Rainy days · Maine
How often does it rain in Portland, Maine?
Portland, Maine takes its rain the way it takes its lobster: often, and with no fuss.
Portland, Maine gets measurable rain or snow on about 131 days a year, adding up to about 48 inches.
November usually brings Portland about 11 wet days and 4.3 inches. The wettest month is usually May, with about 13 wet days, and the driest is September, with about 9 wet days. That makes Portland number 31 of the 129 US cities we track, rainiest first.
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Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 11 | 3.5 |
| February | 10 | 3.5 |
| March | 11 | 4.1 |
| April | 11 | 4.4 |
| May | 13 | 3.7 |
| June | 12 | 4.1 |
| July | 11 | 3.4 |
| August | 9 | 3.6 |
| September | 9 | 3.8 |
| October | 11 | 5.3 |
| November | 11 | 4.3 |
| December | 12 | 4.5 |
Cities with about as many rainy days
- Asheville, North Carolina: about 130 wet days a year
- Hartford, Connecticut: about 130 wet days a year
- Concord, New Hampshire: about 133 wet days a year
Source: NOAA daily precipitation records for the Portland area, 1991 to 2020 (at least 30 complete years behind every month), via the Applied Climate Information System. A wet day here means at least a hundredth of an inch of rain or melted snow.