Last updated: June 18, 2025
In September, the average temperature in Napierville, Canada hovers around 16°C (62°F), with the thermometer dipping to a chilly 0°C (33°F) and soaring up to a warm 32°C (91°F). This month brings 73 mm (2.9 in) of precipitation over 9 days, contributing to an average humidity of 78%. Whether you're enjoying the mild weather or bracing for a shower, Napierville offers a unique blend of climate experiences!
In September in Napierville, the average temperature is 16°C (62°F). Maximums can reach 32°C (91°F) and minimums can be as low as 0°C (33°F). It's an ideal month for travelers who enjoy mild to warm temperatures and are prepared for cooler nights.
In Napierville in September, the precipitation amount is 73 mm (2.9 in), occurring over the course of 9 days.
In Napierville in September, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.
In Napierville 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 Napierville.
UV Risk Categories
Weather in Napierville varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Napierville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (19°F) | 81 mm (3.2 inches) | 93% | low |
| February Weather | -6°C (21°F) | 80 mm (3.1 inches) | 92% | moderate |
| March Weather | -1°C (30°F) | 82 mm (3.2 inches) | 86% | moderate |
| April Weather | 6°C (43°F) | 116 mm (4.6 inches) | 85% | high |
| May Weather | 14°C (57°F) | 98 mm (3.8 inches) | 80% | very high |
| June Weather | 19°C (67°F) | 112 mm (4.4 inches) | 74% | very high |
| July Weather | 22°C (72°F) | 116 mm (4.6 inches) | 76% | very high |
| August Weather | 21°C (70°F) | 115 mm (4.5 inches) | 75% | very high |
| September Weather | 16°C (62°F) | 73 mm (2.9 inches) | 78% | high |
| October Weather | 10°C (51°F) | 141 mm (5.6 inches) | 86% | moderate |
| November Weather | 2°C (35°F) | 114 mm (4.5 inches) | 88% | moderate |
| December Weather | -4°C (25°F) | 82 mm (3.2 inches) | 89% | low |