Climate and monthly weather forecastActon, MA
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Acton, Massachusetts, with an average temperature varying between 20.1°F (-6.6°C) and 32.5°F (0.3°C). 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. Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Acton, Massachusetts, with an average temperature fluctuating between 21°F (-6.1°C) and 35.2°F (1.8°C). The advent of February brings an average high-temperature of a still wintry 35.2°F (1.8°C), exhibiting minor difference from the previous month. Weather in February »Weather in March
March, the first month of the spring in Acton, is a chilly month, with an average temperature fluctuating between 28.9°F (-1.7°C) and 43°F (6.1°C). The shift into March is marked by a modest rise in the average high-temperature, moving from February's cold 35.2°F (1.8°C) to a frosty 43°F (6.1°C). Weather in March »Weather in April
April is a mild spring month in Acton, Massachusetts, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 39°F (3.9°C). April's onset brings a rise in the average high-temperature, moving from a frosty 43°F (6.1°C) in March to a mild 55.9°F (13.3°C). Weather in April »Weather in May
May, the last month of the spring in Acton, is an enjoyable month, with an average temperature varying between 67.5°F (19.7°C) and 48.7°F (9.3°C). The shift into May brings an increase in the average high-temperature, moving from a refreshing 55.9°F (13.3°C) in April to an enjoyable 67.5°F (19.7°C). Weather in May »Weather in June
June, the first month of the summer in Acton, is a warm month, with an average temperature varying between 56.5°F (13.6°C) and 75.6°F (24.2°C). Acton in June denotes a subtle temperature transition, adjusting from an average high of a comfortable 67.5°F (19.7°C) in May to a moderately hot 75.6°F (24.2°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Acton, Massachusetts, with an average temperature ranging between min 63.3°F (17.4°C) and max 82.4°F (28°C). July, with average temperatures reaching a high of 82.4°F (28°C) and a low of 63.3°F (17.4°C), is the warmest month. In July, the heat index is computed to be a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Acton, is another warm month, with an average temperature ranging between max 81°F (27.2°C) and min 62.1°F (16.7°C). The start of August sees the average high-temperature at a still warm 81°F (27.2°C), showing little difference from July's 82.4°F (28°C). Weather in August »Weather in September
September, the first month of the autumn in Acton, is also an agreeable month, with an average temperature fluctuating between 55.6°F (13.1°C) and 72.9°F (22.7°C). A moderate decline in average high-temperatures is noted in September, moving from a warm 81°F (27.2°C) in August to a pleasant 72.9°F (22.7°C). Weather in September »Weather in October
October, like September, is another refreshing autumn month in Acton, Massachusetts, with temperature in the range of an average high of 60.1°F (15.6°C) and an average low of 46°F (7.8°C). The start of October involves a temperature drop, moving from a pleasant 72.9°F (22.7°C) in September to a moderate 60.1°F (15.6°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Acton, Massachusetts, with an average temperature ranging between min 35.4°F (1.9°C) and max 48.6°F (9.2°C). The decrease of average high-temperatures is mild in November, with a decline from a moderate 60.1°F (15.6°C) in October to a chilly 48.6°F (9.2°C). Weather in November »Weather in December
December, the first month of the winter in Acton, is also an icy month, with an average temperature varying between 38.3°F (3.5°C) and 27.3°F (-2.6°C). December implies a gentle temperature shift, with average high-temperatures reducing from November's chilly 48.6°F (9.2°C) to a cold 38.3°F (3.5°C). Weather in December »Updated: Jun 16, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Acton notes the coldest temperatures in January, with a average high of 32.5°F (0.3°C) and a low of 20.1°F (-6.6°C).
In Acton, during the entire year, the rain falls for 116.3 days and collects up to 15.87" (403mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 25.5 snowfall days, and 11.42" (290mm) of snow is accumulated.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the most humid month, with an average relative humidity of 79%.
The month with the most snowfall is February, when snow falls for 5.9 days and typically aggregates up to 2.87" (73mm) of snow.
The month with the least sunshine is February, with an average of 4.5h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April is the least humid month, with an average relative humidity of 70%.
In Acton, snow does not fall in June through September.
The month with the longest days is June, with an average of 15h and 12min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July, recording an average high temperature of 82.4°F (28°C) and a low temperature of 63.3°F (17.4°C), is Acton's warmest month.
With an average of 10.3h of sunshine, August has the most sunshine of the year.
September is the month with the least rainfall. Rain falls for 8.6 days and accumulates 0.79" (20mm) of precipitation.
October is the month with the most rainfall. Rain falls for 10.6 days and accumulates 1.65" (42mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Acton, MA
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).
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
Acton, MA
- Average pressure in January:
30.01"Hg - Average pressure in February:
29.99"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.03"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
Acton, MA
- Average wind speed in January:
8.6mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.4mph - Average wind speed in April:
8mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.6mph - Average wind speed in December:
8.2mph
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
Acton, MA
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall
Acton, MA
- Average rainfall in January:
1.18" - Average rainfall in February:
1.06" - Average rainfall in March:
1.46" - Average rainfall in April:
1.61" - Average rainfall in May:
1.22" - Average rainfall in June:
1.54"
- Average rainfall in July:
1.3" - Average rainfall in August:
1.18" - Average rainfall in September:
0.79" - Average rainfall in October:
1.65" - Average rainfall in November:
1.54" - Average rainfall in December:
1.34"
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
Acton, MA
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
5.4 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
12.8 days - Average rainfall days in June:
12.5 days
- Average rainfall days in July:
13.2 days - Average rainfall days in August:
11.3 days - Average rainfall days in September:
8.6 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
7.5 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
Acton, MA
- Average snowfall in January:
2.05" - Average snowfall in February:
2.87" - Average snowfall in March:
2.44" - Average snowfall in April:
1.18" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
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
Acton, MA
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
5.9 days - Average snowfall days in March:
6.3 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
4.2 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 / Average sunshine
Acton, MA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
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 - Average sunshine in February:
4h and 30min - Average sunshine in March:
5h and 42min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 6min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 18min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 48min
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
Acton, MA
- Average sunshine days in January:
19.4 days - Average sunshine days in February:
17.1 days - Average sunshine days in March:
16.2 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
16.4 days - Average sunshine days in June:
16.1 days
- Average sunshine days in July:
16.2 days - Average sunshine days in August:
17.6 days - Average sunshine days in September:
19.4 days - Average sunshine days in October:
18 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
19.1 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
Acton, MA
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
Acton, MA
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
Acton, MA
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).
