Cool
Average highs are around 12°C, so pack for cooler days.
Weather Guide
Saint John, New Brunswick, Canada Average Monthly Weather
Weather score27Poor annual avg
Best months: August, July, June
Across the year, average daytime temperatures are around 10°C, sunshine averages 5.1h per day, and rainfall totals about 1315mm. Sea temperatures average 8°C across the year.
Annual weather
Annual averages
Temp
10°C
Rain
1315mm
Annual total
Sun
5.1h
Sea
8°C
Weather score
27
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 106mm, so some wet days are possible.
Limited sun
Sunshine averages 4.5h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 12°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
October12°C average high
October is close to Saint John's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
October106mm average rain
October 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
October4.5 hours average sun
October 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
October12°C average sea
October sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to October
Sea temperatures are usually near 13°C in this stretch, so swimming comfort is at its strongest.
Weather score
October22 weather score
October scores below Saint John's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
