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15-day forecast for Heiden

Right now

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From 27 Sep to 12 Oct in Heiden: 2 day(s) of clear skies expected, highs from 12 to 24 °C and 49.8 mm of precipitation in total. Day-by-day table (Open-Meteo model).

DayWeatherMinMaxPrecip.WindConfidence
Todaysunny12 °C22 °C0.0 mm11 km/hmedium
Tomorrowpartly cloudy14 °C24 °C0.0 mm10 km/hhigh
Tue 29 Sepovercast15 °C23 °C0.0 mm7 km/hmedium
Wed 30 Sepovercast17 °C24 °C0.0 mm6 km/hmedium
Thu 1 Octlight rain13 °C20 °C4.7 mm6 km/hmedium
Fri 2 Octfog13 °C18 °C0.0 mm5 km/hhigh
Sat 3 Octfog11 °C19 °C0.0 mm6 km/hmedium
DayWeatherMinMaxPrecip.WindConfidence
Sun 4 Octshowers11 °C17 °C11.4 mm6 km/h
Mon 5 Octshowers12 °C15 °C13.5 mm12 km/h
Tue 6 Octheavy drizzle10 °C12 °C10.5 mm7 km/h
Wed 7 Octlight drizzle6 °C14 °C1.5 mm6 km/h
Thu 8 Octlight drizzle7 °C15 °C0.9 mm7 km/h
Fri 9 Octlight drizzle8 °C13 °C2.7 mm7 km/h
Sat 10 Octlight drizzle7 °C13 °C2.1 mm5 km/h
Sun 11 Octlight drizzle9 °C14 °C2.5 mm12 km/h
Mon 12 Octovercast– °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 9.0 °C in Heiden, the November norm 3.9 °C (MeteoSwiss 1991–2020, monthly means measured nearby).

Frequently asked questions

Are these 15-day forecasts reliable?

Reliability decreases with the horizon: excellent at 3 days, good up to 7, indicative beyond 10. Each passing day sharpens the rest.

Can the weather be forecast a month ahead?

No, not day by day. That is why this page completes the 16 forecast days with the MeteoSwiss monthly norms for Heiden: the most honest estimate beyond two weeks.

meteo-ch.ch · Open-Meteo data, MeteoSwiss norms 1991–2020