Waterloo climate

Typical historical weather for Waterloo, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Waterloo.

Annual average

9.8°C

across all months

Warmest month

28.1°C

Jul average high

Coolest month

-10.5°C

Jan average low

Annual rainfall

1036mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

38.2°C

23 August 2023

Coldest day

-33.9°C

31 January 2019

Wettest day

84.7mm

30 July 2025

Windiest day

15.5m/s

24 February 2019