Climate and monthly weather forecast
Arraial do Cabo, Brazil

Located in the geographical locale that warrants tropical weather patterns, Arraial do Cabo in Brazil stands tall under the Köppen climate classification of 'Aw'. Portraying a tropical wet and dry or savanna climate type, the weather here knows two prominent seasons, the wet and dry. Distinctive climate features include consistently high relative humidity, languishing around 80% to 82% throughout the year, and significant swings in rainfall.

Taking temperature variations into consideration, the region exhibits monthly average high temperatures in the realm from 25.4°C (77.7°F) to 35.4°C (95.7°F), indicating a reasonably warm climate all year round. At the other end of the spectrum, average low temperatures range from 17.6°C (63.7°F) to 23.1°C (73.6°F), illustrating the subtropical weather conditions. Notably, February records the highest temperatures, while July is the least hot month.

Rainfall, the deciding parameter between the wet and dry seasons, varies between 36mm (1.42") in August and peaks at 101mm (3.98") in December. Consequently, roughly corresponds to the average hours of daylight that fluctuates from a minimum of 10.7 hours in June, reaching a zenith of 13.5 hours in December. A worthy mention is the December month, being the wettest having the longest daylight hours, and almost the highest temperatures - a unique weather phenomenon in Arraial do Cabo's climate.

Assessing the impressive climate data, comfortable temperatures, coupled with lower rainfall levels, highlight the period from May to July as the most opportune window for a visit to Arraial do Cabo. During this timeframe, travelers will experience pleasant temperatures from 25.4°C (77.7°F) to 27.2°C (81°F) and comparatively less rain with the range varying between 44mm (1.73") and 69mm (2.72"). Sea temperatures stay in the comfortable zone of 22.4°C (72.3°F) and 24.7°C (76.5°F), making it ideal for water-related activities.

Contrarily, December stands out as the least favorable period for a visit. Despite boasting an impressive average of 13.5 hours of daylight, it is weighed down by being the month with the heaviest showers, crossing the 100mm (3.94") mark at 101mm (3.98") of rainfall. The high temperatures and increased rainfall amplify the relative humidity to 82%, which can lead to discomfort, particularly for visitors unaccustomed to such weather conditions.

The arrival of spring in Arraial do Cabo, from September to November, corresponds with incremental rises in average high temperatures, moving up from 27.1°C (80.8°F) to 29.5°C (85.1°F), promising comfortable warmth. While the rainfall also sees an escalation from 61mm (2.4") to 81mm (3.19") over these months, the increase in daylight hours from 12 to 13.2 compensates, providing more opportunities for outdoor pursuits.

The sun shines its brightest during the summer months of December to February, with air temperatures peaking from 29.5°C (85.1°F) to 35.4°C (95.7°F). However, this period also hosts the most rain, with precipitations peaking at 101mm (3.98") in December before receding to 44mm (1.73") by February. Sea temperatures staying steady around 25.1°C (77.2°F) to 25.8°C (78.4°F) offer a refreshing contrast to the warm land temperatures.

The transition towards autumn months, from March to May, brings a welcome relief from the heavy rainfall of the summer season. While rainfall decreases steadily from 53mm (2.09") to 69mm (2.72"), the maximal air temperatures flatten out from 30.1°C (86.2°F) to 27.2°C (81°F). The dip in daylight hours to 11 by May further enhances the slightly cooler weather during the autumns here.

Winter months of June to August exhibit the coolest climate trends with high temperatures calming down from 27.2°C (81°F) to a year low of 25.4°C (77.7°F) in July. Rainfall is at its lowest ebb during these months, dropping to a yearly low of 36mm (1.42") in August. Sea temperatures hover around the 22.3°C (72.1°F) to 22.4°C (72.3°F) mark, making a dip in the sea a cooler but still enjoyable experience. Meanwhile, the daylight hours see a slow increment from 10.7 in June to 11.3 by August. Despite being the coldest, the winter season boasts of reduced rainfall and moderate daylight, making it favorable for tourist activities.

January in Arraial do Cabo, Brazil, announces the arrival of the new year with an average high temperature of 34.2°C (93.6°F), the second highest recorded for the year. This coastal town experiences longer daylight hours during this month, providing ample opportunity to explore the local beaches and natural parks. Weather in January »

The weather in February sees a slight dip from January’s scorching temperatures, though Arraial do Cabo still bathes in the warmth under an average high of 35.4°C (95.7°F). This is the peak of summer, offering sun-loving tourists the best beach conditions. Weather in February »

March brings a transition period in Arraial do Cabo where the peak of summer fades, resulting in cooler daily highs of 30.1°C (86.2°F). The days of soaking under the sun at the beach remain delightful, albeit slightly less intense than the preceding months. Weather in March »

April in Arraia do Cabo welcomes yet cooler temperatures, averaging between 21.5°C (70.7°F) to 28.7°C (83.7°F), offering more comfort for outdoor activities. Exploring the city’s natural parks or engaging in water sports becomes more enticing as the intense summer heat mellows down. Weather in April »

Arraial do Cabo in May experiences a considerable drop in temperature, with daily averages falling from 20°C (68°F) to 27.2°C (81°F), marking the onset of winter. Despite this, the city rarely feels cold owing to its tropical locale. Weather in May »

June presents a continuation of May's weather characteristics. Lower daily highs of 26.1°C (79°F) provide a slight chill, especially during the evenings when temperatures might dip to around 18.2°C (64.8°F). Nonetheless, the mild winter allure is appealing to tourists preferring a more subtle tropical experience. Weather in June »

July welcomes the heart of winter, with Arraial do Cabo experiencing a slight drop in temperature from last month, hovering around 17.6°C (63.7°F) to 25.4°C (77.7°F). The decreased sea temperature contributes to a brilliant display of marine life, attracting wildlife photographers from around the globe. Weather in July »

Arraial do Cabo in August exhibits minimal change in the weather from July. The dry trend continues with only 36mm (1.42") of rainfall, the lowest recorded for the year. The climatic conditions favor sightseeing, especially visits to the local lighthouses and other historical monuments that the city boasts. Weather in August »

September in Arraial do Cabo witnesses a rise in temperature, signaling the onset of spring. Visitors take advantage of this period before the high heats of summer begin. Outdoor pursuits are attractive options with rainfall levels gaining momentum from the winter months. Weather in September »

In October, temperatures rise steadily in Arraial do Cabo, with an increase in average sea temperature to 22.8°C (73°F), making water-related activities favorable once again. Despite the arrival of 81mm (3.19") rainfall, a slight increase from the previous month, it mostly occurs in episodes of brief but torrential downpours. Weather in October »

November in Arraial do Cabo brings with it increasing temperatures and the gradual transition to the country's summer. Rising temperatures create a perfect ambience for beach-goers and water sports enthusiasts. Although rainfall is slightly up from the last month, it does little to discourage outdoor activities with many still flocking to this Brazilian paradise. Weather in November »

December offers the warmest sea temperature of the year at 24°C (75.2°F). Coupled with the highest rainfall record of 101mm (3.98"), it embodies the wet-and-warm character of the tropical climate in Arraial do Cabo. Despite the rain, the city vibrates with energy and cheer as locals and tourists alike immerse themselves in end-of-year festivities. Weather in December »