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15-day forecast for Allschwil

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From 27 Sep to 12 Oct in Allschwil: 2 day(s) of clear skies expected, highs from 14 to 29 °C and 47.0 mm of precipitation in total. Day-by-day table (Open-Meteo model).

DayWeatherMinMaxPrecip.WindConfidence
Todaypartly cloudy11 °C29 °C0.0 mm6 km/hmedium
Tomorrowovercast15 °C29 °C0.0 mm10 km/hhigh
Tue 29 Sepovercast12 °C27 °C0.0 mm5 km/hhigh
Wed 30 Sepovercast16 °C25 °C0.0 mm4 km/hmedium
Thu 1 Octlight rain16 °C19 °C5.1 mm3 km/hlow
Fri 2 Octfog14 °C21 °C0.0 mm8 km/hmedium
Sat 3 Octfog14 °C22 °C0.0 mm7 km/hmedium
DayWeatherMinMaxPrecip.WindConfidence
Sun 4 Octshowers15 °C17 °C27.0 mm5 km/h
Mon 5 Octdrizzle12 °C18 °C6.0 mm10 km/h
Tue 6 Octmostly sunny8 °C17 °C0.0 mm10 km/h
Wed 7 Octlight drizzle7 °C17 °C0.6 mm12 km/h
Thu 8 Octlight drizzle7 °C17 °C2.4 mm6 km/h
Fri 9 Octlight drizzle9 °C15 °C0.6 mm9 km/h
Sat 10 Octdrizzle7 °C14 °C4.8 mm4 km/h
Sun 11 Octlight drizzle9 °C19 °C0.5 mm9 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 11.1 °C in Allschwil, the November norm 6.1 °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 Allschwil: the most honest estimate beyond two weeks.

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