Warm
Average highs sit around 26°C, giving warm days by monthly-average standards.
Weather Guide
Portland, Maine, United States Average Monthly Weather
Weather score36Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 13°C, sunshine averages 6.7h per day, and rainfall totals about 1144mm. Sea temperatures average 10°C across the year.
Annual weather
Annual averages
Temp
13°C
Rain
1144mm
Annual total
Sun
6.7h
Sea
10°C
Weather score
36
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 78mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.9h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 17°C, so the water can feel cool.
Map
Weather map
Compare Portland, Maine, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July26°C average high
July is one of Portland's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July78mm average rain
July is one of Portland's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July8.9 hours average sun
July is one of Portland's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July17°C average sea
July is one of Portland's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
July62 weather score
July is one of Portland's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels in Portland, Maine, United States
Marriott
View all
The Ritz-Carlton, PortlandPortland, Oregon, USA
The Nines, a Luxury Collection Hotel, PortlandPortland, Oregon, USA
Portland Marriott Downtown WaterfrontPortland, Oregon, USA
The Bidwell Marriott PortlandPortland, Oregon, USA
The Westin Portland HarborviewPortland, Maine, USA
Sheraton Portland Airport HotelPortland, Oregon, USA