Cool
Average highs are around 18°C, so pack for cooler days.
September verdict
Saint John, New Brunswick, Canada in September
Weather score34Poor
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 5.7h per day, enough for a balanced month. Rainfall averages 104mm, so some wet days are possible.
September weather
Monthly averages
Temp
18°C
Rain
104mm
Sun
5.7h
Sea
13°C
Weather score
34
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 104mm, so some wet days are possible.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Saint John, New Brunswick, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September18°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
September104mm average rain
September sits on the drier side of Saint John's year, which helps with sightseeing and transfers.
Driest monthsFebruary to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.7 hours average sun
September sits close to Saint John's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September13°C average sea
September is one of Saint John's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 13°C in this stretch, so swimming comfort is at its strongest.
Weather score
September34 weather score
September sits close to Saint John's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
