Weather forecast
Weather forecast
Issued Thursday 27 August 2026 alle 12:28
Weather forecaster Igor Torlai
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Overall situation
A low-pressure system centred off the coast of Brittany is deepening as it extends toward Spain and approaches, passing over the Alps: today, southwesterlies bring milder air at higher altitudes and unstable conditions at all levels; tomorrow, more instability bring widespread precipitation all over the day. On Saturday and Sunday, as high-pressure conditions return, conditions will be prone to a weak Foehn wind weather, before a new low-pressure system brings unsettled conditions on Monday and Tuesday. Thereafter, the synoptic flow will shift back to the northwest, bringing greater stability.
Thursday 27 August 2026
Morning (from 06 to 12)
Afternoon (from 12 to 18)
Evening (from 18 to 24)
Forecast
Cloud cover gradually dissipating, leading to partly cloudy skies in the afternoon in the valleys, especially the main one. Lingering cloud along the Piedmont border, with a few drops of rain in the mountains. Cloudier night likely, with a chance of a few drops of rain in the southern and eastern areas.
Temperatures
Lows are rising; highs are rising at higher elevations.
Winds
3,000 m: moderate to strong winds, or locally very strong, from the SW; winds from the SE in the valleys, also be moderate during the warmest hours of the day.
Reliability
- Freezing level: 4100m » 4600m
- Temp 1500 m: 14°C » 21°C
- Temp 3000 m: 6°C » 13°C
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | High |
| Valleys | Moderate |
| Location | Min | Max |
|---|---|---|
| Aosta | 20 °C | 29 °C |
| Cogne | 12 °C | 25 °C |
| Courmayeur | 16 °C | 26 °C |
| Donnas | 21 °C | 27 °C |
| Gressoney | 12 °C | 20 °C |
| Cervinia | 9 °C | 18 °C |
Warnings
strong winds Friday 28 August 2026
Night (from 00 to 06)
Morning (from 06 to 12)
Afternoon (from 12 to 18)
Evening (from 18 to 24)
Forecast
Widespread and intermittent precipitation, at first in the southeastern areas early in the morning, then spreading throughout, with chance of clearing up in the cloud between midday and mid-afternoon. More continuous rain during the early part of the night, especially in the north.
Temperatures
Except for a slight rise in low temperatures in the valleys, temperatures are generally falling, especially the highs at higher elevations.
Winds
3,000 m: strong to very strong winds from the SW, becoming moderate to locally strong, shifting to W/NW by evening; SE winds in the valleys, locally moderate.
Reliability
- Freezing level: 3600m / 4100m
- Temp 1500 m: 16°C » 20°C
- Temp 3000 m: 5°C / 8°C
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | Moderate |
| Valleys | Moderate |
| Location | Min | Max |
|---|---|---|
| Aosta | 22 °C | 28 °C |
| Cogne | 16 °C | 22 °C |
| Courmayeur | 18 °C | 25 °C |
| Donnas | 22 °C | 26 °C |
| Gressoney | 16 °C | 18 °C |
| Cervinia | 12 °C | 16 °C |
Warnings
strong winds Saturday 29 August 2026
Morning (from 00 to 12)
Afternoon (from 12 to 24)
Forecast
Mostly clear in the morning with a few clouds close to foreign border crests. The day will become partly cloudy in the afternoon due to mid-high clouds transits.
Temperatures
Low temperatures are falling.
Winds
3,000 m: moderate to light westerly winds; Föhn wind dashes in the early morning, becoming more persistent as the day progresses, and with afternoon breezes in the SE valleys.
Reliability
- Freezing level: 3300m » 3900m
- Temp 1500 m: 14°C » 20°C
- Temp 3000 m: 2°C » 6°C
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | High |
| Valleys | High |
| Location | Min | Max |
|---|---|---|
| Aosta | 17 °C | 26 °C |
| Cogne | 9 °C | 20 °C |
| Courmayeur | 10 °C | 22 °C |
| Donnas | 20 °C | 25 °C |
| Gressoney | 11 °C | 17 °C |
| Cervinia | 7 °C | 16 °C |
Sunday 30 August 2026
Morning (from 00 to 12)
Afternoon (from 12 to 24)
Reliability
- Freezing level: 4200m » 3800m
| Temperature | Min | Max |
|---|---|---|
| Mountain | ||
| Valleys |
| Solar ultraviolet radiation * | |
|---|---|
| Mountain | High |
| Valleys | High |
Forecast
Mostly sunny sky likely with scattered cumulus clouds forming over the mountains.
Temperatures
Showing a slight recovery.
Winds
3,000 m: light westerly winds, strengthening to moderate; breezy conditions in the valleys.
Next days
MON 31 AUG 2026
TUE 01 SEP 2026
WED 02 SEP 2026
Reliability
Chance of light rain on Monday, more widespread rainfalls on Tuesday; Wednesday will be more stable and sunny.
* The solar ultraviolet radiation index is elaborated, starting from the weather forecast data, by Arpa Valle d'Aosta - Learn more »