Zurich · Month comparison

April vs September

September ranks #1 overall vs April at #5. The undersold sweet spot — warm enough for the lake, dry enough for the alps, prices drop from August.

Sechseläuten Böögg snowman burning on Sechseläutenplatz

April

#5 of 12 months

Best match

Sechseläuten burns the Böögg — Zurich's biggest spring tradition.

  • ↑Sechseläuten (3rd Monday in April) — guild parade and the Böögg snowman burning on Sechseläutenplatz
  • ↑14°C and lengthening evenings — first proper Limmatquai apéro weather
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
FactorAprilSeptember
Weather score
7
9
Value score
6
5
Crowd score
7
5
Events score
8
7
Atmosphere
8
10
Avg high temp14°C20°C
Monthly rain80mm80mm
Daily sunshine6hrs7hrs

April trade-offs

  • ↓80mm rain across 12-14 wet days — properly showery month, plan around it
  • ↓Lake swimming still 8°C — Seebad Enge's diehards only

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