Oakville weather in May
Long-run climate averages for Oakville, Ontario in May, plus what the forecast models say for the days ahead.
In May, Oakville averages 18°C by day and 8°C at night. The wettest month is usually July.
May in Oakville averages a daytime high of 18°C and an overnight low of 8°C, which reads as mild for this part of the world. Across the whole year Oakville sees roughly 975 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Oakville forecast with every model compared and how much they currently agree.
Oakville weather by month
what to expect in Oakville through the year, 1991-2020 averagesHere is Oakville's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Oakville by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Oakville, scoring 94/100 on our CheckWeather Score, ahead of the Env. Canada at 86. See the full CA accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Oakville in May?
Is May a good time to visit Oakville?
Does it rain a lot in Oakville in May?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .