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September Weather in Fermont, Canada

Last updated: June 18, 2025

In September, the average temperature in Fermont, Canada hovers around 8°C (46°F), with a minimum dip of -4°C (25°F) and a maximum rise to 24°C (75°F). Expect 115 mm (4.5 in) of precipitation spread over approximately 18 days, contributing to an average humidity level of 89%. Get ready for a mix of chilly and mild days!

September Temperature in Fermont

In September in Fermont, the average temperature is 8°C (46°F), with maximums reaching 24°C (75°F) and minimums dropping to -4°C (25°F). Be prepared for a wide range of temperatures while traveling, so pack accordingly!

September Weather in Fermont: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fermont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fermont, September typically has an average temperature of 8°C (46°F), with highs reaching up to 24°C (75°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec-5-4823364958564634195
Data source: Temperature data for Fermont 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 Fermont

In Fermont in September, the precipitation amount is 115 mm (4.5 in) occurring over 18 days.

September Precipitation Trends in Fermont

The chart displays monthly precipitation patterns in Fermont, 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 Fermont, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec41395173701121231481161169374
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Fermont

In Fermont in September humidity is 89%. With an average temperature of 8°C (46°F), this humidity feels like a chilly dampness that clings to your skin, making travel uncomfortable and necessitating extra layers to stay warm while you navigate the wet conditions.

September Average Humidity in Fermont

This chart illustrates the average monthly humidity levels in Fermont, 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 Fermont is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%92%89%87%84%85%85%88%89%92%97%99%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fermont

In Fermont in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Fermont, you can refer to this Hourly UV Index in Fermont.

Maximum UV Index Levels in Fermont for September

The chart shows the monthly maximum UV Index (UVI) for Fermont 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 Fermont typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec135898776421
Data source: Fermont 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 Fermont Compares to Other Months

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

This table compares monthly weather conditions in Fermont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-21°C (-5°F)41 mm (1.6 inches)96%low
February Weather-20°C (-4°F)39 mm (1.5 inches)92%moderate
March Weather-13°C (8°F)51 mm (2.0 inches)89%moderate
April Weather-5°C (24°F)73 mm (2.9 inches)87%very high
May Weather2°C (36°F)70 mm (2.8 inches)84%very high
June Weather10°C (49°F)112 mm (4.4 inches)85%very high
July Weather14°C (58°F)122 mm (4.8 inches)85%high
August Weather13°C (57°F)148 mm (5.8 inches)88%high
September Weather8°C (46°F)115 mm (4.5 inches)89%high
October Weather1°C (34°F)115 mm (4.5 inches)92%moderate
November Weather-7°C (19°F)93 mm (3.6 inches)97%low
December Weather-15°C (6°F)74 mm (2.9 inches)99%low

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