Rio de Janeiro or Singapore: which climate?
Rio de Janeiro (Brazil) has a tropical monsoon climate, whereas Singapore (Singapore) has a tropical rainforest 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 Rio de Janeiro and to Singapore.
Singapore is warmer than Rio de Janeiro by 3.5 °C in annual average: 26.9 °C against 23.4 °C.
Singapore gets more rain than Rio de Janeiro: 2,098 mm per year against 1,270 mm.
Singapore gets 10.4 hours of sunshine per day on average, against 9.6 hours in Rio de Janeiro.
Rio de Janeiro has warmed by +1.5 °C between 1940 and 2025, against +0.9 °C in Singapore. Rio de Janeiro is therefore warming faster than Singapore. Both trends are statistically significant.
Rio de Janeiro averages 57 hot days (≥ 30 °C) and 0 frost days per year; Singapore averages 1 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 | Rio de Janeiro | Singapore | Difference |
|---|---|---|---|
| Mean daily temperature | 23.4 °C | 26.9 °C | +3.5 °C |
| Average daily high | 26.5 °C | 27.9 °C | +1.4 °C |
| Average daily low | 20.9 °C | 25.9 °C | +5.0 °C |
| Annual rainfall | 1,270 mm | 2,098 mm | +828 mm |
| Sunshine / day | 9.6 h | 10.4 h | +0.8 h |
| Hot days (≥ 30 °C) | 57 d/yr | 1 d/yr | -56 d/yr |
| Frost days (< 0 °C) | 0 d/yr | 0 d/yr | negligible |
| Rainy days (≥ 1 mm) | 157 d/yr | 274 d/yr | +117 d/yr |
| Mean relative humidity | 81 % | 82 % | negligible |
| Average peak wind | 16.9 km/h | 19.0 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.