Last updated: March 2, 2024
The weather in McChord Air Force Base, United States, during September is characterized by an average temperature of 17°C (63°F). Highs can soar to 27°C (81°F), while lows may dip to 10°C (50°F). Typically, the humidity level in McChord Air Force Base throughout September hovers around 74%.
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In September, McChord Air Force Base averages 83 mm (3.3 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 29 minutes of daylight, with the sun shining for approximately 8 hours 37 minutes each day. Additionally, there is a 35% probability of sunny days during this period.
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In September, the UV Index in McChord Air Force Base 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 | ||||||||