Bar Harbor, ME Weather
Bar Harbor hourly forecast: next 24 hours
Today's high of 82°F (28°C) is about 9°F (5°C) above the typical August high of 73°F (23°C).
Current conditions in detail
Bar Harbor weather tomorrow (Thursday, August 27)
Tomorrow in Bar Harbor looks overcast, with a high of 71° and an overnight low of 59°. Precipitation chance is modest at 20%. Winds top out near 10 mph, and the UV index reaches 6 (high).
Bar Harbor 14-day forecast
About the weather 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).
Bar Harbor weather: 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.
Season by season
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.
Average temperatures in Bar Harbor by month
| 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% |