Weather without the clutter.
Get the Portland ME weather forecast without ads, cookies, or tracking. Open-Meteo data, 10-day forecast, hourly conditions, and radar — all free. click here to hide this
July is the hottest month in Portland ME, with an average high of 79°F / 26°C; January is the coldest (32°F / 0°C). October is the wettest month, averaging 5.2 in / 133 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 32 / 0 | 15 / -10 | 3.5 / 89 | 9 |
| Feb | 35 / 2 | 17 / -9 | 3.5 / 90 | 8 |
| Mar | 42 / 6 | 25 / -4 | 4.1 / 104 | 9 |
| Apr | 54 / 12 | 35 / 2 | 4.4 / 112 | 9 |
| May | 64 / 18 | 45 / 7 | 3.7 / 93 | 9 |
| Jun | 73 / 23 | 54 / 12 | 4.1 / 105 | 9 |
| Jul | 79 / 26 | 60 / 16 | 3.4 / 87 | 8 |
| Aug | 78 / 26 | 59 / 15 | 3.6 / 91 | 7 |
| Sep | 71 / 22 | 51 / 11 | 3.8 / 96 | 7 |
| Oct | 59 / 15 | 40 / 5 | 5.2 / 133 | 9 |
| Nov | 48 / 9 | 31 / -1 | 4.3 / 108 | 9 |
| Dec | 38 / 3 | 22 / -6 | 4.5 / 114 | 9 |
Extremes since 1940: highest 103°F / 39°C (August 2, 1975), lowest -39°F / -39°C (February 16, 1943).
Daylight lasts about 15.3 hours in June and 8.7 hours in December.
Data: Meteostat — Portland International Jetport, 1991–2020 averages.
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