Portland, ME Weather
Portland hourly forecast: next 24 hours
Today's high of 78°F (26°C) is right in line with the typical August high of 77°F (25°C).
Current conditions in detail
Portland weather tomorrow (Friday, August 14)
Tomorrow in Portland looks sunny, with a high of 77° and an overnight low of 60°. Rain is unlikely (3% chance). Winds top out near 14 mph, and the UV index reaches 6 (high).
Portland 14-day forecast
About the weather in Portland
Located in Maine, United States, Portland experiences a humid continental climate with warm summers and cold, often snowy winters. Afternoon temperatures peak near 78°F (26°C) in July and dip to about 33°F (1°C) in January, with around 46.3 inches (1175 mm) of precipitation falling across the year.
Portland weather: quick facts
- Hottest month: July - highs near 78°F (26°C)
- Coldest month: January - highs near 33°F (1°C)
- Record high: 97°F (36°C) · Record low: -19°F (-28°C) (2015–2024)
- Wettest month: December (11 rainy days) · Sunniest: July (11.3 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 24 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 78°F (26°C) and overnight lows stay near 64°F (18°C). The coolest month is January, with typical highs of 33°F (1°C) and lows around 19°F (-7°C). Based on 2015–2024 weather data, temperatures have reached as high as 97°F (36°C) and dropped as low as -19°F (-28°C).
Rain, sun and snow
December is usually the wettest month. It brings about 5.0 inches (128 mm) of rain over 11 days, while May is the driest. July brings the most sunshine, averaging 11.3 hours of sun a day. Snow falls on about 24 days in a typical year, mostly from November through April.
Season by season
Spring (March through May)
Spring in Portland is brisk and cold, with daytime highs averaging 52°F (11°C) and nights around 37°F (3°C); expect showers on roughly 31 days across the season, plus around 6 snowy days.
Summer (June through August)
Summer in Portland brings comfortable warmth, with daytime highs averaging 76°F (24°C) and nights around 61°F (16°C); expect showers on roughly 32 days across the season.
Fall (September through November)
Fall in Portland is mild, with daytime highs averaging 59°F (15°C) and nights around 46°F (8°C); expect showers on roughly 27 days across the season.
Winter (December through February)
Winter in Portland brings deep cold, with daytime highs averaging 36°F (2°C) and nights around 21°F (-6°C); expect showers on roughly 30 days across the season, plus around 16 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Average temperatures in Portland by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 33° | 19° | 10 | 4.1 in | 5.9 h/day | 68% |
| February | 35° | 18° | 9 | 3.2 in | 6.9 h/day | 69% |
| March | 42° | 26° | 11 | 3.8 in | 8.0 h/day | 67% |
| April | 51° | 36° | 11 | 4.5 in | 8.2 h/day | 70% |
| May | 63° | 47° | 9 | 2.7 in | 10.1 h/day | 72% |
| June | 72° | 57° | 11 | 3.8 in | 11.1 h/day | 76% |
| July | 78° | 64° | 10 | 3.8 in | 11.3 h/day | 77% |
| August | 77° | 63° | 11 | 3.6 in | 10.8 h/day | 78% |
| September | 71° | 57° | 8 | 3.4 in | 9.4 h/day | 78% |
| October | 60° | 47° | 9 | 4.5 in | 7.1 h/day | 77% |
| November | 47° | 35° | 9 | 3.8 in | 6.5 h/day | 71% |
| December | 38° | 26° | 11 | 5.0 in | 5.7 h/day | 72% |