Climateby Month

Bar Harbor vs Portland weather

Bar Harbor, ME and Portland, ME · 114 mi apart

July highs: 79°F in Bar Harbor, 80°F in Portland (Portland is 1°F warmer). January highs: 33°F and 32°F (Bar Harbor is 1°F warmer). Bar Harbor has about 139 wet days a year, Portland about 131.

Bar Harbor, ME

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

Best months: June, August, September

Portland, ME

0°20°40°60°80° January: normal high 32°F (0°C), low 16°F (-9°C) 32° 16° February: normal high 35°F (2°C), low 17°F (-8°C) March: normal high 42°F (6°C), low 26°F (-3°C) April: normal high 54°F (12°C), low 35°F (2°C) May: normal high 64°F (18°C), low 46°F (8°C) June: normal high 74°F (23°C), low 55°F (13°C) July: normal high 80°F (27°C), low 61°F (16°C) 80° 61° August: normal high 79°F (26°C), low 60°F (16°C) September: normal high 71°F (22°C), low 52°F (11°C) October: normal high 60°F (16°C), low 41°F (5°C) November: normal high 48°F (9°C), low 32°F (0°C) December: normal high 38°F (3°C), low 22°F (-6°C) JFMAMJJASOND

Best months: June, September

Which city for what

  • More comfortable days: Bar Harbor (104 a year vs 76 a year)

Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.

Season by season

SeasonAvg high Bar HarborAvg high PortlandWet days Bar HarborWet days Portland
Winter (Dec-Feb)35°F35°F3634
Spring (Mar-May)53°F53°F3835
Summer (Jun-Aug)77°F77°F3232
Fall (Sep-Nov)59°F60°F3431

Side by side over a year

Bar HarborPortland
Hot days (90°F+)35
Freezing nights141144
Muggy days–16
Comfortable days10476
Precipitation55.5 in48.1 in
Snowfall–68.7 in
Frost dateslast Apr 27, first Oct 22last Apr 26, first Oct 15
Daylight in June / December15.5 h / 8.9 h15.4 h / 9.0 h
Best monthsJune, August, SeptemberJune, September

Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F (one city judged by temperature only).

Month by month

MonthHigh Bar HarborHigh PortlandWet days Bar HarborWet days Portland
January33°F32°F1211
February35°F35°F1010
March42°F42°F1211
April53°F54°F1211
May65°F64°F1413
June74°F74°F1212
July79°F80°F1111
August78°F79°F99
September71°F71°F119
October59°F60°F1211
November48°F48°F1111
December38°F38°F1412

Both charts use the same temperature scale.

Where the numbers come from

  • Bar Harbor, ME: temperature from Acadia NP (USC00170100), 2.9 mi WSW of the city center; precipitation from Acadia NP (USC00170100). NOAA 1991-2020 normals and daily records.
  • Portland, ME: temperature from Portland Intl Jetport (USW00014764), 2.4 mi WSW of the city center; precipitation from Portland Intl Jetport (USW00014764). NOAA 1991-2020 normals and daily records.

Every station for each city, including humidity and frost, is listed on the city page. Methodology.