Guarulhos Weather in September

Mild days, changeable skies

September brings warm afternoons and cooler evenings to Guarulhos, with highs around 27°C and lows near 14°C. That makes it pleasant for a visit to Bosque Maia, a large city park, or a stroll around the Catedral Nossa Senhora da Conceição. Rain falls on about 10 days, though, and cloudy spells are common, so you'll want to keep some flexibility in your plans. September scores 9.1 out of 10 and is a good time to visit, but May to August is even better.

The rain is lighter than in October and heavier than in August, so the weather is a step down from the best months without being a problem. If you're hiking through Parque Estadual da Cantareira's Núcleo Cabuçu, pick a day when the forecast looks dry, since the trails can get slippery after rain. On wetter days, save the indoor sights or a long lunch for later.

September events and crowds

Brazil's Independence Day falls on September 7. It's a public holiday with celebrations across the country, so expect some services to change around that date. Outside the holiday, Guarulhos isn't known for a major September festival. The city feels more like a busy airport hub than an event destination, so you'll mostly be planning around the weather and getting where you need to go.

September comes right after the May-to-August stretch that's best for weather, and it's generally quieter than Brazil's summer holiday months. Airport traffic stays busy, though. You may find better value than in peak periods, but prices shift with dates and demand, so it's worth checking before you book.

A useful local tip

Mild evenings make a park visit easier than it would be on a sticky summer afternoon, which is a real perk if you're travelling with family. If you have a flight to catch, try to keep your plans close to Guarulhos, because traffic between the airport and central São Paulo can eat up your day.

At Guarulhos International Airport, the Airport Bus Service connects with central São Paulo and key city areas. Check the route before you leave the terminal, since it isn't the same as a direct airport train. And if rain catches you near Bosque Maia, look for a café nearby and order pão de queijo, Brazil's warm cheese bread.