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
With average high temperatures of 32.5°F (0.3°C) and lows of 20.1°F (-6.6°C), January is the coldest month.Humidity
The average relative humidity in January in Acton is 78%.Rainfall
In Acton, during January, the rain falls for 5.5 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Acton, during the entire year, the rain falls for 116.3 days and collects up to 15.87" (403mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Acton, during January, snow falls for 6.4 days and regularly aggregates up to 2.05" (52mm) of snow. In Acton, during the entire year, snow falls for 25.5 days and aggregates up to 11.42" (290mm) of snow.Daylight
In Acton, the average length of the day in January is 9h and 29min.On the first day of the month, sunrise is at 7:15 am and sunset at 4:23 pm. On the last day of January, sunrise is at 7:00 am and sunset at 4:57 pm EST.
Sunshine
In January, the average sunshine is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Acton. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during January leads to these advisories:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is it in Acton in January?
What is the average humidity in January?
How much does it rain in Acton in January?
How much does it snow in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Acton have in January?
What are the months with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Acton, MA
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in January: 20.1°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in January
Acton, 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
Acton, MA
- Average wind speed in January: 8.6mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in January
Acton, MA
- Average humidity in January: 78%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall in January
Acton, MA
- Average rainfall in January: 1.18"
The wettest month (with the highest rainfall) is October (1.65").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in January
Acton, MA
- Average rainfall days in January: 5.5 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in January
Acton, MA
- Average snowfall in January: 2.05"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Acton, MA
- Average snowfall days in January: 6.4 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Acton, 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 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in January
Acton, MA
- Average sunshine days in January: 19.4 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is April (15.8 days).
Average UV index in January
Acton, 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
Acton, 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 34).
Average visibility in January
Acton, 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).
Acton, Massachusetts, USA
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