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Porto Alegre, Brazil climate
Cfa Humid subtropical
Porto Alegre has a mildly seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is January with an average daily high near 31°C, while the coldest is July averaging around 10°C at night. Precipitation is fairly even year-round, totalling about 1495 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Porto Alegre climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 29 | 26 | 23 | 20 | 20 | 22 | 23 | 25 | 28 | 30 |
| Avg temp (°C) | 25 | 25 | 24 | 21 | 17 | 15 | 14 | 16 | 17 | 20 | 22 | 24 |
| Avg low (°C) | 21 | 21 | 20 | 17 | 14 | 11 | 10 | 12 | 13 | 16 | 17 | 19 |
| Precipitation (mm) | 121 | 111 | 103 | 114 | 113 | 130 | 163 | 120 | 148 | 153 | 106 | 112 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 29 | 26 | 23 | 20 |
| Avg temp (°C) | 25 | 25 | 24 | 21 | 17 | 15 |
| Avg low (°C) | 21 | 21 | 20 | 17 | 14 | 11 |
| Precipitation (mm) | 121 | 111 | 103 | 114 | 113 | 130 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 22 | 23 | 25 | 28 | 30 |
| Avg temp (°C) | 14 | 16 | 17 | 20 | 22 | 24 |
| Avg low (°C) | 10 | 12 | 13 | 16 | 17 | 19 |
| Precipitation (mm) | 163 | 120 | 148 | 153 | 106 | 112 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 59 | 57 | 57 | 58 | 62 | 59 | 57 | 62 | 64 | 56 | 57 |
| Relative humidity (%) | 78 | 78 | 78 | 80 | 84 | 86 | 86 | 85 | 84 | 83 | 80 | 79 |
| Wind speed (km/h) | 9.0 | 8.6 | 8.4 | 7.8 | 7.5 | 7.1 | 7.7 | 7.9 | 9.0 | 9.3 | 9.3 | 9.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 59 | 57 | 57 | 58 | 62 |
| Relative humidity (%) | 78 | 78 | 78 | 80 | 84 | 86 |
| Wind speed (km/h) | 9.0 | 8.6 | 8.4 | 7.8 | 7.5 | 7.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 57 | 62 | 64 | 56 | 57 |
| Relative humidity (%) | 86 | 85 | 84 | 83 | 80 | 79 |
| Wind speed (km/h) | 7.7 | 7.9 | 9.0 | 9.3 | 9.3 | 9.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from INMET, Brazil's national meteorological institute, measured at Porto Alegre, about 6 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.