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September Weather in Fort Frances, Canada

Last updated: June 18, 2025

In September, the average temperature in Fort Frances, Canada is a mild 14°C (57°F). However, temperatures can vary significantly, with a minimum of -3°C (27°F) and a maximum soaring to 30°C (86°F). Expect an average precipitation of 138 mm (5.4 in) over about 14 days, accompanied by a notable humidity level of 75%, creating a unique and dynamic climate experience!

September Temperature in Fort Frances

In September in Fort Frances, the average temperature is 14°C (57°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as -3°C (27°F). Be prepared for a wide range of temperatures when traveling to Fort Frances during this month.

September Weather in Fort Frances: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fort Frances, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Frances, September typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec8826375465696657432614
Data source: Temperature data for Fort Frances 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 Fort Frances

In Fort Frances in September, the total precipitation amount is 138 mm (5.4 in) over a span of 14 days.

September Precipitation Trends in Fort Frances

The chart displays monthly precipitation patterns in Fort Frances, 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 Fort Frances, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec2428264949847570138933843
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fort Frances

In Fort Frances in September, humidity is 75%. With an average temperature of 14°C (57°F), this humidity feels like a damp blanket enveloping you, making outdoor activities somewhat uncomfortable and travel a bit sluggish, as the air feels heavy and the heat lingers close to your skin.

September Average Humidity in Fort Frances

This chart illustrates the average monthly humidity levels in Fort Frances, 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 Fort Frances is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%95%92%85%75%71%70%72%75%82%90%96%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fort Frances

In Fort Frances 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 Fort Frances.

Maximum UV Index Levels in Fort Frances for September

The chart shows the monthly maximum UV Index (UVI) for Fort Frances 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 Fort Frances typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987421
Data source: Fort Frances 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 Fort Frances Compares to Other Months

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

This table compares monthly weather conditions in Fort Frances, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (8°F)24 mm (0.9 inches)96%low
February Weather-14°C (8°F)27 mm (1.1 inches)95%moderate
March Weather-3°C (26°F)26 mm (1.0 inches)92%moderate
April Weather3°C (38°F)49 mm (1.9 inches)85%high
May Weather12°C (54°F)49 mm (1.9 inches)75%very high
June Weather18°C (65°F)84 mm (3.3 inches)71%very high
July Weather21°C (70°F)75 mm (3.0 inches)70%very high
August Weather19°C (66°F)70 mm (2.7 inches)72%very high
September Weather14°C (57°F)138 mm (5.4 inches)75%high
October Weather6°C (43°F)93 mm (3.6 inches)82%moderate
November Weather-3°C (26°F)38 mm (1.5 inches)90%low
December Weather-10°C (15°F)43 mm (1.7 inches)96%low

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