Climate and monthly weather forecastGuarujá, Brazil

The climate of Guarujá

Guarujá is a coastal Brazilian town situated within the humid subtropical climate zone indicated by its Köppen climate classification of 'Cfa'. This type of climate has no dry season and is typically characterized by high humidity and temperatures. The predominant weather patterns are determined by changes in temperature, rainfall, humidity, wind speed, and daylight hours that occur throughout the year.

The climate of Guarujá constitutes a range of temperatures throughout the whole year, typically ranging from 18.3°C (64.9°F) to 27.7°C (81.9°F). The highest temperatures generally occur at the beginning of the year, with January and February recording average highs of 27.5°C (81.5°F) and 27.7°C (81.9°F) respectively. By contrast, the lowest average temperatures, dipping to 18.3°C (64.9°F), occur in July and August.

Relative humidity levels remain consistently high year-round which is typical for a humid subtropical climate, averaging around 78% to 83%. The area receives a significant amount of rain, which fluctuates between 46mm (1.81") in August to a high of 127mm (5") in February. Average number of rainfall days varies from 11 days in July and August to 21.8 days in January.

The region sees between 10.7 hours of daylight in July to as much as 13.6 hours in December. In terms of sunshine, Guarujá sees between 7.1 hours per day in October and November, to 8.3 hours per day in February.

The best time to visit Guarujá

The best time to visit Guarujá for optimal weather conditions is between April and July. The temperature is generally moderate during these months, with average highs ranging from 22.3°C (72.1°F) to 25.2°C (77.4°F). The relative humidity during this period ranges around 78% to 79%, while the average sea temperature is comfortably warm for swimming, ranging from 20.9°C (69.6°F) to 26.4°C (79.5°F). With daylight hours ranging from 10.7 to 11.5, tourists will have sufficient daylight to explore this seaside Brazilian town.

The worst time to visit Guarujá

February could be considered less appealing for visitors due to the highest rainfall of 127mm (5"), coupled with high humidity levels at 79%. While the temperature can reach a high of 27.7°C (81.9°F), the combination of these conditions may create a somewhat stifling atmosphere.

Spring weather in Guarujá

Spring in Guarujá, from September to November, brings temperatures ranging from 19.2°C (66.6°F) to 23.9°C (75°F). Rainfall starts to increase from 60mm (2.36") in September to reach 86mm (3.39") by November. Humidity levels tend to rise infrequently, with an average of 81% to 83%. Sunshine reduces slightly from 7.4 hours per day in September to 7.1 hours per day in November.

Summer weather in Guajará

Summers in Guajará can be hot, featuring temperatures that soar from 23.9°C (75°F) in December to 27.7°C (81.9°F) in February. Rainfall reaches its peak in February with 127mm (5"), while the humidity level also rises to about 80%. That said, each day is filled with approximately 12.9 to 13.4 daylight hours, permitting ample sunlight exposure.

Autumn weather in Guarujá

Autumn extends from March to May, showcasing temperatures from 22.3°C (72.1°F) to 26.5°C (79.7°F). During this period, rainfall decreases significantly, dropping from 91mm (3.58") in March to 54mm (2.13") by May. The relative humidity drops slightly to about 78% - 79%. The daylight hours gradually decrease from 11.5 in March to 11 by May.

Winter weather in Guarujá

Winter in Guarujá persists from June to August. The temperatures during this season fall to their lowest levels, ranging from 18.3°C (64.9°F) to 22°C (71.6°F). Rainfall is also at its lowest, falling to 46mm (1.81") in August. With relative humidity at 78%, this season is generally less humid than other times of the year. Despite the chilly atmosphere, daylight hours are reasonably long, with an average range of 10.7 hours to 11.3 hours.

Weather in January

Starting the year in Guarujá, Brazil, weather conditions provide a warm and inviting atmosphere ideal for beach activities. Humidity levels remain relatively high, an inherent feature of January weather that enhances the sensation of warmth. Weather in January »

Weather in February

The weather in February seems to mirror its preceding month, presenting continuity in Guarujá's tropical climate. Cloud presence sees a slight reduction, contributing to marginally increased solar exposure. Sea temperature remains above 26°C (78.8°F), still high enough for a summertime swim in the Atlantic. Weather in February »

Weather in March

In March, Guarujá undergoes a subtle weather transformation. A modest reduction in the highest temperature is noticed, an early indicator of the approaching autumn season. March weather, however, continues to maintain the summer-like ambience with its higher humidity and sea temperatures hovering around 26°C (78.8°F). Weather in March »

Weather in April

The weather in April marks the transition from summer to autumn in Guarujá, resulting in noteworthy changes in atmospheric conditions. Temperatures continue to drop down from the summer highs, with noticeable cooler nights. Seat temperatures also follow suit, drifting slowly away from their summer highs but remaining conducive for swimming. Weather in April »

Weather in May

May witnesses a definitive entry into the autumn season as Guarujá experiences a month of transition in weather patterns, typified by further cooling. Sea temperatures also experience a drop, reducing the allure of water-based activities. Weather in May »

Weather in June

June weather in Guarujá begins to feel the influence of the southern hemisphere winter. The temperatures continue their downward drift, leading to the onset of cooler nights. The sea, too, begins to lose its earlier warmth. The mentionable feature of June’s weather is perhaps the average rainfall of 63mm (2.48"). Weather in June »

Weather in July

July offers the most pronounced departure from Guarujá's predominantly warm weather. Seasonal low temperatures reach their peak this month with an average of 18.3°C (64.9°F). Similarly, sea temperatures also bottom out, reaching their lowest average of 20.9°C (69.6°F). Weather in July »

Weather in August

As August emerges in Guarujá, a slight revival in the weather is noticed, featuring higher sea and ambient temperatures. Cloud cover decreases further, resulting in greater solar exposure. The shifts in weather elements start to set the stage for spring, with an increase in daylight hours. Weather in August »

Weather in September

The Guarujá climate in September features a definitive transition towards Spring, with elements of weather starting to swing back towards the warmer side. Ambient conditions balance nicely between the warmer days and the cooler nights, making it an ideal time for outdoor engagements. Weather in September »

Weather in October

October in Guarujá showcases a distinct move back into the tropical weather zone. The average temperature and sea temperature rise in concert, marking the city's continual transition into the warmer months. The significant rise in rainfall, reaching 64mm (2.52") in October, accompanies the raised humidity. Weather in October »

Weather in November

November witnesses a solid consolidation of Guarujá's re-entry into its quintessential tropical weather pattern. The temperatures rise further as the city fully embraces its spring gear- up for the upcoming summer. In keeping with the warmer climate, both sea and air temperatures increase in tandem, promoting a resurgence of water activities. Weather in November »

Weather in December

Guarujá decks up for the arrival of summer in December. The warmer weather conditions prevail with the temperature scaling up to the summer levels. The onset of summer is also marked by an increase in rainfall to 87mm (3.43"), accompanied by slightly higher sea temperatures. Weather in December »