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Ascona vs Castries
Comparing Ascona change · Castries change
Castries is the warmer of the two — about 14°C on the annual average; Castries is the wetter, with 396 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Ascona and Castries, in everyday terms.
Summers
Summers are nearly the same
Ascona: Warm
Castries: Warm
Winters
Castries has far milder winters
Ascona: Chilly
Castries: Stays warm
Rain & snow
Castries is wetter
Ascona: Very wet
Castries: Very wet
Sky
Castries is sunnier
Ascona: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 14°C on the annual average.
Precipitation
Castries is the wetter — about 396 mm more across the year.
Clear skies
Castries has the clearer skies — the higher line.
Exact monthly numbers
Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.
Avg high (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ascona | 7 | 9 | 14 | 17 | 21 | 25 | 27 | 27 | 22 | 17 | 12 | 8 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +20 | +18 | +13 | +11 | +7 | +3 | +1 | +2 | +7 | +12 | +16 | +20 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Ascona | 7 | 9 | 14 | 17 | 21 | 25 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +20 | +18 | +13 | +11 | +7 | +3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Ascona | 27 | 27 | 22 | 17 | 12 | 8 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +1 | +2 | +7 | +12 | +16 | +20 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ascona | 1 | 2 | 5 | 9 | 12 | 16 | 18 | 18 | 14 | 10 | 6 | 2 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +24 | +23 | +20 | +18 | +14 | +11 | +9 | +10 | +14 | +17 | +21 | +24 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Ascona | 1 | 2 | 5 | 9 | 12 | 16 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +24 | +23 | +20 | +18 | +14 | +11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Ascona | 18 | 18 | 14 | 10 | 6 | 2 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +9 | +10 | +14 | +17 | +21 | +24 |
Precipitation (mm) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ascona | 66 | 61 | 75 | 138 | 178 | 172 | 158 | 158 | 165 | 150 | 167 | 80 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +48 | +14 | -9 | -48 | -64 | -38 | +58 | +133 | +59 | +97 | +76 | +69 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Ascona | 66 | 61 | 75 | 138 | 178 | 172 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +48 | +14 | -9 | -48 | -64 | -38 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Ascona | 158 | 158 | 165 | 150 | 167 | 80 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +58 | +133 | +59 | +97 | +76 | +69 |
Cloud cover (%) Ascona runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ascona | 68 | 70 | 72 | 75 | 75 | 69 | 62 | 61 | 63 | 65 | 70 | 70 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -29 | -31 | -30 | -25 | -23 | -11 | -12 | -15 | -13 | -14 | -24 | -29 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Ascona | 68 | 70 | 72 | 75 | 75 | 69 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -29 | -31 | -30 | -25 | -23 | -11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Ascona | 62 | 61 | 63 | 65 | 70 | 70 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -12 | -15 | -13 | -14 | -24 | -29 |
Relative humidity (%) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ascona | 75 | 73 | 71 | 71 | 72 | 71 | 68 | 68 | 72 | 77 | 78 | 75 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +1 | +2 | +4 | +5 | +5 | +8 | +11 | +11 | +7 | +2 | +1 | +1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Ascona | 75 | 73 | 71 | 71 | 72 | 71 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | +1 | +2 | +4 | +5 | +5 | +8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Ascona | 68 | 68 | 72 | 77 | 78 | 75 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +11 | +11 | +7 | +2 | +1 | +1 |
How both climates are changing
Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Ascona trends → · Castries trends →
Methodology & sources
Ascona
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.
Castries
Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Precipitation — 1991–2020 normals computed from 10 years of daily observations at LE Lamentin, a weather station, about 66 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.
← change Ascona · change Castries → · Ascona page · Castries page