September Weather in St. Clements, Canada

Last updated: June 18, 2025

In September, the average temperature in St. Clements, Canada hovers around 16°C (61°F). Expect a range of temperatures, with lows plummeting to -1°C (31°F) and highs reaching up to 31°C (88°F). Be prepared for a precipitation amount of 83 mm (3.3 in) spread over 11 days, contributing to an average humidity of 81%.

September Temperature in St. Clements

In September in St. Clements, the average temperature is 16°C (61°F), with maximums reaching 31°C (88°F) and minimums dropping as low as -1°C (31°F). It's a great time for travelers to enjoy a mix of warm days and cool nights while exploring the beauty of St. Clements.

September Weather in St. Clements: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in St. Clements, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Clements, September typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (88°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in St. Clements

In St. Clements in September, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

September Precipitation Trends in St. Clements

The chart displays monthly precipitation patterns in St. Clements, 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 St. Clements, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in St. Clements

In St. Clements in September, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

September Average Humidity in St. Clements

This chart illustrates the average monthly humidity levels in St. Clements, 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 St. Clements 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 St. Clements

In St. Clements 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 St. Clements.

Maximum UV Index Levels in St. Clements for September

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

Data source: St. Clements 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 St. Clements Compares to Other Months

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

This table compares monthly weather conditions in St. Clements, 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)	77 mm (3.0 inches)	90%	low
February Weather	-5°C (23°F)	81 mm (3.2 inches)	90%	moderate
March Weather	0°C (31°F)	70 mm (2.8 inches)	87%	moderate
April Weather	5°C (42°F)	101 mm (4.0 inches)	87%	very high
May Weather	13°C (55°F)	98 mm (3.9 inches)	82%	very high
June Weather	18°C (65°F)	108 mm (4.2 inches)	81%	very high
July Weather	21°C (70°F)	79 mm (3.1 inches)	79%	very high
August Weather	20°C (68°F)	102 mm (4.0 inches)	80%	very high
September Weather	16°C (61°F)	83 mm (3.3 inches)	81%	high
October Weather	10°C (50°F)	111 mm (4.4 inches)	84%	moderate
November Weather	2°C (36°F)	89 mm (3.5 inches)	88%	moderate
December Weather	-2°C (29°F)	77 mm (3.0 inches)	87%	low