SeasonMapFoz do Iguaçu vs Rio de Janeiro: which is better, month by month
Rio de Janeiro beats Foz do Iguaçu in 10 of 12 months — its lead peaks in January (71 vs 51) — and they are within 3 points in July to August.
Each place is scored under the lens that suits its type — they are different kinds of destination, so the scores are each place at its own best. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Foz do Iguaçu vs Rio de Janeiro — all 12 months
| Month | Foz do Iguaçu | Rio de Janeiro | Winner | Gap |
|---|---|---|---|---|
| January | 51Dsweltering, rainy, clean air | 71Bsweltering, soaked, muggy air | Rio de Janeiro | 20 |
| February | 54Dsweltering, rainy, clean air | 73Bsweltering, soaked, poor air quality | Rio de Janeiro | 19 |
| March | 59Dsweltering, rainy, clean air | 79Bsweltering, soaked, muggy air | Rio de Janeiro | 20 |
| April | 72Bhot, rainy, clean air | 83Ahot, rainy, muggy air | Rio de Janeiro | 11 |
| May | 74Bwarm, soaked, clean air | 86Ahot, a little rain, muggy air | Rio de Janeiro | 12 |
| June | 80Awarm, rainy, clean air | 86Awarm, a little rain, muggy air | Rio de Janeiro | 6 |
| July | 87Awarm, a little rain, clean air | 87Awarm, a little rain, muggy air | Tie | 0 |
| August | 81Awarm, rainy, clean air | 83Awarm, a little rain, muggy air | Tie | 2 |
| September | 75Bhot, rainy | 88Ahot, a little rain | Rio de Janeiro | 13 |
| October | 66Chot, soaked, clean air | 78Bhot, rainy, muggy air | Rio de Janeiro | 12 |
| November | 65Csweltering, rainy, clean air | 77Bhot, soaked, muggy air | Rio de Janeiro | 12 |
| December | 55Dsweltering, soaked, clean air | 75Bsweltering, soaked, muggy air | Rio de Janeiro | 20 |
A month is a tie when the two are within 3 points. The widest gap is January (51 vs 71). Tap a month for that month's temperature, rain, humidity and air quality side by side.