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Ascona, Switzerland climate
Cfa Humid subtropical
Ascona has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 27°C, while the coldest is January averaging around 1°C at night. Around 1567 mm of precipitation falls each year, peaking in May (178 mm) and easing off in February (61 mm).
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)Ascona climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 9 | 14 | 17 | 21 | 25 | 27 | 27 | 22 | 17 | 12 | 8 |
| Avg temp (°C) | 4 | 5 | 9 | 12 | 16 | 20 | 23 | 22 | 18 | 13 | 8 | 5 |
| Avg low (°C) | 1 | 2 | 5 | 9 | 12 | 16 | 18 | 18 | 14 | 10 | 6 | 2 |
| Precipitation (mm) | 66 | 61 | 75 | 138 | 178 | 172 | 158 | 158 | 165 | 150 | 167 | 80 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 9 | 14 | 17 | 21 | 25 |
| Avg temp (°C) | 4 | 5 | 9 | 12 | 16 | 20 |
| Avg low (°C) | 1 | 2 | 5 | 9 | 12 | 16 |
| Precipitation (mm) | 66 | 61 | 75 | 138 | 178 | 172 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 22 | 17 | 12 | 8 |
| Avg temp (°C) | 23 | 22 | 18 | 13 | 8 | 5 |
| Avg low (°C) | 18 | 18 | 14 | 10 | 6 | 2 |
| Precipitation (mm) | 158 | 158 | 165 | 150 | 167 | 80 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 70 | 72 | 75 | 75 | 69 | 62 | 61 | 63 | 65 | 70 | 70 |
| Relative humidity (%) | 75 | 73 | 71 | 71 | 72 | 71 | 68 | 68 | 72 | 77 | 78 | 75 |
| Wind speed (m/s) | 1.2 | 1.3 | 1.5 | 1.5 | 1.5 | 1.4 | 1.4 | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 70 | 72 | 75 | 75 | 69 |
| Relative humidity (%) | 75 | 73 | 71 | 71 | 72 | 71 |
| Wind speed (m/s) | 1.2 | 1.3 | 1.5 | 1.5 | 1.5 | 1.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 61 | 63 | 65 | 70 | 70 |
| Relative humidity (%) | 68 | 68 | 72 | 77 | 78 | 75 |
| Wind speed (m/s) | 1.4 | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Lugano, about 22 km from the city centre.
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.