Last updated: June 18, 2025
In Lac-Brome, Canada, the average temperature in September hovers around 15°C (60°F). Expect a range from a chilly -3°C (27°F) to a warm 30°C (87°F). During this month, you'll likely encounter 84 mm (3.3 in) of precipitation spread over 11 days, contributing to the average humidity of 78%. Prepare accordingly for an interesting climate!
In September in Lac-Brome, the average temperature is 15°C (60°F), with maximums reaching 30°C (87°F) and minimums dropping as low as -3°C (27°F). Be prepared for a wide range of temperatures when planning your travels.
In Lac-Brome, in September, the precipitation amount is 84 mm (3.3 in) during a period of 11 days.
In Lac-Brome in September, humidity is 78%. With an average temperature of 15°C (60°F), this humidity feels like a warm, damp embrace that can make outdoor activities a bit uncomfortable, highlighting the importance of staying hydrated and taking breaks in the shade while exploring.
In Lac-Brome 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 Lac-Brome.
UV Risk Categories
Weather in Lac-Brome varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Lac-Brome, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 93 mm (3.7 inches) | 93% | low |
| February Weather | -7°C (20°F) | 89 mm (3.5 inches) | 92% | moderate |
| March Weather | -2°C (28°F) | 90 mm (3.5 inches) | 86% | moderate |
| April Weather | 5°C (42°F) | 120 mm (4.7 inches) | 85% | high |
| May Weather | 13°C (55°F) | 106 mm (4.2 inches) | 80% | very high |
| June Weather | 17°C (64°F) | 126 mm (5.0 inches) | 74% | very high |
| July Weather | 20°C (69°F) | 123 mm (4.8 inches) | 76% | very high |
| August Weather | 19°C (67°F) | 128 mm (5.0 inches) | 75% | very high |
| September Weather | 15°C (60°F) | 84 mm (3.3 inches) | 78% | high |
| October Weather | 9°C (49°F) | 147 mm (5.8 inches) | 86% | moderate |
| November Weather | 1°C (33°F) | 125 mm (4.9 inches) | 88% | moderate |
| December Weather | -5°C (23°F) | 86 mm (3.4 inches) | 89% | low |