Saint Clair

What is the climate like in Saint Clair?

The best time to visit Saint Clair is typically June – September, with trip comfort peaking in September (7.1/10). Saint Clair is warmest in July, when daily highs average 81°F (27°C), and coolest in January, when lows fall to about 23°F (-5°C). The wettest month is typically April and the driest is November; the year sees roughly 38 in (971 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in September (7.1/10)
• Warmest monthJuly — average high 81°F (27°C)
• Coolest monthJanuary — average low 23°F (-5°C)
• Wettest monthApril (3.8 in (96 mm))
• Driest monthNovember (2.6 in (66 mm))
• Annual precipitation38 in (971 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromPort Huron, 18 km away (1933-2026)