Saint Catharines Weather in May

May in Saint Catharines sees daytime temperatures around 17°C (63°F) and lows of 10°C (50°F) at night. With around 90 mm (3.5 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Saint Catharines in May

Typically around 11 days of rainfall are expected, averaging 90 mm (3.5 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Saint Catharines in May

May in Saint Catharines sees highs of 17°C (63°F) and lows of 10°C (50°F) overnight. Conditions are often most pleasant around the middle of the day. Nights drop to around 10°C (50°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Saint Catharines in May

Enjoy a sunny month with about 259 hours of sunshine, the clear skies make Saint Catharines even more beautiful.

Should you favor a climate that's both dry and comfortably warm, July, August and September typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.