September Weather in Edmonton, United States

Last updated: June 24, 2025

In September, the average temperature in Edmonton, United States hovers around 22°C (73°F), creating a comfortable ambiance for outdoor activities. However, be prepared for a range, as temperatures can dip to a minimum of 8°C (47°F) and soar to a maximum of 36°C (97°F). With 125 mm (4.9 in) of precipitation spread over 9 days, a light raincoat might come in handy. On top of that, the average humidity sits at 71%, adding a touch of tropical warmth to the air.

September Temperature in Edmonton

In September in Edmonton, the average temperature is 22°C (73°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop as low as 8°C (47°F). This makes Edmonton a great destination for travelers seeking mild weather during the day and cooler evenings.

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

The chart illustrates September temperature patterns in Edmonton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Edmonton, September typically has an average temperature of 22°C (73°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Edmonton

In Edmonton in September, the total precipitation amount is 125 mm (4.9 in) recorded over a span of 9 days.

September Precipitation Trends in Edmonton

The chart displays monthly precipitation patterns in Edmonton, 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 Edmonton, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 9 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 Edmonton

In Edmonton in September humidity is 71%. With an average temperature of 22°C (73°F), this humidity feels like a thick, warm blanket wrapping around you, making travel feel a bit sluggish but still pleasant as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Edmonton

This chart illustrates the average monthly humidity levels in Edmonton, 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 Edmonton is approximately 71%, 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 Edmonton

In Edmonton in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Edmonton.

Maximum UV Index Levels in Edmonton for September

The chart shows the monthly maximum UV Index (UVI) for Edmonton 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 Edmonton typically reaches 9, which falls under the very high exposure category.

Data source: Edmonton 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 Edmonton Compares to Other Months

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

This table compares monthly weather conditions in Edmonton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	102 mm (4.0 inches)	87%	moderate
February Weather	6°C (44°F)	191 mm (7.5 inches)	86%	high
March Weather	10°C (51°F)	150 mm (5.9 inches)	86%	high
April Weather	14°C (58°F)	151 mm (5.9 inches)	82%	very high
May Weather	20°C (69°F)	128 mm (5.0 inches)	82%	very high
June Weather	24°C (75°F)	175 mm (6.9 inches)	83%	extreme
July Weather	26°C (79°F)	126 mm (5.0 inches)	80%	extreme
August Weather	25°C (77°F)	128 mm (5.0 inches)	74%	very high
September Weather	22°C (73°F)	125 mm (4.9 inches)	71%	very high
October Weather	17°C (62°F)	138 mm (5.4 inches)	78%	high
November Weather	8°C (47°F)	89 mm (3.5 inches)	88%	moderate
December Weather	6°C (44°F)	151 mm (5.9 inches)	88%	moderate