Cool
Average highs are around 18°C, so pack for cooler days.
May verdict
Ottawa, Ontario, Canada in May
Weather score43Mixed
Mixed for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 7.3h per day, enough for a balanced month. Rainfall averages 73mm, which is relatively low for holiday planning.
May weather
Monthly averages
Temp
18°C
Rain
73mm
Sun
7.3h
Weather score
43
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 73mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.3h per day, enough for a balanced month.
Map
Weather map
Compare Ottawa, Ontario, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May18°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
May73mm average rain
May sits near Ottawa's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
May7.3 hours average sun
May is brighter than Ottawa's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
May43 weather score
May sits close to Ottawa's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
