London or Stockholm: which climate?
London (United Kingdom) has a temperate oceanic climate, whereas Stockholm (Sweden) 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 London and to Stockholm.
London is warmer than Stockholm by 3.8 °C in annual average: 10.2 °C against 6.4 °C.
London gets more rain than Stockholm: 615 mm per year against 562 mm.
London and Stockholm are warming at the same rate: about +1.8 °C between 1940 and 2025 on both sides.
London averages 1 hot days (≥ 30 °C) and 36 frost days per year; Stockholm averages 0 and 118.
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 | London | Stockholm | Difference |
|---|---|---|---|
| Mean daily temperature | 10.2 °C | 6.4 °C | -3.8 °C |
| Average daily high | 13.4 °C | 9.3 °C | -4.1 °C |
| Average daily low | 6.9 °C | 3.5 °C | -3.4 °C |
| Annual rainfall | 615 mm | 562 mm | -53 mm |
| Sunshine / day | 7.5 h | 7.8 h | negligible |
| Hot days (≥ 30 °C) | 1 d/yr | 0 d/yr | negligible |
| Frost days (< 0 °C) | 36 d/yr | 118 d/yr | +82 d/yr |
| Rainy days (≥ 1 mm) | 123 d/yr | 117 d/yr | -6 d/yr |
| Mean relative humidity | 80 % | 80 % | negligible |
| Average peak wind | 20.4 km/h | 18.2 km/h | negligible |
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.