September Weather in Caledon, Canada

Last updated: June 18, 2025

In September, the average temperature in Caledon, Canada hovers around 16°C (62°F). Temperatures can fluctuate, with lows dipping to 0°C (33°F) and soaring as high as 32°C (90°F). Expect 71 mm (2.8 in) of precipitation over approximately 10 days, contributing to an average humidity level of 81%.

September Temperature in Caledon

In September in Caledon, the average temperature is 16°C (62°F). Maximum temperatures can reach 32°C (90°F), while the minimum can drop as low as 0°C (33°F). Travelers should be prepared for a wide range of weather conditions and pack accordingly.

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

The chart illustrates September temperature patterns in Caledon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caledon, September typically has an average temperature of 16°C (62°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (33°F).

Data source: Temperature data for Caledon generated using information from the Copernicus Climate Change Service.

September Precipitation in Caledon

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

September Precipitation Trends in Caledon

The chart displays monthly precipitation patterns in Caledon, 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 Caledon, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Caledon

In Caledon in September, humidity is 81%. With an average temperature of 16°C (62°F), this humidity feels like a warm embrace that can quickly leave travelers feeling sticky and drained, making outdoor adventures a bit challenging unless they stay properly hydrated and take breaks in the shade.

September Average Humidity in Caledon

This chart illustrates the average monthly humidity levels in Caledon, 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 Caledon is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Caledon

In Caledon 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 Caledon.

Maximum UV Index Levels in Caledon for September

The chart shows the monthly maximum UV Index (UVI) for Caledon 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 Caledon typically reaches 7, which falls under the high exposure category.

Data source: Caledon 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 Caledon Compares to Other Months

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

This table compares monthly weather conditions in Caledon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (22°F)	66 mm (2.6 inches)	90%	low
February Weather	-5°C (24°F)	70 mm (2.8 inches)	90%	moderate
March Weather	0°C (32°F)	59 mm (2.3 inches)	87%	moderate
April Weather	5°C (42°F)	105 mm (4.1 inches)	87%	very high
May Weather	13°C (55°F)	97 mm (3.8 inches)	82%	very high
June Weather	19°C (66°F)	103 mm (4.0 inches)	81%	very high
July Weather	21°C (71°F)	84 mm (3.3 inches)	79%	very high
August Weather	20°C (69°F)	97 mm (3.8 inches)	80%	very high
September Weather	16°C (62°F)	71 mm (2.8 inches)	81%	high
October Weather	10°C (50°F)	101 mm (4.0 inches)	84%	moderate
November Weather	2°C (36°F)	75 mm (3.0 inches)	88%	moderate
December Weather	-2°C (29°F)	70 mm (2.7 inches)	87%	low