Waterloo

What is the climate like in Waterloo?

The best time to visit Waterloo is typically August – September, with trip comfort peaking in August (6.6/10). Waterloo is warmest in July, when daily highs average 83°F (28°C), and coolest in January, when lows fall to about 14°F (-10°C). The wettest month is typically May and the driest is February; the year sees roughly 41 in (1036 mm) of precipitation.

• Best time to visitAugust – September — comfort peaks in August (6.6/10)
• Warmest monthJuly — average high 83°F (28°C)
• Coolest monthJanuary — average low 14°F (-10°C)
• Wettest monthMay (5.6 in (143 mm))
• Driest monthFebruary (1.5 in (39 mm))
• Annual precipitation41 in (1036 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromWaterloo Muni AP, 8 km away (1950-2026)