September Weather in Altona, Canada

Last updated: June 18, 2025

In September, the average temperature in Altona, Canada hovers around 14°C (58°F). However, temperatures can swing dramatically, dipping as low as -2°C (28°F) or soaring up to 35°C (95°F). Expect about 78 mm (3.1 in) of precipitation over 9 days, accompanied by an average humidity of 73%. This blend of conditions makes for a unique climate experience throughout the month!

September Temperature in Altona

In September in Altona, the average temperature is 14°C (58°F). The maximum can reach 35°C (95°F), while the minimum can be as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Altona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altona, September typically has an average temperature of 14°C (58°F), with highs reaching up to 35°C (95°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in Altona

In Altona in September, the precipitation amount is 78 mm (3.1 in) over the course of 9 days.

September Precipitation Trends in Altona

The chart displays monthly precipitation patterns in Altona, 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 Altona, September typically receives around 78 mm (3.1 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 Altona

In Altona in September, humidity is 73%. With an average temperature of 14°C (58°F), this humidity feels like a warm, damp blanket wrapping around you, making outdoor activities a bit uncomfortable for traveling unless you stay hydrated and take frequent breaks in the shade.

September Average Humidity in Altona

This chart illustrates the average monthly humidity levels in Altona, 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 Altona is approximately 73%, 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 Altona

In Altona 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 Altona.

Maximum UV Index Levels in Altona for September

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

Data source: Altona 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 Altona Compares to Other Months

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

This table compares monthly weather conditions in Altona, 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)	16 mm (0.6 inches)	92%	low
February Weather	-15°C (6°F)	17 mm (0.7 inches)	90%	moderate
March Weather	-5°C (24°F)	19 mm (0.7 inches)	88%	moderate
April Weather	3°C (37°F)	25 mm (1.0 inches)	81%	high
May Weather	13°C (55°F)	46 mm (1.8 inches)	74%	very high
June Weather	20°C (67°F)	73 mm (2.9 inches)	72%	very high
July Weather	22°C (71°F)	59 mm (2.3 inches)	74%	very high
August Weather	20°C (68°F)	58 mm (2.3 inches)	76%	very high
September Weather	14°C (58°F)	78 mm (3.1 inches)	73%	high
October Weather	6°C (43°F)	72 mm (2.8 inches)	76%	moderate
November Weather	-4°C (25°F)	27 mm (1.1 inches)	86%	low
December Weather	-9°C (16°F)	27 mm (1.1 inches)	91%	low