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Monthly climate in Greenville, Maine, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Greenville features a humid continental climate (Dfb).Temperatures typically range between -9 °C (16 °F) and 19 °C (67 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 33 °C (91 °F).The average annual precipitation amounts to about 1145 mm (45.1 inches) and receives 128 rainy days on the 1 mm (0.04 inches) threshold annually.Greenville enjoys an average of 2786 hours of sunshine throughout the year, and daylight varies from 8 hours 45 minutes to 15 hours 36 minutes per day.

Monthly average temperatures in Greenville, Maine, United States §

The warmest months in Greenville are June, July and August, with daily mean temperatures ranging from 16 to 19 °C (61 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -6 °C (16 - 21 °F) throughout the day. On average each year, Greenville experiences 30 days above 25 °C (77.0 °F) and 152 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Greenville, 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 10°C
(51°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(68°F)		 30°C
(86°F)		 32°C
(89°F)		 33°C
(91°F)		 32°C
(89°F)		 30°C
(87°F)		 24°C
(75°F)		 21°C
(70°F)		 14°C
(57°F)
Mean maximum 6°C
(43°F)		 7°C
(45°F)		 8°C
(47°F)		 15°C
(60°F)		 27°C
(81°F)		 28°C
(82°F)		 29°C
(85°F)		 30°C
(87°F)		 26°C
(80°F)		 21°C
(70°F)		 16°C
(60°F)		 10°C
(50°F)
Average high -5°C
(23°F)		 -3°C
(26°F)		 1°C
(33°F)		 7°C
(45°F)		 16°C
(61°F)		 21°C
(71°F)		 24°C
(76°F)		 24°C
(75°F)		 20°C
(67°F)		 12°C
(54°F)		 4°C
(39°F)		 -2°C
(28°F)
Daily mean -9°C
(16°F)		 -8°C
(19°F)		 -4°C
(26°F)		 3°C
(38°F)		 10°C
(51°F)		 16°C
(61°F)		 19°C
(67°F)		 19°C
(66°F)		 14°C
(58°F)		 8°C
(47°F)		 0°C
(33°F)		 -6°C
(21°F)
Average low -13°C
(9°F)		 -12°C
(11°F)		 -8°C
(19°F)		 -1°C
(31°F)		 5°C
(41°F)		 11°C
(51°F)		 15°C
(59°F)		 14°C
(58°F)		 10°C
(50°F)		 5°C
(40°F)		 -3°C
(27°F)		 -10°C
(15°F)
Mean minimum -23°C
(-10°F)		 -22°C
(-8°F)		 -20°C
(-4°F)		 -8°C
(18°F)		 -1°C
(31°F)		 5°C
(41°F)		 9°C
(49°F)		 9°C
(48°F)		 3°C
(37°F)		 -2°C
(29°F)		 -13°C
(9°F)		 -20°C
(-4°F)
Minimum -29°C
(-20°F)		 -24°C
(-11°F)		 -24°C
(-12°F)		 -14°C
(7°F)		 -2°C
(28°F)		 1°C
(33°F)		 8°C
(47°F)		 7°C
(44°F)		 -0°C
(32°F)		 -6°C
(22°F)		 -19°C
(-2°F)		 -26°C
(-14°F)

Compare climate in Greenville with other places

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

Monthly average precipitation in Greenville, Maine, United States §

Greenville usually has the most precipitation in April, October and November, with an average of 11 rainy days and 115 mm (4.5 inches) of precipitation per month.The driest months in Greenville are February, March and September. On average, 79 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Greenville, 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) 86 (3.4) 82 (3.2) 75 (3.0) 115 (4.5) 98 (3.9) 86 (3.4) 103 (4.0) 88 (3.5) 80 (3.2) 124 (4.9) 106 (4.2) 101 (4.0)
Average precipitation days (≥ 1 mm) 9 10 9 12 11 12 13 12 8 10 12 10

Monthly sunshine hours in Greenville, Maine, United States §

The sunniest months in Greenville are June, July and August, when the sun shines an average of 10 hours 32 minutes a day.Least sunny months in Greenville: January, November and December receive an average of 4 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Greenville, 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 125 174 236 215 281 322 324 322 278 191 159 154
Mean daily daylight hours 9h 9m 10h 23m 11h 57m 13h 33m 14h 54m 15h 36m 15h 13m 14h 0m 12h 28m 10h 53m 9h 28m 8h 45m

Solar UV radiation in Greenville, Maine, United States §

Greenville experiences the highest level of ultraviolet (UV) radiation in April, May and June, when the maximum UV index can reach values of 8 - 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 Greenville UV Index data.

Average daily maximum UV levels by month for Greenville, 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) 2 4 5 8 9 10 8 8 7 5 3 2