Last updated: June 18, 2025
In September, the average temperature in Petawawa, Canada hovers around 15°C (59°F), with a comfortable range that can drop as low as 1°C (35°F) and peak at 29°C (85°F). Expect approximately 97 mm (3.8 in) of precipitation scattered over 10 days, contributing to an average humidity of 72%. Whether you enjoy a cool breeze or a sunny day, September offers a little something for everyone!
In September in Petawawa, the average temperature is 15°C (59°F). The maximum can reach 29°C (85°F), and the minimum can be as low as 1°C (35°F). This makes it a perfect time for travelers to enjoy a mix of warm sunny days and cooler nights, so pack accordingly!
In Petawawa in September, the total precipitation amount is 97 mm (3.8 in) over a span of 10 days.
In Petawawa in September humidity is 72%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket wrapping around you, creating a sultry atmosphere that can make traveling a bit uncomfortable. The stickiness in the air can leave you feeling sluggish, so it’s advisable to stay hydrated and take breaks often while exploring.
In Petawawa 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 Petawawa.
UV Risk Categories
Weather in Petawawa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Petawawa, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -10°C (14°F) | 63 mm (2.5 inches) | 93% | low |
| February Weather | -9°C (17°F) | 74 mm (2.9 inches) | 93% | moderate |
| March Weather | -4°C (25°F) | 71 mm (2.8 inches) | 86% | moderate |
| April Weather | 4°C (39°F) | 105 mm (4.1 inches) | 82% | high |
| May Weather | 11°C (53°F) | 111 mm (4.4 inches) | 75% | very high |
| June Weather | 17°C (63°F) | 102 mm (4.0 inches) | 68% | very high |
| July Weather | 21°C (70°F) | 103 mm (4.0 inches) | 69% | very high |
| August Weather | 19°C (67°F) | 106 mm (4.2 inches) | 67% | very high |
| September Weather | 15°C (59°F) | 97 mm (3.8 inches) | 72% | high |
| October Weather | 8°C (47°F) | 106 mm (4.2 inches) | 83% | moderate |
| November Weather | 0°C (32°F) | 86 mm (3.4 inches) | 88% | moderate |
| December Weather | -7°C (20°F) | 80 mm (3.1 inches) | 89% | low |