Last updated: June 18, 2025
In Saint-Hyacinthe, Canada, the average temperature in September hovers around 16°C (61°F). Be prepared for a wide range, as temperatures can dip to a chilly -1°C (30°F) or soar to a warm 31°C (88°F). Expect 64 mm (2.5 in) of precipitation spread over 9 days, and with an average humidity level of 78%, it's advisable to pack accordingly!
In September, in Saint-Hyacinthe, the average temperature is a pleasant 16°C (61°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as -1°C (30°F). This weather makes Saint-Hyacinthe an ideal destination for those seeking a diverse climate experience during their travels.
In Saint-Hyacinthe in September, the precipitation amount is 64 mm (2.5 in) over a span of 9 days.
In Saint-Hyacinthe in September, humidity is 78%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as it clings to your skin and creates a heavy atmosphere that can drain your energy.
In Saint-Hyacinthe 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 Saint-Hyacinthe.
UV Risk Categories
Weather in Saint-Hyacinthe varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Hyacinthe, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (17°F) | 86 mm (3.4 inches) | 93% | low |
| February Weather | -7°C (19°F) | 82 mm (3.2 inches) | 92% | moderate |
| March Weather | -2°C (28°F) | 85 mm (3.3 inches) | 86% | moderate |
| April Weather | 6°C (43°F) | 119 mm (4.7 inches) | 85% | very high |
| May Weather | 14°C (57°F) | 98 mm (3.8 inches) | 80% | very high |
| June Weather | 19°C (66°F) | 107 mm (4.2 inches) | 74% | very high |
| July Weather | 22°C (71°F) | 98 mm (3.9 inches) | 76% | very high |
| August Weather | 21°C (69°F) | 113 mm (4.5 inches) | 75% | very high |
| September Weather | 16°C (61°F) | 64 mm (2.5 inches) | 78% | high |
| October Weather | 10°C (49°F) | 133 mm (5.3 inches) | 86% | moderate |
| November Weather | 1°C (34°F) | 118 mm (4.6 inches) | 88% | moderate |
| December Weather | -5°C (23°F) | 89 mm (3.5 inches) | 89% | low |