Warm
Average highs sit around 27°C, giving warm days by monthly-average standards.
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
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 74mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.1h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 20°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
July27°C average high
July is one of Hamilton'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
July74mm average rain
July 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
July9.1 hours average sun
July is one of Hamilton's 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
July20°C average sea
July is one of Hamilton's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
July70 weather score
July is one of Hamilton's 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.
