Last updated: March 2, 2024
The weather in Montreal, United States, during August is characterized by an average temperature of 19°C (67°F). Highs can soar to 31°C (89°F), while lows may dip to 8°C (46°F). Typically, the humidity level in Montreal throughout August hovers around 71%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In August, Montreal averages 110 mm (4.3 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 14 hours 4 minutes of daylight, with the sun shining for approximately 10 hours 5 minutes each day. Additionally, there is a 58% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In August, the UV Index in Montreal reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 8 | 6 | 5 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||