Last updated: June 18, 2025
In September, the average temperature in Greenstone, Canada is a mild 11°C (53°F). Visitors can expect temperatures to range from a chilly -2°C (28°F) to a warm 27°C (80°F). During this month, precipitation is quite significant, with approximately 123 mm (4.8 in) expected over about 14 days. Additionally, the average humidity level is around 78%, creating a notably damp atmosphere.
In September in Greenstone, the average temperature is 11°C (53°F), with maximums reaching up to 27°C (80°F) and minimums dropping as low as -2°C (28°F). This unpredictable weather makes it essential for travelers to pack layers to ensure comfort throughout their stay.
In Greenstone in September, the precipitation amount is 123 mm (4.8 in) over a span of 14 days.
In Greenstone in September, humidity is 78%. With an average temperature of 11°C (53°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities somewhat uncomfortable as you navigate through the unpredictable weather.
In Greenstone 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 Greenstone, you can refer to this Hourly UV Index in Greenstone.
UV Risk Categories
Weather in Greenstone varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Greenstone, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -15°C (5°F) | 27 mm (1.1 inches) | 95% | low |
| February Weather | -15°C (5°F) | 43 mm (1.7 inches) | 94% | moderate |
| March Weather | -8°C (18°F) | 37 mm (1.4 inches) | 93% | moderate |
| April Weather | -1°C (31°F) | 59 mm (2.3 inches) | 89% | high |
| May Weather | 8°C (47°F) | 59 mm (2.3 inches) | 77% | very high |
| June Weather | 15°C (59°F) | 77 mm (3.0 inches) | 71% | very high |
| July Weather | 18°C (66°F) | 70 mm (2.8 inches) | 67% | very high |
| August Weather | 16°C (62°F) | 70 mm (2.8 inches) | 71% | very high |
| September Weather | 11°C (53°F) | 123 mm (4.8 inches) | 78% | high |
| October Weather | 4°C (40°F) | 84 mm (3.3 inches) | 84% | moderate |
| November Weather | -4°C (24°F) | 64 mm (2.5 inches) | 88% | low |
| December Weather | -12°C (11°F) | 55 mm (2.2 inches) | 94% | low |