September Weather in Interlaken

Last updated: March 2, 2024

The weather in Interlaken, Switzerland, during September is characterized by an average temperature of 11°C (53°F). Highs can soar to 22°C (72°F), while lows may dip to 2°C (36°F). Typically, the humidity level in Interlaken throughout September hovers around 83%.

2°C (36°F)

Minimum temperature

11°C (53°F)

Average temperature

22°C (72°F)

Maximum temperature

83%

Humidity

Precipitation and Sunshine hours

In September, Interlaken averages 124 mm (4.9 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 12 hours 30 minutes of daylight, with the sun shining for approximately 10 hours 43 minutes each day. Additionally, there is a 38% probability of sunny days during this period.

124 mm (4.9 inches)

Precipitation

14 rainy days

Rainy days

10 hours 43 minutes

Sunshine hours

38%

Chance of sun

UV Index

In September, the UV Index in Interlaken reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 25 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 5 6 7 6 5 4 2 1 1
Exposure Low Moderate High Moderate Low
Time to burn 45 min 30 min 25 min 30 min 45 min

Compare Interlaken's Climate with Cities Worldwide