Last updated: March 2, 2024
The weather in Swanley, United Kingdom, during September is characterized by an average temperature of 15°C (60°F). Highs can soar to 25°C (76°F), while lows may dip to 7°C (44°F). Typically, the humidity level in Swanley throughout September hovers around 80%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Swanley averages 46 mm (1.8 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 35 minutes of daylight, with the sun shining for approximately 10 hours 23 minutes each day. Additionally, there is a 30% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Swanley reaches a maximum of 5, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 30 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 | 4 | 5 | 5 | 5 | 4 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||