Athens or Miami: which climate?
Athens (Greece) has a hot-summer mediterranean climate, whereas Miami (United States) has a tropical savanna 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 Athens and to Miami.
Miami is warmer than Athens by 6.9 °C in annual average: 24.4 °C against 17.5 °C.
Miami gets more rain than Athens: 1,041 mm per year against 364 mm.
Athens has warmed by +1.6 °C between 1940 and 2025, against +1.0 °C in Miami. Athens is therefore warming faster than Miami. Both trends are statistically significant.
Athens averages 85 hot days (≥ 30 °C) and 3 frost days per year; Miami averages 45 and 0.
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 | Athens | Miami | Difference |
|---|---|---|---|
| Mean daily temperature | 17.5 °C | 24.4 °C | +6.9 °C |
| Average daily high | 22.1 °C | 26.7 °C | +4.6 °C |
| Average daily low | 13.2 °C | 22.3 °C | +9.1 °C |
| Annual rainfall | 364 mm | 1,041 mm | +677 mm |
| Sunshine / day | 10.4 h | 10.6 h | negligible |
| Hot days (≥ 30 °C) | 85 d/yr | 45 d/yr | -40 d/yr |
| Frost days (< 0 °C) | 3 d/yr | 0 d/yr | negligible |
| Rainy days (≥ 1 mm) | 59 d/yr | 162 d/yr | +103 d/yr |
| Mean relative humidity | 64 % | 75 % | +11 % |
| Average peak wind | 15.4 km/h | 21.3 km/h | +5.9 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.