Cool
Average highs are around 12°C, so pack for cooler days.
April verdict
Poor for holiday weather
Average highs are around 12°C, so pack for cooler days. Sunshine averages 5.7h per day, enough for a balanced month. Rainfall averages 79mm, which is relatively low for holiday planning.

Monthly averages
Temp
12°C
Rain
79mm
Sun
5.7h
Sea
4°C
Weather score
26
Poor
Cool
Average highs are around 12°C, so pack for cooler days.
Drier
Rainfall averages 79mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 4°C, so the water can feel cool.
Map
Compare London, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
April12°C average high
April is close to London'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.
April79mm average rain
April 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.
April5.7 hours average sun
April sits close to London's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
April4°C average sea
April is below London's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 22°C in this stretch, so swimming comfort is at its strongest.
April26 weather score
April scores below London'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.