Weather forecast
Weather forecast
Issued Thursday 17 September 2026 alle 10:58
Weather forecaster Giulio Contri
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Overall situation
A weak Atlantic low-pressure system will affect the Aosta Valley between tonight and tomorrow morning; thereafter, a high-pressure system will move back into central-western Europe, likely lasting at least until the middle of next week.
Thursday 17 September 2026
Morning (from 06 to 12)
Afternoon (from 12 to 18)
Evening (from 18 to 24)
Forecast
Mostly sunny, with a few clouds along the borders and near Piedmont; clouds will increase in the afternoon, with isolated showers in the southeastern region in the evening.
Temperatures
down slightly.
Winds
3,000 m of moderate to light southwesterly winds; breezes in the valleys.
Reliability
- Freezing level: 3200m » 3600m
- Temp 1500 m: 10°C » 18°C
- Temp 3000 m: 1°C » 5°C
| Temperature | Max |
|---|---|
| Mountain | |
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | Moderate |
| Valleys | Moderate |
| Location | Min ** | Max |
|---|---|---|
| Aosta | 15 °C | 27 °C |
| Cogne | 7 °C | 18 °C |
| Courmayeur | 10 °C | 21 °C |
| Donnas | 16 °C | 23 °C |
| Gressoney | 8 °C | 18 °C |
| Cervinia | 5 °C | 14 °C |
** Temperature minime osservate alle ore 8:00 dalle stazioni periferiche.
Friday 18 September 2026
Night (from 00 to 06)
Morning (from 06 to 12)
Afternoon (from 12 to 18)
Evening (from 18 to 24)
Forecast
Scattered clouds in the morning, with isolated showers in Piedmont, followed by widespread clearing, with some cloudiness in the southeastern region.
Temperatures
Slightly lower, except for the lows in the valleys.
Winds
3,000 m, light southwesterly winds, shifting to the northwest; foehn conditions in the upper valleys.
Reliability
- Freezing level: 3000m » 3500m
- Temp 1500 m: 10°C » 16°C
- Temp 3000 m: 0°C » 4°C
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | Moderate |
| Valleys | Moderate |
| Location | Min | Max |
|---|---|---|
| Aosta | 16 °C | 25 °C |
| Cogne | 10 °C | 17 °C |
| Courmayeur | 10 °C | 20 °C |
| Donnas | 18 °C | 20 °C |
| Gressoney | 11 °C | 16 °C |
| Cervinia | 6 °C | 12 °C |
Saturday 19 September 2026
Morning (from 00 to 12)
Afternoon (from 12 to 24)
Forecast
Mostly sunny, with a few clouds in the valleys in the morning that will dissipate, and high clouds and increasing cloud cover in the southeastern region starting in the afternoon.
Temperatures
Slightly higher, except for the lows in the valleys.
Winds
Light northwesterly winds at 3,000 m; breezes in the valleys.
Reliability
- Freezing level: 3200m » 3800m
- Temp 1500 m: 9°C » 18°C
- Temp 3000 m: 1°C » 5°C
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | Moderate |
| Valleys | Moderate |
| Location | Min | Max |
|---|---|---|
| Aosta | 13 °C | 26 °C |
| Cogne | 8 °C | 18 °C |
| Courmayeur | 9 °C | 21 °C |
| Donnas | 17 °C | 22 °C |
| Gressoney | 9 °C | 17 °C |
| Cervinia | 5 °C | 14 °C |
Sunday 20 September 2026
Morning (from 00 to 12)
Afternoon (from 12 to 24)
Reliability
- Freezing level: 3600m » 4000m
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | Moderate |
| Valleys | Moderate |
Forecast
Fairly sunny, with high clouds and a few clouds over the mountains starting midday.
Temperatures
up slightly.
Winds
3,000 m: light to moderate northwesterly winds; foehn conditions in the upper valleys.
Next days
MON 21 SEP 2026
TUE 22 SEP 2026
WED 23 SEP 2026
Reliability
It will be fairly sunny through Wednesday.
* The solar ultraviolet radiation index is elaborated, starting from the weather forecast data, by Arpa Valle d'Aosta - Learn more »