Last updated: August 21, 2025
Experience the vibrant May weather of São Luís, Brazil, where the average temperature hovers around 27°C (81°F), with highs reaching up to 30°C (87°F) and lows dipping to 24°C (75°F). This tropical paradise experiences significant precipitation, with 298 mm (11.7 in) of rain spread across 27 rainy days, creating a lush and vibrant landscape. Despite the showers, the humidity remains high at 89%, contributing to the city’s rich natural beauty and unique cultural experiences. Embrace the blend of warm temperatures and refreshing rain as you explore São Luís this May!
In May, Sao Luis, Brazil experiences a pleasant continuity in its tropical climate, with temperatures typically ranging from a minimum of 24°C (75°F) to a maximum of 30°C (87°F). The average temperature remains steady at 27°C (81°F), mirroring the warmth of previous months while hinting at the gradual approach of winter. This month marks a subtle rise in both minimum and maximum temperatures compared to earlier spring months, offering a perfect blend of warmth and comfort. As the rains begin to taper off, May provides an ideal atmosphere for exploring the vibrant culture and beautiful landscapes, all while enjoying the consistency of balmy coastal temperatures.
In May, São Luís experiences a significant decline in precipitation, receiving an average of 298 mm (11.7 in) over 27 days of rain. This marks a noticeable reduction from the heavier rainfall seen in the previous months of March and April, which recorded 483 mm (19.0 in) and 469 mm (18.5 in) respectively. While May still maintains a steady pattern of wet days, it paves the way for the drier months ahead, as June and July follow with much less rainfall, totaling 161 mm (6.4 in) and 107 mm (4.2 in) respectively. This shift signifies a transitional period in the region's climate, as the heavy rains of the earlier months gradually give way to a more moderate pattern, showcasing the dynamic weather of São Luís.
Tropical Sao Luis, Brazil, experiences a notable shift in humidity levels throughout the year, with May seeing a humidity of 89%, akin to the preceding months. As part of the wet season, May’s humidity dips slightly compared to the peak in April at 92%, indicating a gradual transition towards the dryer months ahead. The trend continues into June, where humidity decreases significantly to 79%, and subsequently declines further into the Summer months, reaching a milder 64% in July and 55% by August. Such fluctuations not only influence the weather but also shape the lush landscapes and vibrant ecosystems characteristic of this coastal paradise.
In May, Sao Luis, Brazil, experiences a UV Index of 13, categorizing it as extreme and maintaining a consistent burn time of just 10 minutes—a trend seen throughout the year. The UV Index remains predominantly high from January through April, peaking at 16 in March, before gradually declining to 12 in June. Despite this slight dip, the exposure remains significant, emphasizing the need for sun protection during outdoor activities. As the weather warms up in the following months, the consistent levels of UV exposure highlight the importance of vigilance against sunburns. For more details on daily UV levels, visit Sao Luis UV Index.
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In May, São Luís basks in a glorious 293 hours of sunshine, marking a delightful transition into the sun-drenched months that follow. As spring gives way to a vibrant summer atmosphere, this fifth month outshines its predecessors, boasting significantly more sunlight than January through April. The upward trend continues, with the weeks ahead promising even brighter days, peaking in July at an impressive 343 hours. This pattern of increasing daylight not only enhances the city’s lively spirit but also invites locals and tourists alike to explore the stunning coastlines and rich culture under the radiant Brazilian sun.
In Sao Luis, Brazil, the likelihood of enjoying sunny weather shows a promising upward trend as May rolls around, with a 36% chance of clear skies. This marks a significant improvement from the preceding months, particularly when compared to April's 25%. As the year progresses into the winter months, the sun seems to shine brighter, with June and July boasting chances of 51% and 54% respectively. Notably, the sunny outlook continues into the second half of the year, peaking in August at 66%. Thus, May emerges as a herald of better, brighter days ahead, inviting residents and visitors alike to revel in the beauty of the Brazilian sun.
