Last updated: June 18, 2025
In September, the average temperature in Corner Brook, Canada hovers around 13°C (55°F), with a range that can dip to a chilly 1°C (34°F) and peak at a warm 23°C (74°F). Be prepared for some wet days, as 123 mm (4.8 in) of precipitation is expected over approximately 16 days. With an average humidity of 87%, make sure to pack accordingly for a comfortable visit!
In September in Corner Brook, the average temperature is 13°C (55°F), with maximums reaching 23°C (74°F) and minimums dropping to as low as 1°C (34°F). Be prepared for a range of weather conditions to make the most of your travel experience.
In Corner Brook in September, the precipitation amount is 123 mm (4.8 in) distributed over 16 days.
In Corner Brook in September, humidity is 87%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making travel sluggish and slightly uncomfortable, as each step seems to cling to the damp air.
In Corner Brook in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Corner Brook, you can refer to this Hourly UV Index in Corner Brook.
UV Risk Categories
Weather in Corner Brook varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Corner Brook, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 101 mm (4.0 inches) | 88% | low |
| February Weather | -7°C (19°F) | 124 mm (4.9 inches) | 90% | moderate |
| March Weather | -4°C (25°F) | 109 mm (4.3 inches) | 89% | moderate |
| April Weather | 1°C (34°F) | 103 mm (4.0 inches) | 88% | high |
| May Weather | 6°C (42°F) | 98 mm (3.9 inches) | 87% | very high |
| June Weather | 11°C (52°F) | 105 mm (4.2 inches) | 85% | very high |
| July Weather | 15°C (60°F) | 86 mm (3.4 inches) | 90% | very high |
| August Weather | 17°C (63°F) | 125 mm (4.9 inches) | 90% | very high |
| September Weather | 13°C (55°F) | 123 mm (4.8 inches) | 87% | high |
| October Weather | 7°C (45°F) | 130 mm (5.1 inches) | 84% | moderate |
| November Weather | 3°C (37°F) | 163 mm (6.4 inches) | 83% | low |
| December Weather | -2°C (29°F) | 156 mm (6.1 inches) | 85% | low |