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September Weather in Brantford, Canada

Last updated: June 18, 2025

In September, the average temperature in Brantford, Canada hovers around 17°C (63°F). Expect a range of temperatures, with minimums dipping to 1°C (34°F) and maxing out at 32°C (90°F). The weather is also characterized by 71 mm (2.8 in) of precipitation spread over 10 days, while the air maintains an average humidity level of 81%. Be prepared for a mix of weather conditions!

September Temperature in Brantford

In September in Brantford, the average temperature is 17°C (63°F). Maximums can reach 32°C (90°F), while minimums can drop as low as 1°C (34°F). Be prepared for a range of temperatures during your travels.

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

The chart illustrates September temperature patterns in Brantford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brantford, September typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (90°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec242533435666727063523730
Data source: Temperature data for Brantford 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 Brantford

In Brantford in September, the precipitation amount is 71 mm (2.8 in) over a duration of 10 days.

September Precipitation Trends in Brantford

The chart displays monthly precipitation patterns in Brantford, 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 Brantford, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec70746598971038290711007571
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Brantford

In Brantford in September humidity is 81%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket enveloping you, making travel slightly oppressive and calling for frequent breaks in air-conditioned spaces to recharge and enjoy your journey comfortably.

September Average Humidity in Brantford

This chart illustrates the average monthly humidity levels in Brantford, 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 Brantford is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%88%87%83%81%79%80%81%84%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brantford

In Brantford 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 Brantford.

Maximum UV Index Levels in Brantford for September

The chart shows the monthly maximum UV Index (UVI) for Brantford 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 Brantford typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997542
Data source: Brantford 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 Brantford Compares to Other Months

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

This table compares monthly weather conditions in Brantford, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)70 mm (2.7 inches)90%low
February Weather-4°C (26°F)74 mm (2.9 inches)90%moderate
March Weather1°C (33°F)65 mm (2.6 inches)87%moderate
April Weather6°C (44°F)98 mm (3.9 inches)87%very high
May Weather14°C (57°F)97 mm (3.8 inches)82%very high
June Weather19°C (67°F)103 mm (4.1 inches)81%very high
July Weather22°C (72°F)82 mm (3.2 inches)79%very high
August Weather21°C (70°F)90 mm (3.5 inches)80%very high
September Weather17°C (63°F)71 mm (2.8 inches)81%high
October Weather11°C (52°F)100 mm (3.9 inches)84%moderate
November Weather3°C (38°F)75 mm (3.0 inches)88%moderate
December Weather-1°C (30°F)70 mm (2.8 inches)87%low

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