Last updated: March 2, 2024
The weather in Thunder Bay, Canada, during July is characterized by an average temperature of 19°C (66°F). Highs can soar to 29°C (85°F), while lows may dip to 10°C (50°F). Typically, the humidity level in Thunder Bay throughout July hovers around 70%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In July, Thunder Bay averages 82 mm (3.2 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 15 hours 36 minutes of daylight, with the sun shining for approximately 11 hours 42 minutes each day. Additionally, there is a 62% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In July, the UV Index in Thunder Bay reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, 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 | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 8 | 7 | 5 | 3 | 2 |
| 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 | ||||||