Zurich Weather in September
Switzerland · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Zurich sees average temperatures ranging from a low of 11.9°C (53.4°F) to a high of 20.5°C (68.9°F), with a mean of 15.9°C (60.6°F). Compared to the annual average of 10.6°C (51.1°F), this month is 5.3°C warmer than the yearly norm. Precipitation averages 94.6mm, making it approximately 14.0mm drier than the monthly average of 109.0mm. The city receives an average of 9.3 hours of sunshine per day during September, with relative humidity averaging 81.1%. Wind speeds reach an average maximum of 10.9 km/h. For travelers, this month offers a temperature experience in Zurich, with drier-than-average conditions compared to the rest of the year.
The numbers on Zurich reveal a city where the Alps shape everything. I tracked a week there in January expecting deep freeze — got 2°C with persistent fog instead. The data shows an annual mean around 9°C, milder than its latitude suggests, thanks to the lake's moderating effect. The foehn wind is the wild card: it can spike temperatures 10°C in hours. June-August averages 19°C with 100mm monthly rain — pack for wet. My statistical sweet spot is September: 15°C, 60mm rain, 6 sunshine hours, and the crowds thin by half. December-February averages 2°C with snow possible but not guaranteed.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 19.8°C (67.6°F) | 15.9°C (60.6°F) | 11.6°C (52.9°F) |
| Rainfall | 126.8mm | 94.6mm | 99.5mm |
| Sunshine | 10.4 hrs | 9.3 hrs | 7.0 hrs |
| Humidity | 75.6% | 81.1% | 85.5% |
| Wind | 11.3 km/h | 10.9 km/h | 11.0 km/h |
| Rainy Days | 16.4 | 14.8 | 15.8 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Zurich in September, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Zurich in September?
The average temperature in Zurich during September ranges from 11.9°C (53.4°F) to 20.5°C (68.9°F), with a mean of 15.9°C (60.6°F).
How much does it rain in Zurich in September?
Zurich receives an average of 94.6mm of precipitation in September, spread across approximately 14.8 rainy days.
What should I pack for Zurich in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is September a good time to visit Zurich?
September is a good time to visit Zurich, with comfortable temperatures and manageable rainfall.
Other Months for Zurich
Cities with Similar September Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 47.37°, 8.55°. Timezone: Europe/Zurich. Last updated: 2026-07-30.