Locarno weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Locarno in September. Check more long-term weather averages for Locarno in September before you book your next holiday to Switzerland in 2025/2026.

  • 16°C maximum daytime temperature in September in Locarno16
    16°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Locarno12
    12 days with some rainfall
  • 9°C minimum night-time temperature in September in Locarno9
    9°C min night temperature
  • 13 hours of daylight per day in September in Locarno13
    13 hours of daylight per day
  • No heat & humidity in September in Locarno0
    No heat & humidity
  • 132 mm monthly rainfall in September in Locarno132
    132 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Locarno5
    5 (Moderate) UV index

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The September weather guide for Switzerland (Locarno) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Switzerland

How warm is it in Locarno in September?

Daytime temperatures usually reach 16°C in Locarno in September, falling to 9°C at night.

How sunny is it in Locarno in September?

There are normally 6 hours of bright sunshine each day in Locarno in September - that's 46% of daylight hours.

Does it rain in Locarno in September?

There are usually 12 days with some rain in Locarno in September and the average monthly rainfall is 132mm.

Locarno September sunrise & sunset times

Browse the sunrise and sunset times for Locarno in September 2025. Select a month to view Locarno sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:45 19:03
Monday, 15th September 2025 06:03 18:36
Tuesday, 30th September 2025 06:22 18:07

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