Last updated: March 2, 2024
The weather in San Francisco, Bolivia, during September is characterized by an average temperature of 14°C (57°F). Highs can soar to 28°C (83°F), while lows may dip to 2°C (36°F). Typically, the humidity level in San Francisco throughout September hovers around 42%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, San Francisco averages 53 mm (2.1 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 11 hours 58 minutes of daylight, with the sun shining for approximately 10 hours 41 minutes each day. Additionally, there is a 46% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in San Francisco reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 3 | 6 | 10 | 13 | 14 | 13 | 10 | 7 | 3 | 1 | 1 | 0 |
| 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 | ||||