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 | 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% |
Bar Harbor month by month
Average high and low for each month, with the bar showing where it sits in Bar Harbor's year (left is the coldest night, right is the 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
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
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. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.