Bar Harbor, ME Climate & Monthly Averages
Bar Harbor has a humid continental climate. July is the hottest month, averaging 74° by day; January is the coldest at 33°.
Winter sets the pace in 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).
July
74° by day 62° at nightJanuary
33° by day 19° at nightThe cold-weather pattern in numbers
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.
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.
More climate facts for Bar Harbor
- 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%
From snow season to the warmest stretch 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.
The coldest and warmest values in the dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.
Planning around winter in Bar Harbor
The easier weather window
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.
Cold-weather packing
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.
Monthly highs, lows and seasonal change
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 33° | 19° | 11 | 4.8 in | 5.7 h/day | 9.2 h | 35% | 73% |
| February | 33° | 19° | 11 | 3.8 in | 6.6 h/day | 10.4 h | 39% | 72% |
| March | 39° | 26° | 11 | 4.3 in | 7.6 h/day | 11.8 h | 35% | 71% |
| April | 48° | 36° | 12 | 4.4 in | 8.3 h/day | 13.4 h | 40% | 73% |
| May | 59° | 46° | 10 | 3.2 in | 10.0 h/day | 14.8 h | 31% | 75% |
| June | 67° | 55° | 10 | 3.8 in | 10.4 h/day | 15.5 h | 35% | 80% |
| July | 74° | 62° | 10 | 3.4 in | 10.8 h/day | 15.2 h | 33% | 82% |
| August | 73° | 62° | 9 | 4.1 in | 10.3 h/day | 14.0 h | 30% | 82% |
| September | 68° | 57° | 8 | 4.2 in | 9.1 h/day | 12.4 h | 28% | 81% |
| October | 58° | 47° | 10 | 4.7 in | 7.3 h/day | 10.9 h | 34% | 79% |
| November | 46° | 36° | 10 | 4.2 in | 6.2 h/day | 9.5 h | 33% | 74% |
| December | 38° | 26° | 12 | 5.3 in | 5.3 h/day | 8.9 h | 39% | 74% |
The route from winter to summer, month by month
Each card shows the average high and low. The bar places that month between Bar Harbor's coldest night and warmest afternoon.
January
- Rain
- 11 days
- Sunshine
- 5.7 h
- Daylight
- 9.2 h
- Snow
- 6 days
February
- Rain
- 11 days
- Sunshine
- 6.6 h
- Daylight
- 10.4 h
- Snow
- 6 days
March
- Rain
- 11 days
- Sunshine
- 7.6 h
- Daylight
- 11.8 h
- Snow
- 4 days
April
- Rain
- 12 days
- Sunshine
- 8.3 h
- Daylight
- 13.4 h
- Snow
- 2 days
May
- Rain
- 10 days
- Sunshine
- 10.0 h
- Daylight
- 14.8 h
June
- Rain
- 10 days
- Sunshine
- 10.4 h
- Daylight
- 15.5 h
July
- Rain
- 10 days
- Sunshine
- 10.8 h
- Daylight
- 15.2 h
August
- Rain
- 9 days
- Sunshine
- 10.3 h
- Daylight
- 14.0 h
September
- Rain
- 8 days
- Sunshine
- 9.1 h
- Daylight
- 12.4 h
October
- Rain
- 10 days
- Sunshine
- 7.3 h
- Daylight
- 10.9 h
November
- Rain
- 10 days
- Sunshine
- 6.2 h
- Daylight
- 9.5 h
- Snow
- 1 day
December
- Rain
- 12 days
- Sunshine
- 5.3 h
- Daylight
- 8.9 h
- Snow
- 4 days
Looking for warmer alternatives? Browse warm places by month, or compare Bar Harbor's coolest part of the year: January, February, December.
Where Bar Harbor sits among other climates
- 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.
These comparisons use the same ten-year window for every city in the dataset.