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September Weather in Stony Plain, Canada

Last updated: August 22, 2025

In September, the average temperature in Stony Plain, Canada hovers around 10°C (51°F). Expect lows of -3°C (27°F) and highs reaching 30°C (86°F). Amidst these variations, the region sees a precipitation total of 52 mm (2.1 in) over approximately 9 days. With an average humidity of 73%, prepare for a relatively moist atmosphere throughout the month.

September Temperature in Stony Plain

In September in Stony Plain, the average temperature is 10°C (51°F). The maximum can reach 30°C (86°F) and the minimum can be as low as -3°C (27°F). This variation makes Stony Plain a destination where travelers should be prepared for both warm days and chilly nights.

September Weather in Stony Plain: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Stony Plain, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stony Plain, September typically has an average temperature of 10°C (51°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec141024365259636050382416
Data source: Temperature data for Stony Plain 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 Stony Plain

In Stony Plain in September, the total precipitation amount is 52 mm (2.1 in) over the course of 9 days.

September Precipitation Trends in Stony Plain

The chart displays monthly precipitation patterns in Stony Plain, 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 Stony Plain, September typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec18212731621011096152273921
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stony Plain

In Stony Plain 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 Stony Plain

This chart illustrates the average monthly humidity levels in Stony Plain, 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 Stony Plain 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 Stony Plain

In Stony Plain 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 Stony Plain, you can refer to this Hourly UV Index in Stony Plain.

Maximum UV Index Levels in Stony Plain for September

The chart shows the monthly maximum UV Index (UVI) for Stony Plain 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 Stony Plain typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec134577876421
Data source: Stony Plain 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 Stony Plain Compares to Other Months

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

This table compares monthly weather conditions in Stony Plain, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)18 mm (0.7 inches)90%low
February Weather-12°C (11°F)21 mm (0.8 inches)92%moderate
March Weather-4°C (24°F)27 mm (1.0 inches)87%moderate
April Weather2°C (36°F)31 mm (1.2 inches)81%moderate
May Weather11°C (52°F)62 mm (2.4 inches)77%high
June Weather15°C (60°F)101 mm (4.0 inches)77%high
July Weather17°C (63°F)109 mm (4.3 inches)81%very high
August Weather16°C (61°F)61 mm (2.4 inches)78%high
September Weather10°C (51°F)52 mm (2.1 inches)73%high
October Weather3°C (38°F)27 mm (1.0 inches)78%moderate
November Weather-4°C (24°F)39 mm (1.5 inches)82%low
December Weather-9°C (17°F)21 mm (0.8 inches)91%low

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