Zurich · Month comparison
June vs September
September ranks #1 overall vs June at #2. The undersold sweet spot — warm enough for the lake, dry enough for the alps, prices drop from August.
June
#2 of 12 months
Best match
Festival season opens with Zürifäscht and the lake at 19°C — outdoor Zurich at its best.
- ↑Zürifäscht (every 3 years, when scheduled) — biggest open-air event in Switzerland
- ↑Lake at 19-20°C — proper swimming at Seebad Utoquai and Mythenquai
September
#1 of 12 months
Best match
The undersold sweet spot — warm enough for the lake, dry enough for the alps, prices drop from August.
- ↑20°C and lake still at 20°C through early September — last realistic swim window
- ↑Knabenschiessen folk festival (2nd weekend) on Albisgüetli — fairground and shooting tradition
| Factor | June | September |
|---|---|---|
| Weather score | 9 | 9 |
| Value score | 4 | 5 |
| Crowd score | 5 | 5 |
| Events score | 8 | 7 |
| Atmosphere | 9 | 10 |
| Avg high temp | 22°C | 20°C |
| Monthly rain | 105mm | 80mm |
| Daily sunshine | 8hrs | 7hrs |
June trade-offs
- ↓Rainfall year-peak with June — 105mm and afternoon thunderstorms 7-8 days
- ↓Hotel rates jump 40% from May — peak business-travel month also
September trade-offs
- ↓Daylight contracting — by month end down to 12 hours
- ↓Lake temperature drops fast in the last week — pack a wetsuit if swimming end-Sep
Scores compare months within Zurich. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →