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September Weather in Windsor, Canada

Last updated: June 18, 2025

In Windsor, Canada, the average temperature in September hovers around 16°C (61°F), with a minimum dipping to 0°C (33°F) and a maximum soaring to 29°C (84°F). During this month, expect about 95 mm (3.7 in) of precipitation spread over 8 days, accompanied by an average humidity of 83%.

September Temperature in Windsor

In September in Windsor, the average temperature is 16°C (61°F). The maximum can reach 29°C (84°F), and the minimum can be as low as 0°C (33°F). This range makes it a great time to explore, so pack for both warm and cooler days!

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

The chart illustrates September temperature patterns in Windsor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Windsor, September typically has an average temperature of 16°C (61°F), with highs reaching up to 29°C (84°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec252530415060676860503930
Data source: Temperature data for Windsor 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 Windsor

In Windsor in September, the total precipitation amount is 95 mm (3.7 in) spread over 8 days.

September Precipitation Trends in Windsor

The chart displays monthly precipitation patterns in Windsor, 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 Windsor, September typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8510590105999987809583140108
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Windsor

In Windsor in September, humidity is 83%. With an average temperature of 16°C (61°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit sticky and potentially uncomfortable as you navigate through the sights.

September Average Humidity in Windsor

This chart illustrates the average monthly humidity levels in Windsor, 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 Windsor is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%82%82%82%84%86%85%83%83%85%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Windsor

In Windsor 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 Windsor.

Maximum UV Index Levels in Windsor for September

The chart shows the monthly maximum UV Index (UVI) for Windsor 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 Windsor typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Windsor 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 Windsor Compares to Other Months

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

This table compares monthly weather conditions in Windsor, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)84 mm (3.3 inches)82%low
February Weather-4°C (26°F)105 mm (4.1 inches)83%moderate
March Weather-1°C (31°F)90 mm (3.5 inches)82%moderate
April Weather5°C (42°F)105 mm (4.1 inches)82%high
May Weather10°C (50°F)99 mm (3.9 inches)82%very high
June Weather16°C (61°F)99 mm (3.9 inches)84%very high
July Weather19°C (67°F)87 mm (3.4 inches)86%very high
August Weather20°C (68°F)80 mm (3.1 inches)85%very high
September Weather16°C (61°F)95 mm (3.7 inches)83%high
October Weather10°C (50°F)83 mm (3.3 inches)83%moderate
November Weather4°C (39°F)140 mm (5.5 inches)85%moderate
December Weather-1°C (30°F)108 mm (4.3 inches)83%low

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