Aosta

When to go: Aosta is warmest in August (24.3 °C), sunniest in July (13.9 h a day); coldest in January (4.3 °C). Month by month

Getting there

The year in Aosta

When to go

Aosta is warmest in August at 24.3 °C but brightest in July, averaging 13.9 hours of sun a day — the two do not always coincide, which is worth knowing before booking. Its coldest is January at 4.3 °C.

Three months worth booking

The same year of measurements, decided rather than tabulated. Each opens the map below on dates in that month.

Staying there

A hotel room in Italy emits about 14.3 kg CO₂e per night under UK Government 2026 factors — a country average per occupied room, not this or any particular hotel. 7 nights in one room adds roughly 100 kg — about 16.7× the carbon of one person getting there by rail from Zurich. Two sharing the room halve that share each; the journey does not halve.

How busy it gets

Valle d’Aosta/Vallée d’Aoste records 36.9 overnight stays per resident a year (4,519,068 nights in 2025). That is heavy tourist pressure — among the densest in Europe.

Eurostat, nights spent at tourist accommodation by NUTS 3 region, against resident population. Shown for context only — it plays no part in which destinations appear or in what order. Eurostat does not cover the United Kingdom after 2016, nor North Africa or the Levant at all, so this figure is absent for roughly a third of the destinations here.

Distances are great-circle. Rail assumes international rail at 0.01135 kg CO₂e per passenger-km with a 1.3× track detour allowance; flights use 0.12576 kg per passenger-km including radiative forcing. Journey times are modelled, not timetabled. Full method.