Last updated: March 2, 2024
The weather in San Francisco, Colombia, during September is characterized by an average temperature of 23°C (75°F). Highs can soar to 33°C (91°F), while lows may dip to 17°C (63°F). Typically, the humidity level in San Francisco throughout September hovers around 80%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, San Francisco averages 147 mm (5.8 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 12 hours 7 minutes of daylight, with the sun shining for approximately 9 hours 35 minutes each day. Additionally, there is a 20% 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 11:00 and 13:00, 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 | 7 | 11 | 14 | 14 | 13 | 9 | 6 | 3 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | Extreme | VeryHigh | High | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 10 min | 15 min | 25 min | 30 min | 45 min | |||||