Last updated: March 2, 2024
The weather in Saint John, Canada, during August is characterized by an average temperature of 17°C (63°F). Highs can soar to 22°C (73°F), while lows may dip to 12°C (54°F). Typically, the humidity level in Saint John throughout August hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In August, Saint John averages 89 mm (3.5 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 13 hours 59 minutes of daylight, with the sun shining for approximately 10 hours 4 minutes each day. Additionally, there is a 29% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In August, the UV Index in Saint John 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 | 4 | 6 | 7 | 8 | 8 | 7 | 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 | ||||||