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Smiths Falls (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Smiths Falls.
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Climate overview of Smiths Falls
Temperatures in Smiths Falls, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 27°C (81°F), while January is the coldest at -3°C (27°F).
The city has a wet climate, receiving around 1030 mm (41 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. April is the wettest month. Sunshine peaks in July, when the city sees around 9.3 hours of sunshine per day.
Smiths Falls Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Smiths Falls - and find the 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
Data from: Ottawa, Canada (63 KM, 39 Miles).
Daily hours of sunshine
Data from: Ottawa, Canada (63 KM, 39 Miles).
Daily percentage of sunshine
Data from: Ottawa, Canada (63 KM, 39 Miles).
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
Data from: Ottawa, Canada (63 KM, 39 Miles).
Best Time to Visit Smiths Falls
For comfortable weather, consider visiting Smiths Falls in June, July, August and September. Conditions are usually least favourable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
mixed
May
very good
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
cold
Dec
cold
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -13°C (9°F).
Frequently asked questions about the climate in Smiths Falls
What is the best time to visit Smiths Falls?
June, July, August and September typically offer the most optimal weather in Smiths Falls. In contrast, January, February, March, November and December tend to have less optimal conditions. Smiths Falls has warm summers and very cold winters.
What temperatures can I expect in Smiths Falls?
Daytime highs range from -3°C (27°F) in January to 27°C (81°F) in July. Nighttime lows range from -13°C (9°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Smiths Falls get?
Annual rainfall is around 1030 mm (41 in). April is the wettest month with 99 mm (3.9 in), while February is the driest with 67 mm (2.6 in).
How sunny is Smiths Falls?
Smiths Falls receives around 2,087 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 83 hours. Overall, Smiths Falls enjoys abundant sunshine.
Smiths Falls 3-Day Forecast
Smiths Falls on the map
Smiths Falls is highlighted - select any city to see its climate.
Popular in September
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