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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 88°F, while the coldest is July averaging around 51°F at night. Precipitation is fairly even year-round, totalling about 59 inches.
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 (°F) | 88 | 87 | 85 | 80 | 73 | 69 | 67 | 71 | 73 | 77 | 82 | 86 |
| Avg temp (°F) | 77 | 76 | 74 | 69 | 63 | 59 | 57 | 60 | 63 | 67 | 71 | 75 |
| Avg low (°F) | 69 | 69 | 67 | 62 | 56 | 52 | 51 | 53 | 56 | 60 | 63 | 67 |
| Precipitation (in) | 4.8 | 4.4 | 4.1 | 4.5 | 4.4 | 5.1 | 6.4 | 4.7 | 5.8 | 6.0 | 4.2 | 4.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 87 | 85 | 80 | 73 | 69 |
| Avg temp (°F) | 77 | 76 | 74 | 69 | 63 | 59 |
| Avg low (°F) | 69 | 69 | 67 | 62 | 56 | 52 |
| Precipitation (in) | 4.8 | 4.4 | 4.1 | 4.5 | 4.4 | 5.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 67 | 71 | 73 | 77 | 82 | 86 |
| Avg temp (°F) | 57 | 60 | 63 | 67 | 71 | 75 |
| Avg low (°F) | 51 | 53 | 56 | 60 | 63 | 67 |
| Precipitation (in) | 6.4 | 4.7 | 5.8 | 6.0 | 4.2 | 4.4 |
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 (mph) | 5.6 | 5.4 | 5.2 | 4.9 | 4.6 | 4.4 | 4.8 | 4.9 | 5.6 | 5.7 | 5.8 | 5.7 |
| 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 (mph) | 5.6 | 5.4 | 5.2 | 4.9 | 4.6 | 4.4 |
| 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 (mph) | 4.8 | 4.9 | 5.6 | 5.7 | 5.8 | 5.7 |
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.