January: 32°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in January: 19.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in January
Westford, 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
Westford, MA
- Average wind speed in January: 8.5mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in January
Westford, MA
- Average humidity in January: 78%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).
Average rainfall in January
Westford, MA
- Average rainfall in January: 2.09"
The wettest month (with the highest rainfall) is December (2.72").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in January
Westford, MA
- Average rainfall days in January: 6.6 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in January
Westford, MA
- Average snowfall in January: 4.49"
The month with the highest snowfall is February (6.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Westford, MA
- Average snowfall days in January: 8.7 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Westford, MA
- Average daylight in January: 9h and 3min
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 6min).
- Average sunshine in January: 5h and 1min
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
Westford, MA
- Average sunshine days in January: 17.3 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in January
Westford, 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
Westford, 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 33).
Average visibility in January
Westford, MA
- Average visibility in January: 6mi
The months with the highest visibility are January, March, April, May, July, August, October, November and December (6mi).
The months with the lowest visibility are February, June and September (5mi).
Westford, Massachusetts, USA
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