September Weather in Trail, Canada

Last updated: June 18, 2025

In Trail, Canada, the average temperature in September hovers around 14°C (57°F), making it a mild time of year. However, temperatures can swing between a chilly -1°C (31°F) and a warm 33°C (91°F). Expect about 56 mm (2.2 in) of precipitation over approximately 8 days, with average humidity levels sitting at 74%. Enjoy the varied climate while planning your activities!

September Temperature in Trail

In September in Trail, the average temperature is 14°C (57°F). Maximums can reach 33°C (91°F), and minimums can drop as low as -1°C (31°F). This wide temperature range makes it essential for travelers to pack accordingly for both warm days and cool nights.

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

The chart illustrates September temperature patterns in Trail, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trail, September typically has an average temperature of 14°C (57°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Trail

In Trail in September, the precipitation amount is 56 mm (2.2 in) over the course of 8 days.

September Precipitation Trends in Trail

The chart displays monthly precipitation patterns in Trail, 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 Trail, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 8 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 Trail

In Trail in September, humidity is 74%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making it slightly uncomfortable for traveling, as you may find yourself quickly sweating and in need of frequent breaks to cool down.

September Average Humidity in Trail

This chart illustrates the average monthly humidity levels in Trail, 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 Trail is approximately 74%, 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 Trail

In Trail 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 Trail.

Maximum UV Index Levels in Trail for September

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

Data source: Trail 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 Trail Compares to Other Months

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

This table compares monthly weather conditions in Trail, 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 (24°F)	94 mm (3.7 inches)	90%	low
February Weather	-5°C (24°F)	80 mm (3.2 inches)	91%	moderate
March Weather	1°C (34°F)	84 mm (3.3 inches)	89%	moderate
April Weather	5°C (42°F)	83 mm (3.3 inches)	85%	high
May Weather	12°C (54°F)	68 mm (2.7 inches)	82%	very high
June Weather	16°C (61°F)	53 mm (2.1 inches)	81%	very high
July Weather	20°C (69°F)	17 mm (0.7 inches)	84%	very high
August Weather	20°C (68°F)	28 mm (1.1 inches)	75%	very high
September Weather	14°C (57°F)	56 mm (2.2 inches)	74%	high
October Weather	5°C (42°F)	79 mm (3.1 inches)	85%	moderate
November Weather	1°C (33°F)	102 mm (4.0 inches)	88%	low
December Weather	-4°C (25°F)	103 mm (4.1 inches)	93%	low