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Monthly climate in Acton, Maine, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Acton features a humid continental climate (Dfb).Temperatures typically range between -4 °C (24 °F) and 22 °C (72 °F) through the year, but rarely can drop to -25 °C (-12 °F) or can rise to as high as 37 °C (98 °F).The average annual precipitation amounts to about 1225 mm (48.2 inches) and receives 124 rainy days on the 1 mm (0.04 inches) threshold annually.Acton enjoys an average of 2956 hours of sunshine throughout the year, and daylight varies from 8 hours 59 minutes to 15 hours 21 minutes per day.

Monthly average temperatures in Acton, Maine, United States §

The warmest months in Acton are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (67 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -2 °C (24 - 29 °F) throughout the day. On average each year, Acton experiences 63 days above 25 °C (77.0 °F) and 120 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Acton, Maine, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 16°C
(61°F)		 22°C
(71°F)		 20°C
(69°F)		 28°C
(83°F)		 34°C
(94°F)		 36°C
(98°F)		 37°C
(98°F)		 35°C
(95°F)		 33°C
(91°F)		 28°C
(82°F)		 23°C
(74°F)		 16°C
(60°F)
Mean maximum 11°C
(53°F)		 14°C
(58°F)		 17°C
(63°F)		 22°C
(72°F)		 32°C
(89°F)		 32°C
(90°F)		 34°C
(94°F)		 33°C
(92°F)		 31°C
(87°F)		 25°C
(77°F)		 19°C
(67°F)		 14°C
(57°F)
Average high -0°C
(32°F)		 2°C
(35°F)		 6°C
(42°F)		 12°C
(54°F)		 19°C
(66°F)		 25°C
(77°F)		 27°C
(81°F)		 27°C
(81°F)		 23°C
(74°F)		 16°C
(61°F)		 8°C
(46°F)		 2°C
(36°F)
Daily mean -4°C
(24°F)		 -3°C
(27°F)		 1°C
(33°F)		 7°C
(45°F)		 14°C
(57°F)		 19°C
(67°F)		 22°C
(72°F)		 22°C
(71°F)		 18°C
(64°F)		 11°C
(52°F)		 3°C
(38°F)		 -2°C
(29°F)
Average low -9°C
(17°F)		 -8°C
(18°F)		 -4°C
(25°F)		 3°C
(37°F)		 8°C
(47°F)		 14°C
(57°F)		 17°C
(64°F)		 17°C
(63°F)		 13°C
(55°F)		 7°C
(45°F)		 -1°C
(31°F)		 -6°C
(22°F)
Mean minimum -20°C
(-4°F)		 -19°C
(-2°F)		 -15°C
(4°F)		 -3°C
(27°F)		 2°C
(36°F)		 8°C
(47°F)		 12°C
(54°F)		 11°C
(51°F)		 5°C
(42°F)		 -0°C
(31°F)		 -10°C
(14°F)		 -17°C
(1°F)
Minimum -25°C
(-12°F)		 -23°C
(-10°F)		 -19°C
(-2°F)		 -5°C
(24°F)		 1°C
(33°F)		 4°C
(39°F)		 10°C
(50°F)		 9°C
(48°F)		 2°C
(35°F)		 -3°C
(27°F)		 -15°C
(4°F)		 -24°C
(-11°F)

Compare climate in Acton with other places

Compare temperature, precipitation, sunshine, UV index in Acton, Maine, United States with other places around the world.

Monthly average precipitation in Acton, Maine, United States §

Acton usually has the most precipitation in April, July and October, with an average of 12 rainy days and 137 mm (5.4 inches) of precipitation per month.The driest months in Acton are January, May and September. On average, 76 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Acton, Maine, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 79 (3.1) 89 (3.5) 80 (3.2) 132 (5.2) 77 (3.0) 93 (3.7) 153 (6.0) 87 (3.4) 73 (2.9) 126 (5.0) 111 (4.4) 125 (4.9)
Average precipitation days (≥ 1 mm) 8 11 9 12 10 11 13 11 7 11 11 10

Monthly sunshine hours in Acton, Maine, United States §

The sunniest months in Acton are June, July and August, when the sun shines an average of 10 hours 47 minutes a day.Least sunny months in Acton: January, February and December receive an average of 5 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Acton, Maine, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 146 178 253 238 284 327 329 335 289 211 186 173
Mean daily daylight hours 9h 21m 10h 30m 11h 58m 13h 27m 14h 43m 15h 21m 15h 0m 13h 52m 12h 26m 10h 57m 9h 39m 8h 59m

Solar UV radiation in Acton, Maine, United States §

Acton experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Acton UV Index data.

Average daily maximum UV levels by month for Acton, Maine, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 4 5 8 9 10 9 9 7 5 3 2