In São Luís, Brazil, daylight duration exhibits a striking consistency throughout the year, typically hovering around 12 hours each month. From January to April, the city enjoys this generous stretch of daylight, creating ample opportunities for outdoor activities and cultural exploration. However, as May arrives, daylight dips slightly to 11 hours, a trend that continues into June and July. This subtle shift hints at the onset of winter, yet the days are still relatively bright. By August, daylight swings back to the familiar 12-hour mark, maintaining the rhythm of light and dark as the year progresses. This cyclical pattern underscores São Luís's tropical climate, where daylight remains a vital part of the local lifestyle across the seasons.
In May, São Luís experiences a noticeable dip in wind speed, with an average of 3.3 m/s (7 mph) marking it as one of the calmest months of the year. This decline is part of a broader trend that sees wind speeds gradually decrease from their peak in September at 6.0 m/s (13 mph), followed by increases again in the following months. The gentle breezes of May create a serene atmosphere, perfect for outdoor activities, contrasting sharply with the robust winds typical of the preceding and succeeding seasons. As summer approaches, residents and visitors alike can bask in this tranquil environment before the winds begin to pick up again through the latter half of the year.
Weather in Sao Luis varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Sao Luis, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of May and January, both months showcase warm temperatures, with January experiencing a slightly lower maximum of 29°C (85°F) compared to May's peak of 30°C (87°F). The average temperatures remain similar, hovering around 27°C (80°F in January and 81°F in May). However, May is notably wetter, with a substantial 298 mm (11.7 in) of rainfall over 27 days, compared to January's 217 mm (8.5 in) across 25 days. Humidity levels remain constant at 89%, creating a consistently tropical atmosphere throughout both months. For more detailed insights on January weather, you can check Sao Luis weather in January.
When comparing the weather in May to that of February, both months are characterized by warm temperatures, but May is slightly warmer with average temperatures reaching 27°C (81°F) compared to February's 26°C (80°F). In terms of precipitation, February is significantly wetter, with 427 mm (16.8 in) falling over 27 days, while May receives 298 mm (11.7 in) during the same number of days. Humidity levels are quite similar, with February at 90% and May at 89%, contributing to a consistently tropical feel throughout both months. For more details, you can refer to Sao Luis weather in February.
In comparing the weather of May and March, both months experience warm temperatures, but May tends to be slightly warmer with an average of 27°C (81°F) compared to March's average of 26°C (80°F). The minimum and maximum temperatures are also a bit higher in May, reaching up to 30°C (87°F) versus March's maximum of 29°C (85°F). However, March sees significantly more precipitation, with 483 mm (19.0 in) falling over 30 days, compared to May's 298 mm (11.7 in) over 27 days. Humidity levels are similar in both months, with March at 90% and May at 89%. For more detailed information, you can visit Sao Luis weather in March.
In comparing the weather of May and April, we can see that both months have similar temperature ranges, with minimums of around 24°C (75°F) and maximums reaching up to 30°C (87°F). However, May experiences significantly less rainfall, with 298 mm (11.7 in) of precipitation over 27 days, compared to April's 469 mm (18.5 in) over 29 days. Additionally, humidity levels are slightly lower in May at 89%, compared to April's 92%. This drop in precipitation and humidity may make May feel a bit more comfortable, making it a preferable choice for outdoor activities. For more detailed information about April's weather, you can visit Sao Luis weather in April.
In comparing the weather between May and June, both months share similar minimum and average temperatures, with May experiencing a maximum of 30°C (87°F) and June slightly warmer at 31°C (87°F). However, June sees a significant reduction in precipitation, with 161 mm (6.4 in) over 26 days compared to May's 298 mm (11.7 in) over 27 days. Additionally, humidity levels drop from 89% in May to 79% in June, making June potentially feel a bit more comfortable. For more details, check out Sao Luis weather in June.
