September Weather in Grenfell, Canada

Last updated: June 18, 2025

In September, the average temperature in Grenfell, Canada hovers around 12°C (54°F). Expect a range where the mercury can dip to a chilly -5°C (23°F) or soar to a warm 31°C (88°F). Be prepared for some rain, as 57 mm (2.2 in) of precipitation is likely over 7 days, accompanied by an average humidity of 73%.

September Temperature in Grenfell

In September in Grenfell, the average temperature is 12°C (54°F). Maximum temperatures can reach up to 31°C (88°F), while minimums can drop as low as -5°C (23°F). This diverse climate makes Grenfell an ideal destination for travelers seeking both warmth and cooler escapes.

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

The chart illustrates September temperature patterns in Grenfell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grenfell, September typically has an average temperature of 12°C (54°F), with highs reaching up to 31°C (88°F) and lows dropping to around -5°C (23°F).

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

September Precipitation in Grenfell

In Grenfell in September, the precipitation amount is 57 mm (2.2 in) over the course of 7 days.

September Precipitation Trends in Grenfell

The chart displays monthly precipitation patterns in Grenfell, 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 Grenfell, September typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 7 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 Grenfell

In Grenfell in September, humidity is 73%. With an average temperature of 12°C (54°F), this humidity feels like a chilly embrace, making travel moderately uncomfortable as the dampness can chill you to your bones, especially during early morning excursions or late afternoon strolls.

September Average Humidity in Grenfell

This chart illustrates the average monthly humidity levels in Grenfell, 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 Grenfell 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 Grenfell

In Grenfell 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 Grenfell.

Maximum UV Index Levels in Grenfell for September

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

Data source: Grenfell 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 Grenfell Compares to Other Months

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

This table compares monthly weather conditions in Grenfell, 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 (8°F)	14 mm (0.6 inches)	91%	low
February Weather	-16°C (4°F)	13 mm (0.5 inches)	94%	moderate
March Weather	-5°C (23°F)	26 mm (1.0 inches)	91%	moderate
April Weather	2°C (35°F)	30 mm (1.2 inches)	79%	high
May Weather	11°C (52°F)	43 mm (1.7 inches)	71%	very high
June Weather	17°C (62°F)	100 mm (3.9 inches)	65%	very high
July Weather	19°C (67°F)	55 mm (2.2 inches)	75%	very high
August Weather	17°C (63°F)	50 mm (2.0 inches)	76%	very high
September Weather	12°C (54°F)	57 mm (2.2 inches)	73%	high
October Weather	3°C (38°F)	31 mm (1.2 inches)	77%	moderate
November Weather	-5°C (23°F)	28 mm (1.1 inches)	88%	low
December Weather	-10°C (14°F)	21 mm (0.8 inches)	95%	low