September Weather in Bonnyville, Canada

Last updated: June 18, 2025

In September, the average temperature in Bonnyville, Canada hovers around 10°C (50°F). Expect a range where the minimum can dip to -4°C (24°F) while the maximum might soar to 28°C (82°F). With an average humidity of 76%, it can feel quite muggy at times. Prepare for some moisture, as you might encounter about 40 mm (1.6 in) of precipitation over 7 days.

September Temperature in Bonnyville

In September in Bonnyville, the average temperature is 10°C (50°F), with maximums reaching up to 28°C (82°F) and minimums dropping to as low as -4°C (24°F). This makes it essential for travelers to pack layers to prepare for both warm days and chilly nights.

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

The chart illustrates September temperature patterns in Bonnyville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bonnyville, September typically has an average temperature of 10°C (50°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (24°F).

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

September Precipitation in Bonnyville

In Bonnyville in September, the precipitation amount is 40 mm (1.6 in) over a span of 7 days.

September Precipitation Trends in Bonnyville

The chart displays monthly precipitation patterns in Bonnyville, 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 Bonnyville, September typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 7 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 Bonnyville

In Bonnyville in September, humidity is 76%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that seeps through your clothes, making outdoor activities quite uncomfortable and necessitating a layer of warmth for traveling.

September Average Humidity in Bonnyville

This chart illustrates the average monthly humidity levels in Bonnyville, 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 Bonnyville is approximately 76%, 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 Bonnyville

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

Maximum UV Index Levels in Bonnyville for September

The chart shows the monthly maximum UV Index (UVI) for Bonnyville 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 Bonnyville typically reaches 6, which falls under the high exposure category.

Data source: Bonnyville 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 Bonnyville Compares to Other Months

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

This table compares monthly weather conditions in Bonnyville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-13°C (9°F)	19 mm (0.7 inches)	90%	low
February Weather	-15°C (5°F)	16 mm (0.6 inches)	93%	low
March Weather	-6°C (22°F)	24 mm (1.0 inches)	92%	moderate
April Weather	2°C (35°F)	34 mm (1.3 inches)	80%	moderate
May Weather	11°C (52°F)	44 mm (1.7 inches)	69%	high
June Weather	15°C (60°F)	112 mm (4.4 inches)	68%	very high
July Weather	18°C (64°F)	104 mm (4.1 inches)	80%	very high
August Weather	16°C (61°F)	55 mm (2.2 inches)	80%	high
September Weather	10°C (50°F)	40 mm (1.6 inches)	76%	high
October Weather	2°C (36°F)	28 mm (1.1 inches)	82%	moderate
November Weather	-6°C (21°F)	29 mm (1.2 inches)	86%	low
December Weather	-11°C (12°F)	18 mm (0.7 inches)	94%	low