Key Points
- Petrolina leads Brazil in annual sunshine hours, making “sun” a measurable local advantage.
- The same climate that looks harsh on a postcard is powering solar investment and high-value irrigated exports.
- A Top 10 ranking shows the sunniest belt is concentrated in the semi-arid Northeast, plus a few coastal hubs.
Petrolina, in the São Francisco Valley of Pernambuco, is not just “very sunny” in the casual sense. Official climate normals show it has the highest annual total of recorded bright sunshine among Brazil’s monitored locations, at 3,048.8 hours per year on the 1991–2020 benchmark.
That turns the popular “330 sunny days” line into something more concrete: a stable, long-run edge that planners, farmers, and investors can actually price.
Sun, in this part of Brazil, is not a mood. It is infrastructure.
Start with electricity. Consistent solar incidence reduces uncertainty for photovoltaic projects, and Petrolina sits inside the Northeast corridor that has become a national anchor for solar deployment.
The direct result is a chain of work that is not glamorous but is real: site preparation, installation, grid connections, maintenance crews, and the service companies that follow.
Petrolina: Brazil’s Sunshine Capital, and the Map of Opportunity It Draws. (Photo Internet reproduction)
Then there is the sector that changed the region’s global identity: irrigated fruit. The São Francisco River allows modern irrigation in a semi-arid climate, and the valley’s output has become big enough to be measured in the billions.
One widely cited 2024 benchmark for the São Francisco irrigated-perimeter system put gross production value at R$8.15 billion ($1.51 billion), with the Senador Nilo Coelho project—spanning Petrolina and nearby areas—around R$4.5 billion ($833 million).
Grapes and mangoes dominate the export story, reaching markets such as Europe and North America. A national ranking of annual sunshine hours underlines how concentrated this advantage is.
After Petrolina, the next sunniest cities include São João do Piauí (3,023.5), Santa Rita de Cássia in Bahia (3,022.0), Bom Jesus da Lapa (3,019.1), then Natal (2,979.8), Irecê (2,939.7), Barbalha (2,938.3), Piripiri (2,937.9), Teresina (2,889.9), and Aracaju (2,861.2).
The lesson is straightforward: when local rules are predictable and projects can move, natural advantages compound. When policy drifts into delay and dependency, the same sun becomes a missed opportunity.
