Last updated: March 2, 2024
The weather in Port Townsend, United States, during September is characterized by an average temperature of 15°C (59°F). Highs can soar to 22°C (73°F), while lows may dip to 10°C (50°F). Typically, the humidity level in Port Townsend throughout September hovers around 74%.
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Average temperature
Maximum temperature
Humidity
In September, Port Townsend averages 129 mm (5.1 inches) of rainfall, typically over the course of 15 rainy days. The month enjoys an average of 12 hours 30 minutes of daylight, with the sun shining for approximately 8 hours 44 minutes each day. Additionally, there is a 36% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Port Townsend 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 | ||||||||