Portland, ME 14-Day Forecast
Maine, United States 🇺🇸
The 14-day forecast for Portland is temporarily unavailable - please check back shortly. Meanwhile, the monthly averages below give a reliable picture of what to expect.
Portland 14-day outlook: the story
Aim for May to October if you get the choice: these are the warmest and brightest weeks of the year, and highs average 70°F (21°C) against roughly 10 wet days a month. For the same question asked the other way round, see where else is warm in May.
For typical conditions month by month, see the Portland climate & average temperatures guide.
Average temperatures in Portland by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 33° | 19° | 10 | 4.1 in | 5.9 h/day | 9.3 h | 32% | 68% |
| February | 35° | 18° | 9 | 3.2 in | 6.9 h/day | 10.4 h | 33% | 69% |
| March | 42° | 26° | 11 | 3.8 in | 8.0 h/day | 11.8 h | 35% | 67% |
| April | 51° | 36° | 11 | 4.5 in | 8.2 h/day | 13.4 h | 38% | 70% |
| May | 63° | 47° | 9 | 2.7 in | 10.1 h/day | 14.7 h | 28% | 72% |
| June | 72° | 57° | 11 | 3.8 in | 11.1 h/day | 15.4 h | 37% | 76% |
| July | 78° | 64° | 10 | 3.8 in | 11.3 h/day | 15.1 h | 33% | 77% |
| August | 77° | 63° | 11 | 3.6 in | 10.8 h/day | 14.0 h | 35% | 78% |
| September | 71° | 57° | 8 | 3.4 in | 9.4 h/day | 12.4 h | 28% | 78% |
| October | 60° | 47° | 9 | 4.5 in | 7.1 h/day | 10.9 h | 30% | 77% |
| November | 47° | 35° | 9 | 3.8 in | 6.5 h/day | 9.6 h | 30% | 71% |
| December | 38° | 26° | 11 | 5.0 in | 5.7 h/day | 8.9 h | 35% | 72% |
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