Prague or Tokyo: which climate?
Prague (Czechia) has a warm-summer humid continental climate, whereas Tokyo (Japan) has a humid subtropical 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 Prague and to Tokyo.
Tokyo is warmer than Prague by 6.5 °C in annual average: 15.3 °C against 8.8 °C.
Tokyo gets more rain than Prague: 1,376 mm per year against 647 mm.
Prague has warmed by +2.5 °C between 1940 and 2025, against +2.2 °C in Tokyo. Prague is therefore warming faster than Tokyo. Both trends are statistically significant.
Prague averages 6 hot days (≥ 30 °C) and 89 frost days per year; Tokyo averages 36 and 34.
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 | Prague | Tokyo | Difference |
|---|---|---|---|
| Mean daily temperature | 8.8 °C | 15.3 °C | +6.5 °C |
| Average daily high | 12.6 °C | 19.1 °C | +6.5 °C |
| Average daily low | 5.1 °C | 12.0 °C | +6.9 °C |
| Annual rainfall | 647 mm | 1,376 mm | +729 mm |
| Sunshine / day | 7.9 h | 8.2 h | negligible |
| Hot days (≥ 30 °C) | 6 d/yr | 36 d/yr | +30 d/yr |
| Frost days (< 0 °C) | 89 d/yr | 34 d/yr | -55 d/yr |
| Rainy days (≥ 1 mm) | 130 d/yr | 134 d/yr | negligible |
| Mean relative humidity | 76 % | 74 % | negligible |
| Average peak wind | 15.9 km/h | 19.9 km/h | +4.0 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.