Last updated: March 2, 2024
The weather in Saint John, United States, during August is characterized by an average temperature of 25°C (76°F). Highs can soar to 34°C (94°F), while lows may dip to 15°C (58°F). Typically, the humidity level in Saint John throughout August hovers around 80%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In August, Saint John averages 130 mm (5.1 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 13 hours 35 minutes of daylight, with the sun shining for approximately 10 hours 37 minutes each day. Additionally, there is a 47% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In August, the UV Index in Saint John reaches a maximum of 10, 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 | 9 | 9 | 9 | 7 | 5 | 3 | 1 | 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 | ||||||