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September Weather in Smiths Falls, Canada

Last updated: June 18, 2025

In September, the average temperature in Smiths Falls, Canada hovers around 16°C (62°F), with a minimum drop to 1°C (34°F) and a possible maximum of 32°C (89°F). Expect a total precipitation of 57 mm (2.2 in) spread over approximately 10 days, accompanied by an average humidity level of 72%. Stay prepared for varying weather conditions!

September Temperature in Smiths Falls

In September, in Smiths Falls, the average temperature is 16°C (62°F). The maximum can reach 32°C (89°F) and the minimum can be as low as 1°C (34°F). Be sure to pack layers to stay comfortable during your travels.

September Weather in Smiths Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Smiths Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Smiths Falls, September typically has an average temperature of 16°C (62°F), with highs reaching up to 32°C (89°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec182129425564716961503525
Data source: Temperature data for Smiths Falls generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Smiths Falls

In Smiths Falls in September, the precipitation amount is 57 mm (2.2 in) over a span of 10 days.

September Precipitation Trends in Smiths Falls

The chart displays monthly precipitation patterns in Smiths Falls, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Smiths Falls, September typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec7374771161038711391571309177
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Smiths Falls

In Smiths Falls in September, humidity is 72%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapped around you, making it slightly uncomfortable for traveling as you might find yourself sweating more than usual, especially during outdoor activities.

September Average Humidity in Smiths Falls

This chart illustrates the average monthly humidity levels in Smiths Falls, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Smiths Falls is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Smiths Falls

In Smiths Falls in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Smiths Falls.

Maximum UV Index Levels in Smiths Falls for September

The chart shows the monthly maximum UV Index (UVI) for Smiths Falls in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Smiths Falls typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899987532
Data source: Smiths Falls September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Smiths Falls Compares to Other Months

Weather in Smiths Falls varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Smiths Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Smiths Falls, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (19°F)73 mm (2.9 inches)93%low
February Weather-6°C (21°F)74 mm (2.9 inches)93%moderate
March Weather-2°C (29°F)77 mm (3.0 inches)86%moderate
April Weather6°C (43°F)116 mm (4.6 inches)82%very high
May Weather13°C (55°F)103 mm (4.1 inches)75%very high
June Weather18°C (64°F)87 mm (3.4 inches)68%very high
July Weather22°C (71°F)113 mm (4.4 inches)69%very high
August Weather20°C (69°F)91 mm (3.6 inches)67%very high
September Weather16°C (62°F)57 mm (2.2 inches)72%high
October Weather10°C (50°F)130 mm (5.1 inches)83%moderate
November Weather2°C (35°F)91 mm (3.6 inches)88%moderate
December Weather-4°C (25°F)77 mm (3.0 inches)89%low

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