Bar Harbor weather by month
What a typical year looks like in Bar Harbor, Maine: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at East Surry, 23 km from Bar Harbor; records cover 2011–2026.
The year at a glance
- Precipitation a year
- 49.4 in1254 mm
- Snow a year
- Rare
- Last spring freeze
- May 12
- First fall freeze
- Oct 3
- Heating degree days
- 7,649
- Cooling degree days
- 221
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −6°−21° (heating, 99%) and 88°31° (cooling, 1%).
Month by month
Bar Harbor in January
Highs average 30°−1° and lows 11°−12°, with 4.1 in103 mm of precipitation in a typical January.
- Record high
- 53°12° (2020)
- Record low
- −16°−27° (2015)
- Heating degree days
- 1393
- Cooling degree days
- 0
Bar Harbor in February
Highs average 32°0° and lows 12°−11°, with 3.6 in91 mm of precipitation in a typical February.
- Record high
- 58°14° (2022)
- Record low
- −17°−27° (2015)
- Heating degree days
- 1200
- Cooling degree days
- 0
Bar Harbor in March
Highs average 40°5° and lows 22°−6°, with 4.2 in107 mm of precipitation in a typical March.
- Record high
- 82°28° (2012)
- Record low
- −6°−21° (2014)
- Heating degree days
- 1054
- Cooling degree days
- 0
Bar Harbor in April
Highs average 52°11° and lows 32°0°, with 4.3 in108 mm of precipitation in a typical April.
- Record high
- 79°26° (2017)
- Record low
- 14°−10° (2016)
- Heating degree days
- 700
- Cooling degree days
- 0
Bar Harbor in May
Highs average 63°17° and lows 42°5°, with 3.7 in94 mm of precipitation in a typical May.
- Record high
- 90°32° (2026)
- Record low
- 26°−3° (2023)
- Heating degree days
- 392
- Cooling degree days
- 3
Bar Harbor in June
Highs average 71°22° and lows 51°11°, with 4.5 in114 mm of precipitation in a typical June.
- Record high
- 97°36° (2024)
- Record low
- 30°−1° (2020)
- Heating degree days
- 135
- Cooling degree days
- 21
Bar Harbor in July
Highs average 77°25° and lows 57°14°, with 3.1 in79 mm of precipitation in a typical July.
- Record high
- 95°35° (2011)
- Record low
- 44°7° (2020)
- Heating degree days
- 24
- Cooling degree days
- 98
Bar Harbor in August
Highs average 77°25° and lows 56°14°, with 3.1 in80 mm of precipitation in a typical August.
- Record high
- 93°34° (2026)
- Record low
- 40°4° (2025)
- Heating degree days
- 26
- Cooling degree days
- 79
Bar Harbor in September
Highs average 69°21° and lows 49°10°, with 3.9 in100 mm of precipitation in a typical September.
- Record high
- 89°32° (2023)
- Record low
- 30°−1° (2020)
- Heating degree days
- 192
- Cooling degree days
- 20
Bar Harbor in OctoberThis month
Highs average 57°14° and lows 38°3°, with 5.1 in129 mm of precipitation in a typical October.
- Record high
- 83°28° (2011)
- Record low
- 20°−7° (2020)
- Heating degree days
- 536
- Cooling degree days
- 0
Bar Harbor in November
Highs average 46°8° and lows 29°−2°, with 4.9 in124 mm of precipitation in a typical November.
- Record high
- 72°22° (2022)
- Record low
- 5°−15° (2018)
- Heating degree days
- 827
- Cooling degree days
- 0
Bar Harbor in December
Highs average 36°2° and lows 19°−7°, with 5 in126 mm of precipitation in a typical December.
- Record high
- 59°15° (2020)
- Record low
- −13°−25° (2017)
- Heating degree days
- 1170
- Cooling degree days
- 0