Is Sao Paulo Getting Hotter?
The numbers don't lie. Sao Paulo's average temperature is 3.1 degrees higher than it was in the 1900s. That's based on 140 years of station data, carefully homogenised to remove artifacts from equipment changes and station relocations.
What stands out is the pace of change. Most of the warming has been concentrated in the last few decades, with the rate accelerating from the 1980s onward.
Average Annual Temperature by Decade
Sao Paulo's 3.1 degree warming is among the highest in this dataset and reflects a double hit: the urban heat island effect of a sprawling megacity of 22 million people, combined with regional climate shifts linked to ongoing Amazon deforestation. The loss of forest cover reduces evapotranspiration and disrupts the 'flying rivers' of moisture that have historically moderated temperatures across southeastern Brazil. Sao Paulo's warming is felt most acutely in its winters, which are noticeably milder than a century ago.
Sao Paulo has warmed 1.5 degrees more than the average across our global dataset of 29 cities.
Decade by Decade
| Decade | Avg Temp (C) | Change from 1900s |
|---|
How Sao Paulo Compares Globally
Among the world's major cities, Sao Paulo's warming rate places it in the upper tier. Here is how Sao Paulo stacks up against other global cities.
Key Numbers
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About This Data
Temperature data on this page comes from the Global Historical Climatology Network version 4 (GHCN v4), maintained by NOAA's National Centers for Environmental Information. GHCN v4 contains monthly mean temperature data for over 25,000 stations across the globe, with records dating back to the 18th century for some stations. The data has been quality-controlled and homogenised using the Pairwise Homogeneity Algorithm to remove artificial discontinuities from station moves, equipment changes, and observation practice changes.
Sao Paulo's primary station is Sao Paulo, with records spanning 1887-2026. The "change" figures compare each decade's average to the 1900s baseline. Note that some of the warming in large cities is attributable to the urban heat island effect rather than regional climate change alone. The figures shown here include both components, as they represent what the city actually experiences.
NASA GISTEMP analysis, which processes GHCN v4 data, is a product of NASA Goddard Institute for Space Studies. It is produced as a US Government work and is in the public domain.