Waterloo

What is the climate like in Waterloo?

The best time to visit Waterloo is typically September, the year's most comfortable month (6.9/10). Waterloo is warmest in July, when daily highs average 82°F (28°C), and coolest in January, when lows fall to about 22°F (-5°C). The wettest month is typically October and the driest is September; the year sees roughly 48 in (1217 mm) of precipitation.

• Best time to visitSeptember — the year's comfort peak (6.9/10)
• Warmest monthJuly — average high 82°F (28°C)
• Coolest monthJanuary — average low 22°F (-5°C)
• Wettest monthOctober (5.0 in (126 mm))
• Driest monthSeptember (3.1 in (78 mm))
• Annual precipitation48 in (1217 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromGeneva Rsch Farm, 14 km away (1969-2026)