Climateby Month

Bar Harbor, ME climate by month

NOAA 1991-2020 normals · 54 ft elevation

Bar Harbor has mild summers and cold winters. Highs peak at 79°F in July and fall to 33°F in January. Wet days are spread through the year, from about 9 to 14 a month. By our comfort score the best months are June, August and September.

Warmest month
79°F
July normal high
Coldest month
15°F
January normal low
Wet days a year
139
55.5 in of precipitation
Hot days a year
3
90°F or hotter

How warm is Bar Harbor?

Normal highs range from 33°F in January to 79°F in July.

0°20°40°60°80° January: normal high 33°F (1°C), low 15°F (-9°C) 33° 15° February: normal high 35°F (2°C), low 18°F (-8°C) March: normal high 42°F (6°C), low 25°F (-4°C) April: normal high 53°F (12°C), low 35°F (2°C) May: normal high 65°F (18°C), low 45°F (7°C) June: normal high 74°F (23°C), low 54°F (12°C) July: normal high 79°F (26°C), low 60°F (16°C) 79° 60° August: normal high 78°F (26°C), low 60°F (16°C) September: normal high 71°F (22°C), low 53°F (12°C) October: normal high 59°F (15°C), low 43°F (6°C) November: normal high 48°F (9°C), low 33°F (1°C) December: normal high 38°F (3°C), low 22°F (-6°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Bar Harbor?

December has the most wet days (about 14); the year brings about 56 in of precipitation.

January: 12 wet days February: 10 wet days March: 12 wet days April: 12 wet days May: 14 wet days June: 12 wet days July: 11 wet days August: 9 wet days 9 September: 11 wet days October: 12 wet days November: 11 wet days December: 14 wet days 14 JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is Bar Harbor?

Humidity data is not available for this location.

How much daylight?

Daylight ranges from about 8.9 hours in December to 15.5 hours in June.

January: 9.3 hours of daylight February: 10.5 hours of daylight March: 11.9 hours of daylight April: 13.5 hours of daylight May: 14.8 hours of daylight June: 15.5 hours of daylight 15.5 July: 15.1 hours of daylight August: 14.0 hours of daylight September: 12.5 hours of daylight October: 11.0 hours of daylight November: 9.6 hours of daylight December: 8.9 hours of daylight 8.9 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Bar Harbor, 1991-2020
MonthHighLowPrecip.Wet daysDaylight
January 33°F15°F 4.5 in12 9.3 h
February 35°F18°F 3.8 in10 10.5 h
March 42°F25°F 4.9 in12 11.9 h
April 53°F35°F 5.2 in12 13.5 h
May 65°F45°F 4.5 in14 14.8 h
June 74°F54°F 4.3 in12 15.5 h
July 79°F60°F 3.3 in11 15.1 h
August 78°F60°F 3.5 in9 14.0 h
September 71°F53°F 4.2 in11 12.5 h
October 59°F43°F 5.9 in12 11.0 h
November 48°F33°F 5.9 in11 9.6 h
December 38°F22°F 5.7 in14 8.9 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Bar Harbor

By our comfort score, the best months are June, August and September.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 240824
Feb 290621
Mar 381813
Apr 53372
May 701480
Jun 802071
Jul 781861
Aug 782061
Sep 782270
Oct 51680
Nov 37186
Dec 2501018

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. Comfortable days here are judged by temperature only (no humidity station nearby). How the score works.

Frost dates in Bar Harbor

The last spring frost typically comes around Apr 27, and the first fall frost around Oct 22, leaving 177 frost-free days in a typical year.

Frost and freeze dates for Bar Harbor
Typical date1 year in 10
Last spring frost (32°F)Apr 27after May 8
First fall frost (32°F)Oct 22before Oct 6
Last hard freeze (28°F)Apr 15after Apr 27
First hard freeze (28°F)Nov 2before Oct 18
Frost-free season177 daysunder 157 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Acadia NP (USC00170100), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Maine.

Hottest and coldest readings, 1991-2020

The highest reading was 96°F (May 23, 1992); the lowest was -21°F (January 20, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Bar Harbor

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain and frost dates: Acadia NP (USC00170100), 2.9 mi WSW of the city center, 470 ft (416 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Not available for this location: snowfall, snow depth, humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error