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September Weather in Deep River, Canada

Last updated: June 18, 2025

In Deep River, Canada, the average temperature in September hovers around 14°C (58°F). Expect a wide range, with minimums dipping to -2°C (29°F) and maximums soaring to 31°C (89°F). This month also sees 94 mm (3.7 in) of precipitation spread over approximately 10 days, contributing to an average humidity level of 74%. Stay prepared for a variety of weather conditions!

September Temperature in Deep River

In September in Deep River, the average temperature is 14°C (58°F). Maximum temperatures can reach 31°C (89°F), while minimums can drop as low as -2°C (29°F). Be prepared for a wide range of temperatures during your travels, so pack accordingly!

September Weather in Deep River: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Deep River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deep River, September typically has an average temperature of 14°C (58°F), with highs reaching up to 31°C (89°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec141625395463706658463119
Data source: Temperature data for Deep River 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 Deep River

In Deep River in September, the precipitation amount is 94 mm (3.7 in) over a duration of 10 days.

September Precipitation Trends in Deep River

The chart displays monthly precipitation patterns in Deep River, 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 Deep River, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec617268105107102102109951048276
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Deep River

In Deep River in September humidity is 74%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or indoor venues more often.

September Average Humidity in Deep River

This chart illustrates the average monthly humidity levels in Deep River, 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 Deep River is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%94%87%82%74%68%67%67%74%83%89%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Deep River

In Deep River 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 Deep River.

Maximum UV Index Levels in Deep River for September

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

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

This table compares monthly weather conditions in Deep River, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)61 mm (2.4 inches)93%low
February Weather-9°C (16°F)72 mm (2.8 inches)94%moderate
March Weather-4°C (25°F)68 mm (2.7 inches)87%moderate
April Weather4°C (39°F)105 mm (4.1 inches)82%high
May Weather12°C (54°F)107 mm (4.2 inches)74%very high
June Weather17°C (64°F)102 mm (4.0 inches)68%very high
July Weather21°C (70°F)102 mm (4.0 inches)67%very high
August Weather19°C (66°F)108 mm (4.3 inches)67%very high
September Weather14°C (58°F)94 mm (3.7 inches)74%high
October Weather8°C (47°F)104 mm (4.1 inches)83%moderate
November Weather-1°C (31°F)82 mm (3.2 inches)89%moderate
December Weather-7°C (20°F)76 mm (3.0 inches)91%low

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