Last updated: March 2, 2024
The weather in Bay City, United States, during September is characterized by an average temperature of 27°C (81°F). Highs can soar to 34°C (94°F), while lows may dip to 17°C (63°F). Typically, the humidity level in Bay City throughout September hovers around 73%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Bay City averages 165 mm (6.5 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 17 minutes of daylight, with the sun shining for approximately 9 hours 17 minutes each day. Additionally, there is a 49% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Bay City reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 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 | 7 | 9 | 11 | 10 | 8 | 6 | 3 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||