Aosta weather in July
In July, Aosta sees average daytime highs of 16°C and overnight lows near 7°C, with 95 mm of precipitation across 15.7 wet days and about 15.1 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.
Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 35% of the time in July, and the air most often feels dry.
Daylight stretches from about 15 h 30 min at the start of July to 14 h 42 min by month's end. Set against the rest of the year, July is Aosta's 1st-clearest and 3rd-windiest month. For the whole year in context, see Aosta's year-round climate.
- Daytime high
- 16°
- 1st warmest
- Overnight low
- 7°
- 12th coldest
- Precipitation
- 95 mm
- 15.7 wet days
- Daylight
- 15 h 12 min
- 5:01 AM – 8:12 PM
- Cloud cover
- 52%
- 1st clearest
- Wind
- 4 km/h
- 3rd windiest
- Solar energy
- 5.96 kWh/m²
- Travel score
- 4.6
- out of 10
- Air quality
- Moderate
- PM2.5 10.5 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in July
Day-to-day highs hold fairly steady near 16°C through the month.
A typical July day in Aosta reaches about 16°C in the afternoon and slips back to 7°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 20°C. Set against its neighbours, July runs about 3°C warmer than June and on par with August.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Avg low (°C) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 16 | 6 |
| 2 | 16 | 6 |
| 3 | 16 | 6 |
| 4 | 16 | 6 |
| 5 | 16 | 6 |
| 6 | 16 | 6 |
| 7 | 16 | 6 |
| 8 | 16 | 6 |
| 9 | 16 | 6 |
| 10 | 16 | 6 |
| 11 | 16 | 6 |
| 12 | 16 | 6 |
| 13 | 16 | 6 |
| 14 | 16 | 6 |
| 15 | 16 | 6 |
| 16 | 16 | 7 |
| 17 | 16 | 7 |
| 18 | 16 | 7 |
| 19 | 16 | 7 |
| 20 | 16 | 7 |
| 21 | 17 | 7 |
| 22 | 17 | 7 |
| 23 | 17 | 7 |
| 24 | 17 | 7 |
| 25 | 17 | 7 |
| 26 | 17 | 7 |
| 27 | 17 | 7 |
| 28 | 17 | 7 |
| 29 | 17 | 7 |
| 30 | 17 | 7 |
| 31 | 17 | 7 |
How July really feels in Aosta
Once humidity and wind are folded in, July averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
July 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 July compares with the rest of the year at a glance. July is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.
| 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 July
The sky is clear or mostly clear about 35% of the time in July, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 24% of July, with mostly cloudy or overcast conditions the remaining 40%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 58 | 58 | 58 | 58 | 58 | 58 | 57 | 57 | 57 | 58 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 62 | 61 | 60 | 60 | 60 | 60 | 60 |
| Cloudier (%) | 42 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 42 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 39 | 40 | 40 | 40 | 40 | 40 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 58 | 42 |
| 2 | 58 | 42 |
| 3 | 58 | 42 |
| 4 | 58 | 42 |
| 5 | 58 | 42 |
| 6 | 58 | 42 |
| 7 | 57 | 43 |
| 8 | 57 | 43 |
| 9 | 57 | 43 |
| 10 | 58 | 42 |
| 11 | 59 | 41 |
| 12 | 59 | 41 |
| 13 | 59 | 41 |
| 14 | 60 | 40 |
| 15 | 60 | 40 |
| 16 | 60 | 40 |
| 17 | 60 | 40 |
| 18 | 61 | 39 |
| 19 | 61 | 39 |
| 20 | 61 | 39 |
| 21 | 62 | 38 |
| 22 | 62 | 38 |
| 23 | 62 | 38 |
| 24 | 62 | 38 |
| 25 | 62 | 38 |
| 26 | 61 | 39 |
| 27 | 60 | 40 |
| 28 | 60 | 40 |
| 29 | 60 | 40 |
| 30 | 60 | 40 |
| 31 | 60 | 40 |
Chance of precipitation in July
Aosta gets around 95 mm of rain and snow over 15.7 wet days in July. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 50% and peaks near 53% on the wettest days, and about 1 day brings snow.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 52 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 51 | 50 | 49 | 49 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 50 |
| Snow chance (%) | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 52 | 3 |
| 2 | 53 | 3 |
| 3 | 53 | 3 |
| 4 | 53 | 3 |
| 5 | 53 | 4 |
| 6 | 53 | 4 |
| 7 | 53 | 4 |
| 8 | 52 | 4 |
| 9 | 52 | 4 |
| 10 | 51 | 4 |
| 11 | 50 | 4 |
| 12 | 49 | 4 |
| 13 | 49 | 4 |
| 14 | 48 | 4 |
| 15 | 48 | 4 |
| 16 | 48 | 4 |
| 17 | 48 | 4 |
| 18 | 48 | 3 |
| 19 | 48 | 3 |
| 20 | 48 | 2 |
| 21 | 48 | 2 |
| 22 | 48 | 2 |
| 23 | 49 | 1 |
| 24 | 49 | 1 |
| 25 | 49 | 1 |
| 26 | 50 | 1 |
| 27 | 50 | 1 |
| 28 | 50 | 0 |
| 29 | 50 | 0 |
| 30 | 50 | 0 |
| 31 | 50 | 0 |
Humidity in July
Most of July feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in July
Winds average 4 km/h in July.
