At 565m, Aosta is not as chilly as the higher Alps to the north but the winters are long, with snow likely from December through to March. The ski season (peak season) for Valle d'Aosta region runs from November to as late as May, while the short summer from June to August can be warm and sunny with temperatures up to 25ºC (77ºF). Rainfall tends to be highest in spring and autumn.
| Low temp (°C) | High temp (°C) | Sunshine (hours) | Rainfall (mm) | Humidity (am) | Humidity (pm) | |
|---|---|---|---|---|---|---|
| Jan | -2 | 5 | 235 | |||
| Feb | -2 | 7 | 165 | |||
| Mar | 1 | 11 | 180 | |||
| Apr | 5 | 17 | 216 | |||
| May | 9 | 19 | 192 | |||
| Jun | 12 | 23 | 145 | |||
| Jul | 13 | 25 | 125 | |||
| Aug | 13 | 25 | 160 | |||
| Sep | 10 | 21 | 116 | |||
| Oct | 6 | 15 | 232 | |||
| Nov | 2 | 10 | 275 | |||
| Dec | -1 | 6 | 194 |
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