Aosta, Italy climate
Cfb Oceanic / temperate
Aosta has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 81°F, while the coldest is January averaging around 27°F at night. Around 23 inches of precipitation falls each year, peaking in December (2.7 inches) and easing off in April (1.3 inches).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Aosta climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 41 | 46 | 57 | 64 | 71 | 78 | 81 | 80 | 71 | 62 | 50 | 41 |
| Avg temp (°F) | 34 | 37 | 46 | 53 | 60 | 67 | 70 | 68 | 61 | 53 | 42 | 34 |
| Avg low (°F) | 27 | 28 | 35 | 41 | 49 | 55 | 58 | 57 | 50 | 43 | 34 | 27 |
| Precipitation (in) | 2.1 | 1.6 | 1.5 | 1.3 | 2.0 | 1.9 | 2.4 | 2.4 | 1.5 | 1.7 | 2.0 | 2.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 41 | 46 | 57 | 64 | 71 | 78 |
| Avg temp (°F) | 34 | 37 | 46 | 53 | 60 | 67 |
| Avg low (°F) | 27 | 28 | 35 | 41 | 49 | 55 |
| Precipitation (in) | 2.1 | 1.6 | 1.5 | 1.3 | 2.0 | 1.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 81 | 80 | 71 | 62 | 50 | 41 |
| Avg temp (°F) | 70 | 68 | 61 | 53 | 42 | 34 |
| Avg low (°F) | 58 | 57 | 50 | 43 | 34 | 27 |
| Precipitation (in) | 2.4 | 2.4 | 1.5 | 1.7 | 2.0 | 2.7 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 7 | 8 | 8 | 11 | 11 | 11 | 11 | 8 | 9 | 9 | 9 |
| Days with high ≥ 90°F (days) | — | — | — | — | 0.0 | 2 | 4 | 3 | 0.1 | — | — | — |
| Days with low ≤ 32°F (days) | 25 | 21 | 10 | 1 | 0.0 | — | — | — | — | 2 | 12 | 24 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 7 | 8 | 8 | 11 | 11 |
| Days with high ≥ 90°F (days) | — | — | — | — | 0.0 | 2 |
| Days with low ≤ 32°F (days) | 25 | 21 | 10 | 1 | 0.0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 11 | 8 | 9 | 9 | 9 |
| Days with high ≥ 90°F (days) | 4 | 3 | 0.1 | — | — | — |
| Days with low ≤ 32°F (days) | — | — | — | 2 | 12 | 24 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 69 | 72 | 65 | 59 | 59 | 61 | 66 | 71 | 71 |
| Relative humidity (%) | 83 | 83 | 86 | 82 | 78 | 75 | 74 | 75 | 78 | 80 | 85 | 83 |
| Wind speed (mph) | 3.6 | 3.7 | 3.8 | 3.8 | 3.6 | 3.4 | 3.4 | 3.1 | 3.1 | 3.2 | 3.4 | 3.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 69 | 72 | 65 |
| Relative humidity (%) | 83 | 83 | 86 | 82 | 78 | 75 |
| Wind speed (mph) | 3.6 | 3.7 | 3.8 | 3.8 | 3.6 | 3.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 59 | 61 | 66 | 71 | 71 |
| Relative humidity (%) | 74 | 75 | 78 | 80 | 85 | 83 |
| Wind speed (mph) | 3.4 | 3.1 | 3.1 | 3.2 | 3.4 | 3.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Sion 2, a weather station, about 53 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.