Mild
Average highs are around 24°C, so days are mild rather than hot.
Weather Guide
Gravenhurst, Ontario, Canada Average Monthly Weather
Weather score31Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 11°C, sunshine averages 5.4h per day, and rainfall totals about 1097mm. Sea temperatures average 9°C across the year.
Annual weather
Annual averages
Temp
11°C
Rain
1097mm
Annual total
Sun
5.4h
Sea
9°C
Weather score
31
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 97mm, so some wet days are possible.
Some sun
Sunshine averages 7.8h per day, enough for a balanced month.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Weather map
Compare Gravenhurst, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August24°C average high
August is one of Gravenhurst'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
August97mm average rain
August sits near Gravenhurst's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsFebruary to August and October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August7.8 hours average sun
August is brighter than Gravenhurst'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
August21°C average sea
August is one of Gravenhurst'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
August55 weather score
August scores above Gravenhurst's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
