Smiths Falls (ON) Weather & Climate: Best Time to Visit

Monthly Temperature in Smiths Falls

The climate in Smiths Falls is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -3°C (27°F) in January.

Nighttime temperatures range from 16°C (61°F) in July to -13°C (9°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Smiths Falls

Smiths Falls has a notably wet climate with abundant precipitation, recording 1030 mm (41 in) of rain/snowfall per year. The wettest period in Smiths Falls occurs in April, which receives around 99 mm (3.9 in) of precipitation. During the driest month, February, Smiths Falls experiences moderate snowfall, totaling 67 mm (2.6 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Smiths Falls Precipitation page.

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

The average number of days each month with precipitation

Sunshine Hours in Smiths Falls

In Smiths Falls, summer days are longer and more sunny, with daily sunshine hours peaking at 9.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.8 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

Humidity in Smiths Falls by Month

The relative humidity is moderate throughout the year in Smiths Falls.

The city experiences its highest humidity in December, reaching 72%. In May, the humidity drops to its lowest level at 49%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year