Typical Weather

Weather in St. Catharines in May

How warm is it in St. Catharines in May?

In May the typical daytime high in St. Catharines is 18.8 °C on average, from 15.1 °C at the start to 22.2 °C at the end of the month.

That is 6.8 °C warmer than in April and 5.8 °C cooler than in June.

The last 10 years were 2.2 °C warmer than more than 40 years ago.

Click a day for more: afternoon and night, the usual range, records and how fast it is warming.

Measured at the weather station Toronto, 57 km away.