Oshawa

What is the climate like in Oshawa?

The best time to visit Oshawa is typically June – September, with trip comfort peaking in September (7.1/10). Oshawa is warmest in July, when daily highs average 80°F (27°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically April and the driest is September; the year sees roughly 38 in (961 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in September (7.1/10)
• Warmest monthJuly — average high 80°F (27°C)
• Coolest monthJanuary — average low 17°F (-8°C)
• Wettest monthApril (4.0 in (102 mm))
• Driest monthSeptember (2.5 in (63 mm))
• Annual precipitation38 in (961 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromOshawa Wpcp, 4 km away (1969-2023)