Lyon or Tokyo: which climate?
Lyon (France) has a temperate oceanic 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 Lyon and to Tokyo.
Tokyo is warmer than Lyon by 4.0 °C in annual average: 15.3 °C against 11.3 °C.
Tokyo gets more rain than Lyon: 1,376 mm per year against 961 mm.
Lyon gets 8.8 hours of sunshine per day on average, against 8.2 hours in Tokyo.
Lyon has warmed by +2.5 °C between 1940 and 2025, against +2.2 °C in Tokyo. Lyon is therefore warming faster than Tokyo. Both trends are statistically significant.
Lyon averages 14 hot days (≥ 30 °C) and 54 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 | Lyon | Tokyo | Difference |
|---|---|---|---|
| Mean daily temperature | 11.3 °C | 15.3 °C | +4.0 °C |
| Average daily high | 15.6 °C | 19.1 °C | +3.5 °C |
| Average daily low | 7.3 °C | 12.0 °C | +4.7 °C |
| Annual rainfall | 961 mm | 1,376 mm | +415 mm |
| Sunshine / day | 8.8 h | 8.2 h | -0.6 h |
| Hot days (≥ 30 °C) | 14 d/yr | 36 d/yr | +22 d/yr |
| Frost days (< 0 °C) | 54 d/yr | 34 d/yr | -20 d/yr |
| Rainy days (≥ 1 mm) | 141 d/yr | 134 d/yr | -7 d/yr |
| Mean relative humidity | 75 % | 74 % | negligible |
| Average peak wind | 14.9 km/h | 19.9 km/h | +5.0 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.