Across July, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
| 31 | 4 | calm |
Sunrise & sunset in July
Daylight runs from about 15 h 30 min at the start of July to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 48 minutes over July. Sunrise moves from 4:50 AM to 5:17 AM, and sunset from 8:18 PM to 7:57 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 15.5 | 15.5 | 15.5 | 15.4 | 15.4 | 15.4 | 15.4 | 15.4 | 15.4 | 15.3 | 15.3 | 15.3 | 15.3 | 15.2 | 15.2 | 15.2 | 15.2 | 15.1 | 15.1 | 15.1 | 15.0 | 15.0 | 15.0 | 14.9 | 14.9 | 14.9 | 14.8 | 14.8 | 14.8 | 14.7 | 14.7 |
| Sunrise (AM) | 4:50 | 4:50 | 4:51 | 4:51 | 4:52 | 4:53 | 4:53 | 4:54 | 4:55 | 4:56 | 4:56 | 4:57 | 4:58 | 4:59 | 5:00 | 5:01 | 5:02 | 5:03 | 5:04 | 5:05 | 5:06 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:12 | 5:13 | 5:14 | 5:15 | 5:17 |
| Sunset (PM) | 8:18 | 8:18 | 8:18 | 8:18 | 8:18 | 8:17 | 8:17 | 8:16 | 8:16 | 8:16 | 8:15 | 8:15 | 8:14 | 8:13 | 8:13 | 8:12 | 8:11 | 8:10 | 8:10 | 8:09 | 8:08 | 8:07 | 8:06 | 8:05 | 8:04 | 8:03 | 8:02 | 8:01 | 7:59 | 7:58 | 7:57 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 15.5 | 4:50 | 8:18 |
| 2 | 15.5 | 4:50 | 8:18 |
| 3 | 15.5 | 4:51 | 8:18 |
| 4 | 15.4 | 4:51 | 8:18 |
| 5 | 15.4 | 4:52 | 8:18 |
| 6 | 15.4 | 4:53 | 8:17 |
| 7 | 15.4 | 4:53 | 8:17 |
| 8 | 15.4 | 4:54 | 8:16 |
| 9 | 15.4 | 4:55 | 8:16 |
| 10 | 15.3 | 4:56 | 8:16 |
| 11 | 15.3 | 4:56 | 8:15 |
| 12 | 15.3 | 4:57 | 8:15 |
| 13 | 15.3 | 4:58 | 8:14 |
| 14 | 15.2 | 4:59 | 8:13 |
| 15 | 15.2 | 5:00 | 8:13 |
| 16 | 15.2 | 5:01 | 8:12 |
| 17 | 15.2 | 5:02 | 8:11 |
| 18 | 15.1 | 5:03 | 8:10 |
| 19 | 15.1 | 5:04 | 8:10 |
| 20 | 15.1 | 5:05 | 8:09 |
| 21 | 15.0 | 5:06 | 8:08 |
| 22 | 15.0 | 5:07 | 8:07 |
| 23 | 15.0 | 5:08 | 8:06 |
| 24 | 14.9 | 5:09 | 8:05 |
| 25 | 14.9 | 5:10 | 8:04 |
| 26 | 14.9 | 5:11 | 8:03 |
| 27 | 14.8 | 5:12 | 8:02 |
| 28 | 14.8 | 5:13 | 8:01 |
| 29 | 14.8 | 5:14 | 7:59 |
| 30 | 14.7 | 5:15 | 7:58 |
| 31 | 14.7 | 5:17 | 7:57 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 5.96 kWh/m².
For context, solar energy here swings from a low near 1.55 kWh/m² to a high of 6.01 kWh/m² in June across the year — July's 5.96 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.1 | Intense |
| 2 | 6.1 | Intense |
| 3 | 6.1 | Intense |
| 4 | 6.1 | Intense |
| 5 | 6.1 | Intense |
| 6 | 6.1 | Intense |
| 7 | 6.0 | Intense |
| 8 | 6.0 | Intense |
| 9 | 6.0 | Intense |
| 10 | 6.0 | Intense |
| 11 | 6.0 | Intense |
| 12 | 6.0 | Intense |
| 13 | 6.0 | Intense |
| 14 | 6.0 | Intense |
| 15 | 6.0 | Intense |
| 16 | 6.0 | Intense |
| 17 | 6.0 | Bright |
| 18 | 6.0 | Bright |
| 19 | 6.0 | Bright |
| 20 | 6.0 | Bright |
| 21 | 5.9 | Bright |
| 22 | 5.9 | Bright |
| 23 | 5.9 | Bright |
| 24 | 5.9 | Bright |
| 25 | 5.8 | Bright |
| 26 | 5.8 | Bright |
| 27 | 5.8 | Bright |
| 28 | 5.8 | Bright |
| 29 | 5.7 | Bright |
| 30 | 5.7 | Bright |
| 31 | 5.7 | Bright |
Is July a good time to visit Aosta?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is a reasonable time to visit Aosta for sightseeing.
What to pack for Aosta in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Aosta sees daytime highs around 16°C and nights near 7°C. Pack rain gear. Worth having: a warm layer and sun protection. About 16 days see rain.
UV index in Aosta in July
Clear-sky midday UV in July peaks around 10 (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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).