15-day forecast for Gossau (ZH)

From 27 Sep to 12 Oct in Gossau (ZH): 2 day(s) of clear skies expected, highs from 14 to 27 °C and 35.7 mm of precipitation in total. Day-by-day table (Open-Meteo model).

Day	Weather	Min	Max	Precip.	Wind	Confidence
Today	mostly sunny	10 °C	26 °C	0.0 mm	6 km/h	high
Tomorrow	overcast	12 °C	27 °C	0.0 mm	9 km/h	high
Tue 29 Sep	overcast	14 °C	26 °C	0.0 mm	8 km/h	medium
Wed 30 Sep	overcast	16 °C	25 °C	0.0 mm	8 km/h	medium
Thu 1 Oct	light rain	16 °C	18 °C	1.8 mm	4 km/h	low
Fri 2 Oct	fog	14 °C	20 °C	0.0 mm	10 km/h	medium
Sat 3 Oct	fog	13 °C	21 °C	0.0 mm	5 km/h	medium

Day	Weather	Min	Max	Precip.	Wind	Confidence
Sun 4 Oct	showers	14 °C	17 °C	12.3 mm	4 km/h
Mon 5 Oct	showers	14 °C	16 °C	6.3 mm	10 km/h
Tue 6 Oct	showers	11 °C	14 °C	9.6 mm	6 km/h
Wed 7 Oct	overcast	9 °C	16 °C	0.0 mm	7 km/h
Thu 8 Oct	light drizzle	8 °C	16 °C	0.9 mm	5 km/h
Fri 9 Oct	light drizzle	11 °C	14 °C	2.1 mm	6 km/h
Sat 10 Oct	light drizzle	9 °C	14 °C	0.9 mm	5 km/h
Sun 11 Oct	light drizzle	8 °C	16 °C	1.8 mm	10 km/h
Mon 12 Oct	overcast	– °C	– °C	– mm	– km/h

Confidence index: agreement of 4 independent models (ICON, GFS, IFS, ARPEGE) on the daily high and on rain. High = highs within 2 °C and the same rain verdict; low = more than 4 °C apart or models split on rain.

And at 20, 25 or 30 days? No model seriously forecasts that far. Climatology takes over: the October norm is 10.6 °C in Gossau (ZH), the November norm 5.7 °C (MeteoSwiss 1991–2020, monthly means measured nearby).

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