Cape Town or Warsaw: which climate?
Cape Town (South Africa) has a warm-summer mediterranean climate, whereas Warsaw (Poland) has a warm-summer humid continental climate, according to the Köppen-Geiger classification.
The values compared here are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme. The same method and the same period apply to Cape Town and to Warsaw.
Cape Town is warmer than Warsaw by 7.9 °C in annual average: 16.3 °C against 8.4 °C.
Warsaw gets more rain than Cape Town: 638 mm per year against 539 mm.
Cape Town gets 10.9 hours of sunshine per day on average, against 7.2 hours in Warsaw.
Warsaw has warmed by +2.4 °C between 1940 and 2025, against +0.8 °C in Cape Town. Warsaw is therefore warming faster than Cape Town. Both trends are statistically significant.
Cape Town averages 0 hot days (≥ 30 °C) and 0 frost days per year; Warsaw averages 5 and 99.
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
| Indicator | Cape Town | Warsaw | Difference |
|---|---|---|---|
| Mean daily temperature | 16.3 °C | 8.4 °C | -7.9 °C |
| Average daily high | 18.7 °C | 12.0 °C | -6.7 °C |
| Average daily low | 14.4 °C | 4.7 °C | -9.7 °C |
| Annual rainfall | 539 mm | 638 mm | +99 mm |
| Sunshine / day | 10.9 h | 7.2 h | -3.7 h |
| Hot days (≥ 30 °C) | 0 d/yr | 5 d/yr | +5 d/yr |
| Frost days (< 0 °C) | 0 d/yr | 99 d/yr | +99 d/yr |
| Rainy days (≥ 1 mm) | 77 d/yr | 131 d/yr | +54 d/yr |
| Mean relative humidity | 78 % | 78 % | negligible |
| Average peak wind | 26.3 km/h | 17.4 km/h | -8.9 km/h |
A difference is only reported when it exceeds the resolution of the data. ERA5 is a reanalysis on a grid of about 31 km: two nearby cities often fall in the same cell, and below half a degree you are reading the grid, not the climate.