Climate risk in Porto Alegre
Rio Grande do Sul, Brazil · 3.9M people in the urban area
What threatens Porto Alegre most
- Water stress
- High WRI Aqueduct
- Drought
- High WRI Aqueduct
- Earthquake
- Low GSHAP
Tsunamis and landslides are not rated for a single city here. Climate risk profile of Brazil
Porto Alegre had 22 days with 20 mm of rain or more in 2025.
São Paulo: 8 days.
Porto Alegre's climate in the 2050s
2041-2060 compared with 1991-2020, moderate emissions
By the 2050s, Porto Alegre's climate will still be more like its own today than any other large city's. The nearest other is Florianópolis (Brazil).
+1.1°C
Mean temperature over the year
+1.1°C
Highest in the warmest month
+1.1°C
Lowest in the coldest month
+3%
Precipitation over the year
Under high emissions, Porto Alegre would stay nearest its own climate today.
Its own climate today is 0.4 σ away. How close the match is: 2.8 σ to the climate of Florianópolis today, where under 2 is close and over 4 is no match (Mahony et al. 2017). 3 of 3 climate model runs name the same city. Seasonal temperature and rain are compared, not extremes, city heat or the sea.
Hazards at Porto Alegre
Read at the city's centre and compared with the Atlas's 630 large cities. Moderate emissions is the IPCC's scenario SSP2-4.5.
| Hazard | Porto Alegre | Among large cities | In Brazil |
|---|---|---|---|
| Hot days in 2025, over 35 °C | 18 days | Among large cities: above 65% | In Brazil: 1 of 22 |
| Tropical nights in 2025, over 20 °C | 93 days | Among large cities: above 45% | In Brazil: 17 of 22 |
| Hottest day of 2025 | 38.8°C | Among large cities: above 69% | In Brazil: 1 of 22 |
| Warming by 2050, moderate emissions | +1.3°C | Among large cities: above 6% | In Brazil: 20 of 22 |
| Days with 20 mm of rain or more in 2025 | 22 days | Among large cities: above 88% | In Brazil: 5 of 22 |
| River flood depth, 100-year event | Dry at the city centre point | ||
| Coastal flood depth, 100-year event | Dry at the city centre point | ||
| Water stress | High (40-80%) | Among large cities: above 56% | In Brazil: 1 of 22 |
| Drought risk | High | Among large cities: above 50% | In Brazil: 1 of 22 |
| Earthquake shaking, once in 475 years | 0.05 m/s² | Among large cities: above 4% | In Brazil: 6 of 22 |
| Land burned in an average year | 0% | ||
| Cyclone wind, once in 100 years | 0 m/s |
Flood depth is read in a single 1 km cell at the city's centre, in today's climate. Other parts of the city can still flood. The country page names the deepest point near a coastal city in 2080, so its figure can be higher. See how deep a river flood reaches around Porto Alegre on the live map
See the hot days around Porto Alegre on the live map
18 days © OpenStreetMap Large cities near Porto Alegre
- Florianópolis · Brazil
- Curitiba · Brazil
- Montevideo · Uruguay
- Asunción · Paraguay
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In a line
Source: Criora (criora.com), based on ECMWF, NEX-GDDP-CMIP6, WRI, IPCC, GSHAP, GFED500
APA
Criora. (2026). Porto Alegre, Brazil: climate risk profile [Data set]. Retrieved November 2, 2026, from https://criora.com/atlas/BRA/porto-alegre BibTeX
@misc{criora_atlas_BRA_porto_alegre_2026,
author = {{Criora}},
title = {Porto Alegre, Brazil: climate risk profile},
year = {2026},
url = {https://criora.com/atlas/BRA/porto-alegre},
urldate = {2026-11-02}
} Each reading stays under its source's terms; the sources are named on this page.
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