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September Weather in Rosemere, Canada

Last updated: June 18, 2025

In September, the average temperature in Rosemere, Canada hovers around 16°C (61°F), offering a pleasant climate for outdoor activities. Expect a minimum chill of 1°C (33°F) and a maximum warmth of 31°C (89°F). With an average precipitation of 75 mm (3.0 in) spread over 9 days, it’s wise to be prepared for some rain. Moreover, the average humidity level is a comfortable 78%, creating a refreshing atmosphere for visitors.

September Temperature in Rosemere

In September in Rosemere, the average temperature is 16°C (61°F). Maximums can reach 31°C (89°F), while minimums can drop to as low as 1°C (33°F). This diverse temperature range makes Rosemere an ideal destination for travelers seeking both warmth and cooler experiences during their visit.

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

The chart illustrates September temperature patterns in Rosemere, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosemere, September typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (89°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec161828425665716960483321
Data source: Temperature data for Rosemere 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 Rosemere

In Rosemere in September, the precipitation amount is 75 mm (3.0 in) distributed over 9 days.

September Precipitation Trends in Rosemere

The chart displays monthly precipitation patterns in Rosemere, 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 Rosemere, September typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8486871221001011011027512911392
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rosemere

In Rosemere in September, humidity is 78%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as it clings to your skin and creates a heavy atmosphere that can drain your energy.

September Average Humidity in Rosemere

This chart illustrates the average monthly humidity levels in Rosemere, 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 Rosemere is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rosemere

In Rosemere 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 Rosemere.

Maximum UV Index Levels in Rosemere for September

The chart shows the monthly maximum UV Index (UVI) for Rosemere 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 Rosemere typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Rosemere 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 Rosemere Compares to Other Months

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

This table compares monthly weather conditions in Rosemere, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)84 mm (3.3 inches)93%low
February Weather-8°C (19°F)86 mm (3.4 inches)92%moderate
March Weather-2°C (28°F)87 mm (3.4 inches)86%moderate
April Weather5°C (42°F)122 mm (4.8 inches)85%high
May Weather13°C (56°F)100 mm (3.9 inches)80%very high
June Weather18°C (65°F)101 mm (4.0 inches)74%very high
July Weather22°C (71°F)101 mm (4.0 inches)76%very high
August Weather20°C (69°F)102 mm (4.0 inches)75%very high
September Weather16°C (61°F)75 mm (3.0 inches)78%high
October Weather9°C (49°F)129 mm (5.1 inches)86%moderate
November Weather1°C (33°F)113 mm (4.5 inches)88%moderate
December Weather-6°C (22°F)92 mm (3.6 inches)89%low

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