Aosta in Summer
In summer (June, July and August), Aosta sees average daytime highs around 15°C and overnight lows near 6°C, with 287 mm of precipitation over about 46 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 11°C in early June to 15°C by late August. The sky is clear or mostly clear about 32% of the time across summer, and the air most often feels dry.
Summer is Aosta's best season of the year to visit on our travel score. For the whole year in context, see Aosta's year-round climate.
- Avg daytime high
- 15°C
- warmest season of the year
- Avg overnight low
- 6°C
- Precipitation
- 287 mm
- 46 wet days
- Avg wind
- 4 km/h
- Travel score
- 4.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Aosta in Summer
Over the season highs climb from about 11°C in early June to 15°C by late August.
A typical summer day in Aosta reaches about 15°C and drops to 6°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Aosta
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Aosta weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -6° / -12° | 100 | 11.9 | 12.8 | 8.9 | 0.0 |
| Feb | -4° / -12° | 79 | 10.9 | 12 | 10.1 | 0.0 |
| Mar | 0° / -8° | 88 | 12 | 13.2 | 11.6 | 0.0 |
| Apr | 3° / -4° | 97 | 13 | 13.3 | 13.3 | 0.0 |
| May | 8° / 0° | 112 | 16.3 | 8.2 | 14.7 | 1.1 |
| Jun | 13° / 4° | 105 | 16.7 | 2.3 | 15.4 | 3.3 |
| Jul | 16° / 7° | 95 | 15.7 | 0.8 | 15.1 | 4.6 |
| Aug | 16° / 6° | 87 | 13.9 | 0.7 | 13.9 | 4.6 |
| Sep | 12° / 3° | 89 | 12.7 | 2.9 | 12.3 | 2.9 |
| Oct | 7° / -1° | 98 | 12.4 | 7.9 | 10.7 | 0.7 |
| Nov | -0° / -7° | 124 | 13.3 | 13.6 | 9.3 | 0.0 |
| Dec | -5° / -11° | 110 | 12.7 | 13.6 | 8.5 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 32% of the time across summer.
Chance of precipitation in Summer
Aosta gets around 287 mm of rain and snow over 46 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 12 min in early June to 13 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.7 kWh/m².
Is summer a good time to visit Aosta?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Aosta for sightseeing.
What to pack for Aosta in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Aosta sees daytime highs around 15°C and nights near 6°C. Pack rain gear and sun protection. Worth having: a warm layer. About 46 days see rain.
UV index in Aosta in Summer
Clear-sky midday UV across summer averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Aosta peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 6 | 8 | 9 | 9 | 10 | 8 | 6 | 4 | 2 | 2 |
| Level | Low | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 8 | Very high |
| May | 9 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Where is Aosta?
Aosta sits at 45.7°N, 7.3°E, 583 m above sea level, in Italy. The nearest listed city is Chamonix, 40 km away.
Topography around Aosta
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Aosta.
Within 3 km, the terrain around Aosta has large variations in elevation — a maximum elevation change of 983 m around an average of 764 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 3,150 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,625 m.
The land around Aosta is covered by trees (48%), grassland (27%) and artificial surfaces (23%) within 3 km, trees (48%) and grassland (35%) within 16 km, and trees (42%) and grassland (32%) within 80 km.
Italy travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 230 V · 50 Hz
- Prices
- ≈ 69% of US
- price level, 2025
- GDP per capita
- $43,309
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 513
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Aosta (45.7376°, 7.3172°, elevation 583 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.