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September Weather in Edmonton, Canada

Last updated: June 18, 2025

In Edmonton, Canada, the average temperature in September hovers around 10°C (51°F), offering a mild climate. However, don’t be surprised by the temperature swings—it can dip to a chilly -3°C (27°F) or soar to a warm 30°C (87°F). Expect precipitation of about 46 mm (1.8 in) over 8 days, contributing to an average humidity of 73%. Prepare accordingly for this variable weather!

September Temperature in Edmonton

In September in Edmonton, the average temperature is 10°C (51°F), with maximums reaching up to 30°C (87°F) and minimums dropping as low as -3°C (27°F). Be prepared for a wide range of temperatures during your travels!

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 10°C (51°F), with highs reaching up to 30°C (87°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec13923365259636050372315
Data source: Temperature data for Edmonton 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 Edmonton

In Edmonton in September, the precipitation amount is 46 mm (1.8 in) over the course of 8 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 46 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1820242961991026946273620
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Edmonton

In Edmonton in September, humidity is 73%. With an average temperature of 10°C (51°F), this humidity feels like a chilly dampness that can make outdoor activities uncomfortable, causing your clothes to cling to your skin and a persistent coolness that seeps into your bones, which might deter long excursions without proper layering.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%87%81%77%77%81%78%73%78%82%91%
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 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Edmonton, you can refer to this 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 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235677876421
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.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (13°F)18 mm (0.7 inches)90%low
February Weather-13°C (9°F)20 mm (0.8 inches)92%moderate
March Weather-5°C (23°F)24 mm (1.0 inches)87%moderate
April Weather2°C (36°F)29 mm (1.1 inches)81%high
May Weather11°C (52°F)61 mm (2.4 inches)77%high
June Weather15°C (60°F)99 mm (3.9 inches)77%high
July Weather17°C (63°F)102 mm (4.0 inches)81%very high
August Weather16°C (60°F)69 mm (2.7 inches)78%high
September Weather10°C (51°F)46 mm (1.8 inches)73%high
October Weather3°C (38°F)27 mm (1.1 inches)78%moderate
November Weather-5°C (23°F)36 mm (1.4 inches)82%low
December Weather-9°C (15°F)20 mm (0.8 inches)91%low

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