September Weather in Swanley

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%.

7°C (44°F)

Minimum temperature

15°C (60°F)

Average temperature

25°C (76°F)

Maximum temperature

80%

Humidity

Precipitation and Sunshine hours

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.

46 mm (1.8 inches)

Precipitation

10 rainy days

Rainy days

10 hours 23 minutes

Sunshine hours

30%

Chance of sun

UV Index

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.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  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

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