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Monthly climate in Bar Harbor, Maine, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Bar Harbor features a humid continental climate (Dfb).Temperatures typically range between -4 °C (25 °F) and 20 °C (68 °F) through the year, but rarely can drop to -23 °C (-8 °F) or can rise to as high as 30 °C (86 °F).The average annual precipitation amounts to about 1185 mm (46.7 inches) and receives 120 rainy days on the 1 mm (0.04 inches) threshold annually.Bar Harbor enjoys an average of 2943 hours of sunshine throughout the year, and daylight varies from 8 hours 52 minutes to 15 hours 28 minutes per day.

Monthly average temperatures in Bar Harbor, Maine, United States §

The warmest months in Bar Harbor are July, August and September, with daily mean temperatures ranging from 16 to 20 °C (61 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, Bar Harbor experiences 13 days above 25 °C (77.0 °F) and 108 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bar Harbor, 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)		 13°C
(56°F)		 14°C
(58°F)		 18°C
(65°F)		 25°C
(78°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 27°C
(81°F)		 21°C
(70°F)		 17°C
(63°F)		 15°C
(59°F)
Mean maximum 9°C
(48°F)		 10°C
(50°F)		 10°C
(50°F)		 15°C
(59°F)		 23°C
(74°F)		 25°C
(78°F)		 28°C
(83°F)		 28°C
(82°F)		 25°C
(77°F)		 20°C
(68°F)		 16°C
(61°F)		 13°C
(56°F)
Average high -0°C
(32°F)		 1°C
(33°F)		 3°C
(38°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(67°F)		 23°C
(73°F)		 23°C
(74°F)		 20°C
(67°F)		 14°C
(58°F)		 7°C
(46°F)		 2°C
(36°F)
Daily mean -4°C
(25°F)		 -3°C
(26°F)		 -0°C
(32°F)		 6°C
(43°F)		 11°C
(52°F)		 16°C
(61°F)		 19°C
(67°F)		 20°C
(68°F)		 16°C
(61°F)		 11°C
(52°F)		 4°C
(40°F)		 -1°C
(30°F)
Average low -8°C
(19°F)		 -7°C
(19°F)		 -4°C
(26°F)		 3°C
(37°F)		 8°C
(46°F)		 13°C
(55°F)		 16°C
(61°F)		 17°C
(62°F)		 13°C
(56°F)		 8°C
(47°F)		 1°C
(35°F)		 -5°C
(24°F)
Mean minimum -19°C
(-2°F)		 -18°C
(0°F)		 -15°C
(5°F)		 -2°C
(28°F)		 4°C
(39°F)		 8°C
(47°F)		 12°C
(55°F)		 13°C
(55°F)		 8°C
(46°F)		 3°C
(37°F)		 -8°C
(18°F)		 -15°C
(5°F)
Minimum -23°C
(-8°F)		 -20°C
(-4°F)		 -18°C
(0°F)		 -4°C
(24°F)		 2°C
(36°F)		 6°C
(42°F)		 11°C
(53°F)		 12°C
(53°F)		 5°C
(42°F)		 -0°C
(32°F)		 -15°C
(6°F)		 -22°C
(-7°F)

Compare climate in Bar Harbor with other places

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

Monthly average precipitation in Bar Harbor, Maine, United States §

Bar Harbor usually has the most precipitation in April, November and December, with an average of 12 rainy days and 133 mm (5.2 inches) of precipitation per month.The driest months in Bar Harbor are March, June and August. On average, 75 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bar Harbor, 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) 98 (3.9) 90 (3.6) 73 (2.9) 129 (5.1) 92 (3.6) 79 (3.1) 80 (3.2) 73 (2.9) 95 (3.7) 107 (4.2) 130 (5.1) 138 (5.4)
Average precipitation days (≥ 1 mm) 9 10 9 13 11 9 10 8 7 11 12 11

Monthly sunshine hours in Bar Harbor, Maine, United States §

The sunniest months in Bar Harbor are June, July and August, when the sun shines an average of 10 hours 26 minutes a day.Least sunny months in Bar Harbor: January, November and December receive an average of 5 hours 22 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Bar Harbor, 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 141 188 257 244 292 316 318 325 281 224 183 170
Mean daily daylight hours 9h 15m 10h 27m 11h 57m 13h 29m 14h 48m 15h 28m 15h 6m 13h 56m 12h 27m 10h 55m 9h 34m 8h 52m

Solar UV radiation in Bar Harbor, Maine, United States §

Bar Harbor experiences the highest level of ultraviolet (UV) radiation in May, June and August, 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 Bar Harbor UV Index data.

Average daily maximum UV levels by month for Bar Harbor, 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 8 8 7 5 3 2