Mild
Average highs are around 26°C, so days are mild rather than hot.
Weather Guide
Oshawa, Ontario, Canada Average Monthly Weather
Weather score35Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 12°C, sunshine averages 5.4h per day, and rainfall totals about 861mm. Sea temperatures average 10°C across the year.
Annual weather
Annual averages
Temp
12°C
Rain
861mm
Annual total
Sun
5.4h
Sea
10°C
Weather score
35
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 66mm, 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 19°C, so the water can feel cool.
Map
Weather map
Compare Oshawa, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July26°C average high
July is one of Oshawa'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
July66mm average rain
July sits near Oshawa's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to July, October, and 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 Oshawa's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July19°C average sea
July is one of Oshawa'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
July66 weather score
July is one of Oshawa'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.
