Waterloo Weather & Climate: Best Time to Visit

In Waterloo, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 24°C (75°F) in July to a chilly 7°C (45°F) in January.

Nighttime temperatures range from 14°C (57°F) in July to 1°C (34°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

On average, Waterloo receives a reasonable amount of rain/snowfall, with an annual precipitation of 836 mm (33 in). The wettest period in Waterloo occurs in December, which receives around 80 mm (3.1 in) of precipitation. During the driest month, April, Waterloo experiences moderate rainfall, totaling 56 mm (2.2 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Waterloo Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Waterloo, summer days are longer and more sunny, with daily sunshine hours peaking at 6.3 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.5 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The city experiences its highest humidity in January, reaching 89%. In May, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The mean wind speed varies between 3 m/s (6 knots) and 4 m/s (8 knots) throughout the year. It is lowest in April, May, June, July, August, September, October and November and highest during January, February, March and December. What does this mean?

The mean monthly wind speed over the year (meters per second)