Weather in Grenoble in September
How warm is it in Grenoble in September?
In September the typical daytime high in Grenoble is 20.0 °C on average, from 22.4 °C at the start to 17.1 °C at the end of the month.
That is 4.3 °C cooler than in August and 5.0 °C warmer than in October.
The last 10 years were 1.6 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations Lyon - St Exupery (79 km), Col Du Grand St-Bernard (137 km) and Marseille Obs. Palais-Lonchamp (210 km); nearer ones count more.