Click on a day for an hourly weather forecast
The temperatures in Maine in May are comfortable with low of 12°C and and high up to 22°C.
You can expect rain for roughly half of the month of May in Maine. 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 Maine in May 2025.
If you’re planning to visit Maine in the near future, we highly recommend that you review the 14 day weather forecast for Maine before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -8° | 2 | 19 | 9 | 27 mm | Awful | Maine in January |
| February | 2° / -7° | 1 | 18 | 9 | 36 mm | Awful | Maine in February |
| March | 11° / 1° | 5 | 22 | 5 | 63 mm | Bad | Maine in March |
| April | 16° / 6° | 6 | 23 | 2 | 95 mm | Ok | Maine in April |
| May | 22° / 12° | 8 | 23 | 0 | 170 mm | Ok | Maine in May |
| June | 28° / 18° | 9 | 21 | 0 | 179 mm | Good | Maine in June |
| July | 30° / 19° | 7 | 24 | 0 | 114 mm | Ok | Maine in July |
| August | 29° / 18° | 7 | 24 | 0 | 154 mm | Ok | Maine in August |
| September | 26° / 14° | 6 | 24 | 0 | 107 mm | Perfect | Maine in September |
| October | 18° / 8° | 5 | 25 | 1 | 83 mm | Good | Maine in October |
| November | 10° / 2° | 2 | 26 | 2 | 33 mm | Bad | Maine in November |
| December | 3° / -5° | 3 | 22 | 7 | 48 mm | Awful | Maine in December |