Guarulhos

Planning a trip or a stroll around the city of Guarulhos? Here you will find the most up-to-date weather information, including forecasts and helpful charts to help you prepare for any surprises from nature.

Guarulhos, located in Brazil, enjoys a warm and generally pleasant climate throughout the year. Average annual temperatures fluctuate only slightly, which is typical of a subequatorial or tropical climate. You won't encounter sudden temperature drops or exhausting heat here; average values usually range from 17°C to 23°C, creating comfortable conditions for visiting at any time of year.

The year in Guarulhos can be broadly divided into two main periods distinguished by the amount of rainfall and frequency of rainy days. The wetter and warmer season typically lasts from October to March. During these months, especially in January, February, and December, the number of rainy days can reach 20–24, although the total volume of rainfall remains relatively low. This suggests frequent but perhaps not too intense rain. The average temperature during this period is 21–23°C.

A drier and slightly cooler period occurs from April to September. The number of rainy days decreases significantly, reaching a minimum in July (about 3 days). Average temperatures during this time range from 17°C to 21°C, making the weather very comfortable for walks and sightseeing. Therefore, when planning your trip, it is worth considering that the likelihood of rainy days is higher in the warmer months, while the cooler season offers mostly dry weather.

The city of Guarulhos in Brazil features a warm climate throughout the year, though with noticeable seasonal temperature fluctuations. The annual average temperature range varies from about 17.0°C in July to 23.0°C in January. The hottest month is typically January, with an average temperature of 23.0°C and daytime highs reaching 27.1°C. The coolest month is July, with an average temperature of 17.0°C and nighttime lows around 11.5°C. This creates comfortable conditions for visiting the city at any time of the year, depending on personal preference.

Summer months in Guarulhos, which fall between December and March, are characterized by consistently warm and humid weather. Average monthly temperatures during this time range from 22.3°C to 23.0°C. During the day, the air warms up to 26–27°C, and at night, temperatures rarely drop below 18–19°C. High rainfall, especially in January, February, and December, contributes to increased humidity, which is typical of a tropical summer in this region.

Winter in Guarulhos, spanning June, July, and August, brings milder and cooler conditions. Average temperatures in these months stay between 17.0°C and 17.9°C. During the day, the air usually warms to a comfortable 22–23°C, but nights become noticeably fresher, with temperatures dropping to 11.5°C – 12.9°C. In the winter months, as well as during transitional periods (e.g., May, September), more significant daily temperature fluctuations are observed. The difference between daytime highs and nighttime lows can reach 9–11°C, especially in July and September, due to lower rainfall and clearer weather, which facilitates both daytime heating and nighttime cooling.

The city of Guarulhos experiences a distinct seasonality in the distribution of precipitation throughout the year. There is a clear wet season during the summer and surrounding months (December to March, as well as October–November), and a drier period characteristic of winter (April to September).

The wettest months in Guarulhos are January and February, with 8 mm of precipitation each. December is also characterized by a significant number of rainy days (21) and 6 mm of precipitation. The high number of rainy days in January (24 days) and February (20 days), with a total rainfall of 8 mm for each of these months, indicates that precipitation is frequent but mostly light, perhaps in the form of drizzle or brief light rain. Transitional months like March (5 mm, 20 rainy days), October (4 mm, 17 rainy days), and November (5 mm, 16 rainy days) also receive a notable amount of precipitation.

The dry season is most pronounced from May to July. May, June, and especially July are the driest months, with only 1 mm of precipitation each. In July, the number of rainy days is minimal—only about 3 days. April, August, and September also see low precipitation (2 mm), while the number of rainy days ranges from 7 to 10. During these months, rain becomes a rare occurrence.

When planning a trip to Guarulhos, it's important to consider its warm and humid climate with distinct rainy periods. Overall, the weather is comfortable year-round, but there are nuances to consider when packing your suitcase. Generally, there are two main periods: a warmer and wetter season from roughly October to March, and a cooler, drier one from April to September. Regardless of when you travel, be sure to pack comfortable walking shoes, sunscreen with a high SPF, and insect repellent.

From October to March, when average temperatures in Guarulhos hover around 21–23°C and highs can reach 27°C, the focus of your wardrobe should be on light and breathable clothing made of natural fabrics. T-shirts, shorts, light dresses, and skirts will be most comfortable. Since these months see the highest number of rainy days (for example, over 20 in January and December), a compact umbrella or a light raincoat will be your indispensable companions. Don't forget a hat and sunglasses for protection from the strong sun.

From April to September, the weather in Guarulhos becomes noticeably drier and slightly cooler. Average temperatures drop to 17–18°C, and minimum night and morning temperatures—especially in June and July—can reach 11–13°C. During this period, the principle of layering is ideal. Bring both light items (T-shirts, shirts) and something warmer—a light jacket, sweater, or fleece for evening walks or cooler days. Long trousers or jeans will also be quite useful. Although rainfall is significantly lower during these months, a small folding umbrella might still come in handy, particularly at the beginning and end of this period.