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15-day forecast for Arosa

Right now

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From 27 Sep to 12 Oct in Arosa: 3 day(s) of clear skies expected, highs from 8 to 20 °C and 27.1 mm of precipitation in total. Day-by-day table (Open-Meteo model).

DayWeatherMinMaxPrecip.WindConfidence
Todaysunny6 °C20 °C0.0 mm9 km/hhigh
Tomorrowmostly sunny8 °C20 °C0.0 mm11 km/hmedium
Tue 29 Sepovercast9 °C19 °C0.0 mm9 km/hmedium
Wed 30 Sepovercast10 °C17 °C0.0 mm9 km/hmedium
Thu 1 Octlight rain9 °C13 °C8.2 mm6 km/hmedium
Fri 2 Octfog8 °C13 °C0.3 mm5 km/hmedium
Sat 3 Octovercast7 °C16 °C0.0 mm8 km/hlow
DayWeatherMinMaxPrecip.WindConfidence
Sun 4 Octovercast6 °C18 °C0.0 mm6 km/h
Mon 5 Octlight drizzle7 °C15 °C0.3 mm6 km/h
Tue 6 Octsnow showers4 °C10 °C7.8 mm6 km/h
Wed 7 Octsnow showers2 °C10 °C4.5 mm5 km/h
Thu 8 Octlight drizzle1 °C12 °C0.9 mm6 km/h
Fri 9 Octlight drizzle3 °C10 °C0.9 mm5 km/h
Sat 10 Octlight drizzle2 °C10 °C0.9 mm7 km/h
Sun 11 Octlight drizzle3 °C8 °C3.3 mm11 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: beyond two weeks, only the local climatology gives a reliable trend.

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 Arosa: the most honest estimate beyond two weeks.

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