When comparing the weather in May and July, both months feature relatively consistent temperatures, with minimums around 24°C (75°F) and average highs of 27°C (81°F). However, July tends to be slightly warmer, reaching a maximum of 31°C (89°F). A notable difference lies in precipitation: May experiences significantly higher rainfall, with 298 mm (11.7 in) over 27 days, whereas July receives only 107 mm (4.2 in) across 22 days. Additionally, humidity levels drop markedly from 89% in May to 64% in July, making the latter feel less muggy. For more details, check out Sao Luis weather in July.
In May, the weather is characterized by warm temperatures with a minimum of 24°C (75°F) and an average of 27°C (81°F), reaching up to 30°C (87°F). However, this month also brings significant rainfall, with a hefty 298 mm (11.7 in) of precipitation occurring over 27 days, leading to high humidity levels of 89%. In contrast, August sees similar minimum temperatures at 24°C (76°F) and an average of 27°C (82°F), but a slight increase in maximum temperatures to 31°C (88°F). Importantly, August is significantly drier, with only 37 mm (1.5 in) of rainfall over 11 days and a much lower humidity level of 55%. This makes August a more comfortable month in terms of weather conditions. For more details, see Sao Luis weather in August.
In May, the weather is characterized by higher humidity and significant rainfall, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (87°F) and an average of 27°C (81°F). During this month, Sao Luis experiences 298 mm (11.7 in) of precipitation over 27 days, resulting in a notably humid environment with a humidity level of 89%. In contrast, September offers a drier experience with much lower precipitation of just 21 mm (0.8 in) over 5 days. The temperature remains relatively stable, with a minimum of 26°C (78°F) and a maximum of 31°C (88°F), along with a slightly warmer average of 27°C (82°F). The significant drop in humidity to 51% makes September feel much more comfortable compared to the sweltering conditions of May. For more details on the weather in September, check Sao Luis weather in September.
May and October in Sao Luis exhibit quite distinct weather patterns despite having similar average temperatures. In May, temperatures range from a low of 24°C (75°F) to a high of 30°C (87°F), with heavy precipitation totaling 298 mm (11.7 in) over 27 days, resulting in a humid environment with 89% humidity. In contrast, October sees a slightly warmer minimum temperature of 25°C (78°F) while maintaining the same maximum, but with only 29 mm (1.1 in) of rainfall spread across just 8 days. This leads to a much drier atmosphere with a significantly lower humidity of 53%. For more detailed information, check out Sao Luis weather in October.
May and November present distinct weather characteristics, reflecting a notable shift in the climate. In May, temperatures range from a minimum of 24°C (75°F) to a maximum of 30°C (87°F), with an average of around 27°C (81°F). However, this month is marked by high humidity at 89% and significant precipitation, totaling 298 mm (11.7 in) over 27 days. In contrast, November sees slightly higher temperatures, with a minimum of 25°C (77°F), an average of 28°C (82°F), and a maximum of 30°C (86°F). The month experiences much lighter rainfall, accumulating only 73 mm (2.9 in) over 12 days, and a reduction in humidity to 60%. For more detailed information about November weather, check out Sao Luis weather in November.
May and December in Sao Luis exhibit similar temperatures, with both months averaging around 27°C (81°F). However, May is notably wetter, experiencing 298 mm (11.7 in) of precipitation over 27 days, compared to December's 117 mm (4.6 in) over 23 days. Additionally, the humidity levels in May are higher at 89%, while December's humidity is slightly lower at 78%. This results in a more humid and rain-soaked atmosphere in May, whereas December tends to offer a drier and more comfortable climate. For more detailed insights, you can check out Sao Luis weather in December.
In May, Sao Luis experiences a unique blend of warmth and humidity that sets it apart from other months. With average temperatures hovering around 27°C (81°F) and a delightful maximum of 30°C (87°F), the month offers a pleasant backdrop for outdoor activities despite its relatively high humidity of 89%. However, May is also notable for its significant rainfall, with precipitation occurring on nearly every day of the month, totaling 298 mm (11.7 in). This blend of warmth and moisture creates a lush, green landscape, making it a great time for nature enthusiasts to explore. For a deeper dive into the climatic nuances of Sao Luis, visit Sao Luis Climate.