Click on a day for an hourly weather forecast
The temperatures in Bar Harbor in May are quite cold with temperatures between 7°C and 15°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Bar Harbor. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Bar Harbor in May 2025.
If you’re planning to visit Bar Harbor in the near future, we highly recommend that you review the 14 day weather forecast for Bar Harbor before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -8° | 6 | 10 | 15 | 147 mm | Awful | Bar Harbor in January |
| February | -1° / -7° | 6 | 8 | 14 | 137 mm | Awful | Bar Harbor in February |
| March | 3° / -4° | 8 | 11 | 12 | 131 mm | Awful | Bar Harbor in March |
| April | 9° / 2° | 9 | 18 | 3 | 151 mm | Awful | Bar Harbor in April |
| May | 15° / 7° | 9 | 22 | 0 | 125 mm | Ok | Bar Harbor in May |
| June | 20° / 11° | 7 | 23 | 0 | 134 mm | Ok | Bar Harbor in June |
| July | 23° / 15° | 5 | 27 | 0 | 97 mm | Perfect | Bar Harbor in July |
| August | 24° / 15° | 4 | 27 | 0 | 93 mm | Perfect | Bar Harbor in August |
| September | 20° / 12° | 5 | 25 | 0 | 97 mm | Good | Bar Harbor in September |
| October | 14° / 7° | 7 | 23 | 1 | 161 mm | Ok | Bar Harbor in October |
| November | 7° / 1° | 7 | 18 | 5 | 147 mm | Awful | Bar Harbor in November |
| December | 2° / -3° | 8 | 12 | 11 | 191 mm | Awful | Bar Harbor in December |