St Gallen weather in August 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in St Gallen in August. Check more long-term weather averages for St Gallen in August before you book your next holiday to Switzerland in 2025/2026.

  • 21°C maximum daytime temperature in August in St Gallen21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 18 days with some rainfall in August in St Gallen18
    18 days with some rainfall
  • 12°C minimum night-time temperature in August in St Gallen12
    12°C min night temperature
  • 14 hours of daylight per day in August in St Gallen14
    14 hours of daylight per day
  • No heat & humidity in August in St Gallen0
    No heat & humidity
  • 128 mm monthly rainfall in August in St Gallen128
    128 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in St Gallen7
    7 (High) UV index

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The August weather guide for Switzerland (St Gallen) 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 hot is it in St Gallen in August?

Daytime temperatures usually reach 21°C in St Gallen in August, falling to 12°C at night.

How sunny is it in St Gallen in August?

There are normally 7 hours of bright sunshine each day in St Gallen in August - that's 47% of daylight hours.

Does it rain in St Gallen in August?

There are usually 18 days with some rain in St Gallen in August and the average monthly rainfall is 128mm.

St Gallen August sunrise & sunset times

Browse the sunrise and sunset times for St Gallen in August 2025. Select a month to view St Gallen sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:01 19:56
Saturday, 16th August 2025 05:20 19:32
Sunday, 31st August 2025 05:40 19:04

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