Ottawa

What is the climate like in Ottawa?

The best time to visit Ottawa is typically June – October, with trip comfort peaking in September (7.4/10). Ottawa is warmest in July, when daily highs average 90°F (32°C), and coolest in January, when lows fall to about 25°F (-4°C). The wettest month is typically May and the driest is February; the year sees roughly 40 in (1028 mm) of precipitation.

• Best time to visitJune – October — comfort peaks in September (7.4/10)
• Warmest monthJuly — average high 90°F (32°C)
• Coolest monthJanuary — average low 25°F (-4°C)
• Wettest monthMay (6.9 in (176 mm))
• Driest monthFebruary (1.4 in (37 mm))
• Annual precipitation40 in (1028 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromOttawa, 1 km away (1895-2026)