Mild
Average highs are around 20°C, so days are mild rather than hot.
September verdict
Bar Harbor, United States in September
Weather score38Poor
Poor for holiday weather
Average highs are around 20°C, so days are mild rather than hot. Sunshine averages 6.2h per day, enough for a balanced month. Rainfall averages 112mm, so some wet days are possible.
September weather
Monthly averages
Temp
20°C
Rain
112mm
Sun
6.2h
Sea
13°C
Weather score
38
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 112mm, so some wet days are possible.
Some sun
Sunshine averages 6.2h per day, enough for a balanced month.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Bar Harbor, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September20°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September112mm average rain
September sits near Bar Harbor's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsFebruary and June to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September6.2 hours average sun
September is brighter than Bar Harbor's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September13°C average sea
September is one of Bar Harbor's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 11°C in this stretch, so swimming comfort is at its strongest.
Weather score
September38 weather score
September sits close to Bar Harbor's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
