Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Weather Guide
Boston, Massachusetts, United States Average Monthly Weather
Weather score40Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 15°C, sunshine averages 6.9h per day, and rainfall totals about 1086mm. Sea temperatures average 11°C across the year.
Annual weather
Annual averages
Temp
15°C
Rain
1086mm
Annual total
Sun
6.9h
Sea
11°C
Weather score
40
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 75mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.4h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 19°C, so the water can feel cool.
Map
Weather map
Compare Boston, Massachusetts, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July28°C average high
July is one of Boston'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
July75mm average rain
July is one of Boston'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
July9.4 hours average sun
July is one of Boston's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July19°C average sea
July is one of Boston's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 19°C in this stretch, so swimming comfort is at its strongest.
Weather score
July72 weather score
July is one of Boston'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 Boston, Massachusetts, United States
Marriott
View all
The Ritz-Carlton, BostonBoston, Massachusetts, USA
The Liberty, a Luxury Collection Hotel, BostonBoston, Massachusetts, USA
W BostonBoston, Massachusetts, USA
Boston Marriott Copley PlaceBoston, Massachusetts, USA
Boston Marriott Long WharfBoston, Massachusetts, USA
Renaissance Boston Seaport DistrictBoston, Massachusetts, USA