Last updated: June 18, 2025
In September, the average temperature in St. Jean Baptiste, Canada is a mild 14°C (58°F). However, be prepared for a wide range, as temperatures can dip to a chilly -3°C (28°F) and soar up to a sweltering 34°C (94°F). Expect about 87 mm (3.4 in) of precipitation spread over 10 days, with average humidity hovering around 75%. Stay comfortable and enjoy the seasonal changes!
In September in St. Jean Baptiste, the average temperature is 14°C (58°F). Maximums can reach 34°C (94°F), while minimums can drop to as low as -3°C (28°F). Be prepared for a wide range of temperatures when traveling during this time.
In St. Jean Baptiste in September, the precipitation amount is 87 mm (3.4 in) over the course of 10 days.
In St. Jean Baptiste in September humidity is 75%. With an average temperature of 14°C (58°F), this humidity feels like a lingering blanket of warmth, making travel both refreshing and a bit stifling, as the moisture in the air may leave you feeling slightly sticky while enjoying outdoor adventures.
In St. Jean Baptiste 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 St. Jean Baptiste.
UV Risk Categories
Weather in St. Jean Baptiste varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in St. Jean Baptiste, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -14°C (8°F) | 17 mm (0.7 inches) | 94% | low |
| February Weather | -15°C (5°F) | 17 mm (0.7 inches) | 91% | moderate |
| March Weather | -5°C (23°F) | 19 mm (0.7 inches) | 90% | moderate |
| April Weather | 3°C (37°F) | 27 mm (1.1 inches) | 81% | high |
| May Weather | 12°C (55°F) | 42 mm (1.7 inches) | 74% | very high |
| June Weather | 19°C (67°F) | 74 mm (2.9 inches) | 75% | very high |
| July Weather | 21°C (71°F) | 71 mm (2.8 inches) | 74% | very high |
| August Weather | 19°C (67°F) | 58 mm (2.3 inches) | 77% | very high |
| September Weather | 14°C (58°F) | 87 mm (3.4 inches) | 75% | high |
| October Weather | 6°C (42°F) | 71 mm (2.8 inches) | 78% | moderate |
| November Weather | -4°C (25°F) | 28 mm (1.1 inches) | 87% | low |
| December Weather | -10°C (14°F) | 26 mm (1.0 inches) | 93% | low |