Last updated: March 2, 2024
The weather in Grand Bay, United States, during September is characterized by an average temperature of 26°C (80°F). Highs can soar to 33°C (92°F), while lows may dip to 19°C (66°F). Typically, the humidity level in Grand Bay throughout September hovers around 80%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Grand Bay averages 170 mm (6.7 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 12 hours 18 minutes of daylight, with the sun shining for approximately 9 hours 24 minutes each day. Additionally, there is a 44% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Grand Bay 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 | 1 | 3 | 5 | 8 | 10 | 10 | 9 | 7 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | VeryHigh | High | Moderate | Low | |||||||
| Time to burn | 45 min | 30 min | 15 min | 25 min | 30 min | 45 min | |||||||