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September Weather in North Bay, Canada

Last updated: June 18, 2025

The average temperature in North Bay, Canada during September is a pleasant 14°C (58°F). Expect temperatures to range from a minimum of 4°C (39°F) to a maximum of 29°C (84°F). Be prepared for precipitation of about 113 mm (4.5 in) over approximately 12 days, and note that the average humidity typically hovers around 76%.

September Temperature in North Bay

In September in North Bay, the average temperature is 14°C (58°F), with maximums reaching 29°C (84°F) and minimums dropping as low as 4°C (39°F). This makes it a great time to explore North Bay, as you can enjoy mild days and cool evenings.

September Weather in North Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in North Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In North Bay, September typically has an average temperature of 14°C (58°F), with highs reaching up to 29°C (84°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec151624375263696658473121
Data source: Temperature data for North Bay 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 North Bay

In North Bay in September, the precipitation amount is 113 mm (4.5 in) over the course of 12 days.

September Precipitation Trends in North Bay

The chart displays monthly precipitation patterns in North Bay, 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 North Bay, September typically receives around 113 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5566569694122971051131228878
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in North Bay

In North Bay in September humidity is 76%. With an average temperature of 14°C (58°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor activities feel sticky and draining, and prompting travelers to seek shade and stay hydrated often.

September Average Humidity in North Bay

This chart illustrates the average monthly humidity levels in North Bay, 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 North Bay is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%95%89%85%74%67%71%71%76%86%90%94%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in North Bay

In North Bay 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 North Bay.

Maximum UV Index Levels in North Bay for September

The chart shows the monthly maximum UV Index (UVI) for North Bay 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 North Bay typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799987532
Data source: North Bay 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 North Bay Compares to Other Months

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

This table compares monthly weather conditions in North Bay, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)55 mm (2.1 inches)96%low
February Weather-9°C (16°F)66 mm (2.6 inches)95%moderate
March Weather-4°C (25°F)56 mm (2.2 inches)89%moderate
April Weather3°C (37°F)96 mm (3.8 inches)85%high
May Weather11°C (53°F)94 mm (3.7 inches)74%very high
June Weather17°C (63°F)122 mm (4.8 inches)67%very high
July Weather20°C (69°F)97 mm (3.8 inches)71%very high
August Weather19°C (66°F)105 mm (4.1 inches)71%very high
September Weather14°C (58°F)113 mm (4.5 inches)76%high
October Weather8°C (47°F)122 mm (4.8 inches)86%moderate
November Weather0°C (32°F)88 mm (3.5 inches)90%moderate
December Weather-6°C (21°F)78 mm (3.1 inches)94%low

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