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September Weather in Vermilion, Canada

Last updated: June 18, 2025

In September, the average temperature in Vermilion, Canada hovers around 10°C (51°F), with a wide temperature range from a chilly -3°C (26°F) to a warm 30°C (87°F). Expect about 35 mm (1.4 in) of precipitation over the course of 8 days, contributing to an average humidity of 73%. Stay prepared for both the cool and warm spells!

September Temperature in Vermilion

In September in Vermilion, the average temperature is 10°C (51°F), with maximums reaching 30°C (87°F) and minimums dipping as low as -3°C (26°F). Be sure to pack layers to prepare for a wide range of temperatures during your travels.

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

The chart illustrates September temperature patterns in Vermilion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vermilion, September typically has an average temperature of 10°C (51°F), with highs reaching up to 30°C (87°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec9520345260636151362113
Data source: Temperature data for Vermilion 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 Vermilion

In Vermilion in September, the precipitation amount is 35 mm (1.4 in) over the course of 8 days.

September Precipitation Trends in Vermilion

The chart displays monthly precipitation patterns in Vermilion, 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 Vermilion, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1616232656109895935282916
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Vermilion

In Vermilion in September, humidity is 73%. With an average temperature of 10°C (51°F), this humidity feels like a chilly dampness that can make outdoor activities uncomfortable, causing your clothes to cling to your skin and a persistent coolness that seeps into your bones, which might deter long excursions without proper layering.

September Average Humidity in Vermilion

This chart illustrates the average monthly humidity levels in Vermilion, 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 Vermilion is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%92%88%80%73%71%80%78%73%78%82%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Vermilion

In Vermilion 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 Vermilion, you can refer to this Hourly UV Index in Vermilion.

Maximum UV Index Levels in Vermilion for September

The chart shows the monthly maximum UV Index (UVI) for Vermilion 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 Vermilion typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235678876421
Data source: Vermilion 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 Vermilion Compares to Other Months

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

This table compares monthly weather conditions in Vermilion, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (9°F)16 mm (0.6 inches)89%low
February Weather-15°C (5°F)16 mm (0.6 inches)92%moderate
March Weather-6°C (21°F)23 mm (0.9 inches)88%moderate
April Weather1°C (34°F)26 mm (1.0 inches)80%high
May Weather11°C (52°F)56 mm (2.2 inches)73%high
June Weather15°C (60°F)108 mm (4.3 inches)71%very high
July Weather17°C (63°F)89 mm (3.5 inches)80%very high
August Weather16°C (61°F)59 mm (2.3 inches)78%high
September Weather10°C (51°F)35 mm (1.4 inches)73%high
October Weather2°C (37°F)28 mm (1.1 inches)78%moderate
November Weather-6°C (22°F)29 mm (1.1 inches)82%low
December Weather-11°C (13°F)16 mm (0.6 inches)92%low

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