Last updated: March 2, 2024
The weather in Coupeville, United States, during September is characterized by an average temperature of 14°C (58°F). Highs can soar to 19°C (67°F), while lows may dip to 11°C (52°F). Typically, the humidity level in Coupeville throughout September hovers around 76%.
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Average temperature
Maximum temperature
Humidity
In September, Coupeville averages 87 mm (3.4 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 12 hours 30 minutes of daylight, with the sun shining for approximately 8 hours 52 minutes each day. Additionally, there is a 38% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Coupeville reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 25 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 | 6 | 7 | 6 | 5 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||