Mild
Average highs are around 25°C, so days are mild rather than hot.
Weather Guide
Blue Mountains, Ontario, Canada Average Monthly Weather
Weather score34Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 11°C, sunshine averages 5.3h per day, and rainfall totals about 927mm. Sea temperatures average 9°C across the year.
Annual weather
Annual averages
Temp
11°C
Rain
927mm
Annual total
Sun
5.3h
Sea
9°C
Weather score
34
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 71mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.5h 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 Blue Mountains, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July25°C average high
July is one of Blue Mountains' warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July71mm average rain
July sits on the drier side of Blue Mountains' year, which helps with sightseeing and transfers.
Driest monthsJanuary to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July9.5 hours average sun
July is one of Blue Mountains' 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 sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 19°C in this stretch, so swimming comfort is at its strongest.
Weather score
July66 weather score
July is one of Blue Mountains' 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.
