September Weather in Simcoe, Canada

Last updated: June 18, 2025

In Simcoe, Canada, the average temperature in September hovers around 19°C (66°F), offering a mild climate. Expect temperatures to range from a refreshing 7°C (45°F) on cooler days to a warm 29°C (85°F) at their peak. During this month, anticipate around 80 mm (3.2 in) of precipitation over approximately 10 days, accompanied by an average humidity level of 81%, creating a pleasantly balanced atmosphere.

September Temperature in Simcoe

In September in Simcoe, the average temperature is 19°C (66°F), with maximums reaching 29°C (85°F) and minimums dipping as low as 7°C (45°F). This mild climate makes it a perfect time for travelers to explore and enjoy outdoor activities in Simcoe.

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

The chart illustrates September temperature patterns in Simcoe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Simcoe, September typically has an average temperature of 19°C (66°F), with highs reaching up to 29°C (85°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Simcoe

In Simcoe in September, the precipitation amount is 80 mm (3.2 in) over a span of 10 days.

September Precipitation Trends in Simcoe

The chart displays monthly precipitation patterns in Simcoe, 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 Simcoe, September typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Simcoe

In Simcoe in September, humidity is 81%. With an average temperature of 19°C (66°F), this humidity feels like a warm, heavy blanket enveloping you, making travel feel both muggy and slightly stifling, often leading to a need for frequent breaks in the shade.

September Average Humidity in Simcoe

This chart illustrates the average monthly humidity levels in Simcoe, 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 Simcoe is approximately 81%, 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 Simcoe

In Simcoe in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Simcoe.

Maximum UV Index Levels in Simcoe for September

The chart shows the monthly maximum UV Index (UVI) for Simcoe 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 Simcoe typically reaches 8, which falls under the very high exposure category.

Data source: Simcoe 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 Simcoe Compares to Other Months

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

This table compares monthly weather conditions in Simcoe, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	78 mm (3.1 inches)	90%	moderate
February Weather	-2°C (28°F)	81 mm (3.2 inches)	90%	moderate
March Weather	1°C (34°F)	80 mm (3.2 inches)	87%	moderate
April Weather	6°C (43°F)	104 mm (4.1 inches)	87%	very high
May Weather	13°C (55°F)	106 mm (4.2 inches)	82%	very high
June Weather	19°C (66°F)	85 mm (3.3 inches)	81%	very high
July Weather	23°C (73°F)	101 mm (4.0 inches)	79%	very high
August Weather	22°C (72°F)	91 mm (3.6 inches)	80%	very high
September Weather	19°C (66°F)	80 mm (3.2 inches)	81%	very high
October Weather	13°C (55°F)	118 mm (4.6 inches)	84%	high
November Weather	5°C (41°F)	92 mm (3.6 inches)	88%	moderate
December Weather	1°C (34°F)	89 mm (3.5 inches)	87%	low