Waterloo

What is the climate like in Waterloo?

The best time to visit Waterloo is typically September – October, with trip comfort peaking in September (7.0/10). Waterloo is warmest in July, when daily highs average 89°F (32°C), and coolest in January, when lows fall to about 27°F (-3°C). The wettest month is typically April and the driest is November; the year sees roughly 46 in (1180 mm) of precipitation.

• Best time to visitSeptember – October — comfort peaks in September (7.0/10)
• Warmest monthJuly — average high 89°F (32°C)
• Coolest monthJanuary — average low 27°F (-3°C)
• Wettest monthApril (5.6 in (142 mm))
• Driest monthNovember (2.6 in (67 mm))
• Annual precipitation46 in (1180 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromFestus, 24 km away (1960-2024)