Climate almanac
St. Catharines
Ontario, Canada · 43.17°, -79.24°
What is the climate like in St. Catharines?
The best time to visit St. Catharines is typically June – September, with trip comfort peaking in September (7.2/10). St. Catharines is warmest in July, when daily highs average 78°F (25°C), and coolest in January, when lows fall to about 25°F (-4°C). The wettest month is typically April and the driest is September; the year sees roughly 41 in (1031 mm) of precipitation.
- Best time to visitJune – September — comfort peaks in September (7.2/10)
- Warmest monthJuly — average high 78°F (25°C)
- Coolest monthJanuary — average low 25°F (-4°C)
- Wettest monthApril (4.3 in (109 mm))
- Driest monthSeptember (2.5 in (64 mm))
- Annual precipitation41 in (1031 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromRidgeville, 15 km away (1950-2022)