Ottawa Weather in May

During May, Ottawa experiences high daytime temperatures of 24°C (75°F) and cooler nights around 12°C (54°F). As the wettest month of the year, expect frequent rainfall.

Rainfall in Ottawa in May

Since this month has the highest rainfall, keep an umbrella with you to handle sudden showers. Rain is expected on roughly 14 days, totalling around 138 mm (5.4 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Ottawa in May

In May, Ottawa sees high temperatures, with highs of 24°C (75°F). Nights drop to around 12°C (54°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Ottawa in May

There are approximately 267 hours of sunshine this month, resulting in mostly clear days.

If you prefer enjoying temperate temperatures and rain-free days, October typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.