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Monthly climate in Rockland, Maine, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Rockland features a humid continental climate (Dfb).Temperatures typically range between -1 °C (31 °F) and 18 °C (64 °F) through the year, but rarely can drop to -17 °C (1 °F) or can rise to as high as 23 °C (74 °F).The average annual precipitation amounts to about 1329 mm (52.3 inches) and receives 121 rainy days on the 1 mm (0.04 inches) threshold annually.Rockland enjoys an average of 2985 hours of sunshine throughout the year, and daylight varies from 8 hours 55 minutes to 15 hours 25 minutes per day.

Monthly average temperatures in Rockland, Maine, United States §

The warmest months in Rockland are July, August and September, with daily mean temperatures ranging from 16 to 18 °C (61 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -1 to 1 °C (31 - 34 °F) throughout the day. On average each year, Rockland experiences 0 days above 25 °C (77.0 °F) and 77 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rockland, 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 11°C
(51°F)		 10°C
(50°F)		 11°C
(52°F)		 14°C
(58°F)		 20°C
(68°F)		 22°C
(72°F)		 23°C
(74°F)		 23°C
(74°F)		 22°C
(72°F)		 19°C
(66°F)		 17°C
(62°F)		 14°C
(57°F)
Mean maximum 10°C
(50°F)		 8°C
(47°F)		 9°C
(48°F)		 11°C
(52°F)		 16°C
(61°F)		 19°C
(66°F)		 22°C
(71°F)		 22°C
(73°F)		 20°C
(68°F)		 18°C
(64°F)		 15°C
(60°F)		 13°C
(55°F)
Average high 2°C
(36°F)		 2°C
(36°F)		 3°C
(38°F)		 7°C
(45°F)		 11°C
(52°F)		 15°C
(59°F)		 18°C
(64°F)		 19°C
(66°F)		 17°C
(63°F)		 14°C
(57°F)		 9°C
(48°F)		 4°C
(40°F)
Daily mean -1°C
(31°F)		 -1°C
(31°F)		 1°C
(34°F)		 5°C
(42°F)		 9°C
(49°F)		 14°C
(57°F)		 17°C
(62°F)		 18°C
(64°F)		 16°C
(61°F)		 12°C
(54°F)		 6°C
(44°F)		 1°C
(35°F)
Average low -4°C
(26°F)		 -3°C
(26°F)		 -1°C
(30°F)		 4°C
(39°F)		 8°C
(47°F)		 12°C
(54°F)		 15°C
(60°F)		 17°C
(62°F)		 15°C
(59°F)		 11°C
(52°F)		 4°C
(40°F)		 -1°C
(30°F)
Mean minimum -14°C
(8°F)		 -13°C
(10°F)		 -11°C
(13°F)		 -1°C
(31°F)		 4°C
(40°F)		 9°C
(48°F)		 13°C
(55°F)		 14°C
(58°F)		 11°C
(53°F)		 5°C
(42°F)		 -5°C
(24°F)		 -10°C
(13°F)
Minimum -17°C
(1°F)		 -14°C
(7°F)		 -13°C
(8°F)		 -3°C
(28°F)		 3°C
(37°F)		 8°C
(46°F)		 12°C
(54°F)		 14°C
(57°F)		 10°C
(50°F)		 2°C
(35°F)		 -11°C
(12°F)		 -17°C
(1°F)

Compare climate in Rockland with other places

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

Monthly average precipitation in Rockland, Maine, United States §

Rockland usually has the most precipitation in April, October and December, with an average of 12 rainy days and 147 mm (5.8 inches) of precipitation per month.The driest months in Rockland are March, June and August. On average, 84 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rockland, 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) 106 (4.2) 108 (4.3) 86 (3.4) 151 (5.9) 97 (3.8) 82 (3.2) 98 (3.9) 84 (3.3) 97 (3.8) 147 (5.8) 128 (5.0) 143 (5.6)
Average precipitation days (≥ 1 mm) 9 10 10 14 10 8 10 8 8 12 11 11

Monthly sunshine hours in Rockland, Maine, United States §

The sunniest months in Rockland are June, July and August, when the sun shines an average of 10 hours 44 minutes a day.Least sunny months in Rockland: January, November 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 Rockland, 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 144 188 259 244 294 326 326 335 283 222 186 172
Mean daily daylight hours 9h 17m 10h 28m 11h 57m 13h 28m 14h 46m 15h 25m 15h 4m 13h 54m 12h 27m 10h 56m 9h 36m 8h 55m

Solar UV radiation in Rockland, Maine, United States §

Rockland experiences the highest level of ultraviolet (UV) radiation in May, June and July, 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 Rockland UV Index data.

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