Los Angeles or Oslo: which climate?
Los Angeles (United States) has a hot-summer mediterranean climate, whereas Oslo (Norway) 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 Los Angeles and to Oslo.
Los Angeles is warmer than Oslo by 12.4 °C in annual average: 17.4 °C against 5.0 °C.
Oslo gets more rain than Los Angeles: 940 mm per year against 352 mm.
Los Angeles gets 11.2 hours of sunshine per day on average, against 7.5 hours in Oslo.
Oslo has warmed by +2.8 °C between 1940 and 2025, against +1.7 °C in Los Angeles. Oslo is therefore warming faster than Los Angeles. Both trends are statistically significant.
Los Angeles averages 62 hot days (≥ 30 °C) and 1 frost days per year; Oslo averages 0 and 148.
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 | Los Angeles | Oslo | Difference |
|---|---|---|---|
| Mean daily temperature | 17.4 °C | 5.0 °C | -12.4 °C |
| Average daily high | 23.9 °C | 8.3 °C | -15.6 °C |
| Average daily low | 12.4 °C | 1.5 °C | -10.9 °C |
| Annual rainfall | 352 mm | 940 mm | +588 mm |
| Sunshine / day | 11.2 h | 7.5 h | -3.7 h |
| Hot days (≥ 30 °C) | 62 d/yr | 0 d/yr | -62 d/yr |
| Frost days (< 0 °C) | 1 d/yr | 148 d/yr | +147 d/yr |
| Rainy days (≥ 1 mm) | 31 d/yr | 133 d/yr | +102 d/yr |
| Mean relative humidity | 63 % | 79 % | +16 % |
| Average peak wind | 13.3 km/h | 13.7 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.