Last updated: March 2, 2024
The weather in South Pasadena, United States, during September is characterized by an average temperature of 27°C (82°F). Highs can soar to 31°C (88°F), while lows may dip to 24°C (76°F). Typically, the humidity level in South Pasadena throughout September hovers around 78%.
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Average temperature
Maximum temperature
Humidity
In September, South Pasadena averages 143 mm (5.6 inches) of rainfall, typically over the course of 18 rainy days. The month enjoys an average of 12 hours 16 minutes of daylight, with the sun shining for approximately 10 hours 21 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in South Pasadena 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 | 0 | 1 | 2 | 4 | 7 | 10 | 11 | 11 | 9 | 6 | 4 | 2 | 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 | ||||