Cool
Average highs are around 14°C, so pack for cooler days.
Weather Guide
Belleville, Ontario, Canada Average Monthly Weather
Weather score37Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 12°C, sunshine averages 5.7h per day, and rainfall totals about 852mm. Sea temperatures average 10°C across the year.
Annual weather
Annual averages
Temp
12°C
Rain
852mm
Annual total
Sun
5.7h
Sea
10°C
Weather score
37
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 72mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.7h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Belleville, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October14°C average high
October is close to Belleville'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
October72mm average rain
October sits near Belleville's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to October and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
October4.7 hours average sun
October is below Belleville's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
October15°C average sea
October is close to Belleville's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
October25 weather score
October scores below Belleville'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.
