Cool
Average highs are around 14°C, so pack for cooler days.
Weather Guide
Hamilton, Ontario, Canada Average Monthly Weather
Weather score36Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 13°C, sunshine averages 5.4h per day, and rainfall totals about 889mm. Sea temperatures average 10°C across the year.
Annual weather
Annual averages
Temp
13°C
Rain
889mm
Annual total
Sun
5.4h
Sea
10°C
Weather score
36
Poor avg
Seasonal climate calendar
Trip feel
Drier
Rainfall averages 70mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.5h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Hamilton, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October14°C average high
October is close to Hamilton'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
October70mm average rain
October sits near Hamilton's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to July and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
October4.5 hours average sun
October is below Hamilton'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
October13°C average sea
October is close to Hamilton's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
October25 weather score
October scores below Hamilton'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.
