Zurich · Month comparison

July vs September

September ranks #1 overall vs July at #6. The undersold sweet spot — warm enough for the lake, dry enough for the alps, prices drop from August.

Swimmers floating down the Limmat past Zurich Altstadt

July

#6 of 12 months

Best match

Live at Sunset, Caliente, Theater Spektakel — the festival pile-up month.

  • ↑Live at Sunset concerts at Dolder — alpine-grade venue, world-class acts
  • ↑Lake at warmest 22°C; the Limmat float (swimming down through the city) is peak summer Zurich
Lake Zurich and Alps in clear September light

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
FactorJulySeptember
Weather score
9
9
Value score
3
5
Crowd score
4
5
Events score
9
7
Atmosphere
9
10
Avg high temp25°C20°C
Monthly rain105mm80mm
Daily sunshine9hrs7hrs

July trade-offs

  • ↓105mm rain shared with June — afternoon thunderstorms can wash out lake plans
  • ↓Hotel rates at peak — Bahnhofstrasse 4-star easily CHF 350+ a night

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
See all 12 months for Zurich →July in detail →September in detail →
Scores compare months within Zurich. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →