Bar Harbor Weather in May
With daytime temperatures of 18°C (64°F) and nighttime lows of 8°C (46°F), May in Bar Harbor brings moderate temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 104 mm (4.1 in) falls on average.
Rainfall in Bar Harbor in May
Analyzing past climate data, one can expect approximately 12 days of rain, averaging 104 mm (4.1 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Bar Harbor in May
If you're visiting Bar Harbor in May, expect highs of 18°C (64°F) and overnight lows around 8°C (46°F). Conditions are often most pleasant around the middle of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Bar Harbor's climate page.
Bar Harbor Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
18°C (64°F)
Chance of Rain
40%
Precipitation
104 mm (4.1 in)
Rainy days
12 days
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Bar Harbor typically rise from around 15°C (59°F) at the start of May to approximately 19°C (66°F) by the end. Nights are cold, with lows typically ranging from 4°C (39°F) to 10°C (50°F).
Average temperatures in May
Historical weather for Bar Harbor in May
Browse day-by-day weather records for Bar Harbor spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Bar Harbor historical weather extremes in May
According to our 33 years of weather records for Bar Harbor, the following extremes were recorded between 1993 and 2026.
- The warmest day in May was on May 3, 2001, with a maximum of 32°C (90°F).
- The lowest daytime temperature in May was 6°C (43°F), recorded on May 18, 2007.
- Nighttime temperatures dropped to -2°C (28°F) on May 1, 2008, marking the coldest May night on record.
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Bar Harbor in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes.What To Do in Bar Harbor in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Bar Harbor's climate page.
See the full Bar Harbor climate overview or explore weather in the United States of America.
