Warm
Average highs sit around 26°C, giving warm days by monthly-average standards.
Weather Guide
London, Ontario, Canada Average Monthly Weather
Weather score34Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 12°C, sunshine averages 5.1h per day, and rainfall totals about 963mm. Sea temperatures average 11°C across the year.
Annual weather
Annual averages
Temp
12°C
Rain
963mm
Annual total
Sun
5.1h
Sea
11°C
Weather score
34
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 78mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.7h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 22°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare London, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July26°C average high
July is one of London'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
July78mm average rain
July sits near London's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to July and September to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July8.7 hours average sun
July is one of London'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
July22°C average sea
July is one of London's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 22°C in this stretch, so swimming comfort is at its strongest.
Weather score
July68 weather score
July is one of London'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.
