Mild
Average highs are around 23°C, so days are mild rather than hot.
Weather Guide
Sudbury, Ontario, Canada Average Monthly Weather
Weather score33Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 9°C, sunshine averages 5.2h per day, and rainfall totals about 820mm. Sea temperatures average 9°C across the year.
Annual weather
Annual averages
Temp
9°C
Rain
820mm
Annual total
Sun
5.2h
Sea
9°C
Weather score
33
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 84mm, so some wet days are possible.
Some sun
Sunshine averages 7.6h per day, enough for a balanced month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Weather map
Compare Sudbury, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August23°C average high
August is one of Sudbury's warmest months, with daytime heat above the yearly average.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
August84mm average rain
August is wetter than Sudbury's yearly average, so flexible plans matter more.
Driest monthsJanuary to July and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August7.6 hours average sun
August is brighter than Sudbury's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August20°C average sea
August is one of Sudbury's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
August54 weather score
August scores above Sudbury'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.
