Bar Harbor, ME Climate & Monthly Averages
The climate of Bar Harbor
A 23°C spread between its warmest and coolest months puts Bar Harbor among the more strongly seasonal places we cover. July averages 74°F (23°C) by day; January averages 33°F (0°C), with nights at 19°F (-7°C).
Climate quick facts
- Hottest month: July - highs near 74°F (23°C)
- Coldest month: January - highs near 33°F (0°C)
- Decade extremes (2015-2024): 94°F (35°C) high · -17°F (-27°C) low
- Wettest month: December (12 rainy days) · Sunniest: July (10.8 h sun/day)
- Climate type: humid continental
- Annual swing: 23°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 24 days a year
- Months with freezing average lows: 4
- Average humidity: 76%
Temperatures through the year
Warmth peaks in July: highs of 74°F (23°C), lows of 62°F (16°C). January sits at the other end of the year: 33°F (0°C) by day, 19°F (-7°C) at night. The gridded 2015-2024 daily record for this location tops out at 94°F (35°C) and bottoms at -17°F (-27°C) - decade extremes, not all-time station records. The wettest month is December (5.3 inches (136 mm) across 12 days) and the driest May.
Rain, sun and snow
Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is June through September. Sunshine averages 8.1 hours a day over the year - duller than about 81% of the cities we track, peaking in July at 10.8 hours. Overnight lows average at or below freezing for 4 months, December through March. Days and nights are about 7°C apart on average - narrower than about 85% of the cities we track.
How Bar Harbor compares
- Bar Harbor averages 47°F (8°C) across the year - cooler than all but 4% of the 3496 cities we track.
- 29% of the year's precipitation falls in its wettest three months - more evenly spread than all but 9% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 33° | 19° | 11 | 4.8 in | 5.7 h/day | 73% |
| February | 33° | 19° | 11 | 3.8 in | 6.6 h/day | 72% |
| March | 39° | 26° | 11 | 4.3 in | 7.6 h/day | 71% |
| April | 48° | 36° | 12 | 4.4 in | 8.3 h/day | 73% |
| May | 59° | 46° | 10 | 3.2 in | 10.0 h/day | 75% |
| June | 67° | 55° | 10 | 3.8 in | 10.4 h/day | 80% |
| July | 74° | 62° | 10 | 3.4 in | 10.8 h/day | 82% |
| August | 73° | 62° | 9 | 4.1 in | 10.3 h/day | 82% |
| September | 68° | 57° | 8 | 4.2 in | 9.1 h/day | 81% |
| October | 58° | 47° | 10 | 4.7 in | 7.3 h/day | 79% |
| November | 46° | 36° | 10 | 4.2 in | 6.2 h/day | 74% |
| December | 38° | 26° | 12 | 5.3 in | 5.3 h/day | 74% |
Bar Harbor month by month
Bar Harbor weather in January
January brings highs around 33°F (0°C), lows near 19°F (-7°C), about 11 wet days and roughly 6 snowy days - typically the coldest month of the year in Bar Harbor.
Bar Harbor weather in February
February brings highs around 33°F (1°C), lows near 19°F (-7°C), about 11 wet days and roughly 6 snowy days.
Bar Harbor weather in March
March brings highs around 39°F (4°C), lows near 26°F (-3°C), about 11 wet days and roughly 4 snowy days.
Bar Harbor weather in April
April brings highs around 48°F (9°C), lows near 36°F (2°C), about 12 wet days and roughly 2 snowy days.
Bar Harbor weather in May
May brings highs around 59°F (15°C), lows near 46°F (8°C), about 10 wet days - typically the driest month of the year in Bar Harbor.
Bar Harbor weather in June
June brings highs around 67°F (20°C), lows near 55°F (13°C), about 10 wet days.
Bar Harbor weather in July
July brings highs around 74°F (23°C), lows near 62°F (16°C), about 10 wet days - typically the hottest month and the sunniest month of the year in Bar Harbor.
Bar Harbor weather in August
August brings highs around 73°F (23°C), lows near 62°F (17°C), about 9 wet days.
Bar Harbor weather in September
September brings highs around 68°F (20°C), lows near 57°F (14°C), about 8 wet days.
Bar Harbor weather in October
October brings highs around 58°F (14°C), lows near 47°F (8°C), about 10 wet days.
Bar Harbor weather in November
November brings highs around 46°F (8°C), lows near 36°F (2°C), about 10 wet days and roughly 1 snowy days.
Bar Harbor weather in December
December brings highs around 38°F (3°C), lows near 26°F (-3°C), about 12 wet days and roughly 4 snowy days - typically the wettest month of the year in Bar Harbor.
Seasons in Bar Harbor
Spring (March through May)
Spring stays firmly cold here - highs near 49°F (9°C), nights near 36°F (2°C), and rain falls on around 33 of the 90 days, plus about 7 snowy days.
Summer (June through August)
Through summer, Bar Harbor is mild and warm: 71°F (22°C) by day, 60°F (15°C) after dark, and rain falls on around 30 of the 90 days. Daylight is generous - around 10.5 hours of sun a day.
Fall (September through November)
Fall in Bar Harbor stays on the cool side of mild, with daytime highs averaging 57°F (14°C) and nights around 47°F (8°C); expect showers on roughly 29 days across the season.
Winter (December through February)
Winter is frigid here - highs near 35°F (1°C), nights near 22°F (-6°C), and rain falls on around 34 of the 90 days, plus about 17 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Climate questions, answered
How often does it rain in Bar Harbor?
Are nights cold in Bar Harbor?
What should I pack for Bar Harbor?
Is Bar Harbor cold in winter?
Is Bar Harbor humid?
Best time to visit Bar Harbor
The best time to visit Bar Harbor is generally June to September, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 70°F (21°C), with rain on about 10 days a month. For the same question asked the other way round, see where else is warm in June.
Pack for Bar Harbor with a heavy insulated coat, hat and gloves for winter and a compact umbrella or rain shell. Even in July, lows of 62°F (16°C) make an extra layer worth the space.
Bar Harbor temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.