Last updated: August 21, 2025
Experience the captivating January weather of São Luís, Brazil, where average temperatures hover around 27°C (80°F), with maximum highs reaching up to 29°C (85°F) and lows settling at around 24°C (75°F). This month, the island city faces a significant precipitation total of 217 mm (8.5 in), spread across 25 rainy days, which contributes to its lush landscapes. With an humidity level of 89%, the air is rich and vibrant, promising a tropical ambiance that characterizes this enchanting destination during the summer season.
In January, Sao Luis, Brazil, welcomes visitors with warm temperatures, featuring a minimum of 24°C (75°F) and an average of 27°C (80°F), peaking at a comfortable 29°C (85°F). This month marks the transition into the summer season, with consistently high readings that hold steady throughout the following months. The temperature range remains remarkably stable into February and March, with peaks often reaching 29°C (85°F), while nighttime lows dip just a degree or two. As the year progresses into April and May, the maximum temperatures rise slightly, hitting 30°C (86°F) and 30°C (87°F) respectively. The trend continues into the mid-year, with June and July showcasing maximums of 31°C (87°F) and 31°C (89°F). Interestingly, while the daytime highs exhibit a modest increase, the nighttime lows maintain a balmy 24°C (75°F), ensuring evenings remain pleasant. Overall, Sao Luis remains a warm haven, perfect for those seeking sunshine throughout the height of summer.
January in São Luís, Brazil, marks the beginning of a noticeably wet season, as the city experiences an average precipitation of 217 mm (8.5 inches) over 25 days. This sets the stage for even heavier rainfall in the following months, particularly February and March, when rainfall nearly doubles, reaching 427 mm and 483 mm respectively, and precipitation days extend to 27 and 30. The trend of increasing rainfall continues into April before tapering off in May, with amounts dropping sharply to 298 mm. This pattern showcases a distinct peak in rainfall from February to April, transitioning to significantly drier conditions as the dry season approaches in mid-year, with July and August seeing a stark reduction to 107 mm and just 37 mm respectively. Such dynamics underscore the contrast between São Luís's lush, humid summer months and its drier winter period, offering a vivid illustration of the region's tropical climate.
In January, São Luís, Brazil, experiences its peak humidity at a steamy 89%, setting the stage for a tropical ambiance that lingers through February and March, both slightly rising to 90%. As April rolls in, humidity reaches an even higher 92%, creating a sultry atmosphere before a noticeable shift begins. By June, humidity dips to 79%, continuing its decline through the summer months with July reaching a low of 64% and August dropping even further to 55%—the driest period of the year. This trend suggests a significant transition from the humid first half of the year to a much drier climate leading into the fall, where humidity begins to rise again, peaking at 78% in December, closing the year with a reminder of the tropical climate that characterizes São Luís.
In January, Sao Luis, Brazil, experiences an astonishing UV Index of 14, categorized as extreme, with a dangerously short burn time of just 10 minutes. This intensity, common in both January and February, signals the necessity for vigilance against harmful UV rays. Throughout the following months, the UV Index peaks at 16 in March, highlighting a period of elevated sun exposure that persists into April, with only a slight decrease in May to 13. As the year progresses, the UV Index gradually dips to 12 in June and further to 11 in July, before stabilizing around 13 from August to December. Overall, it's clear that while the UV Index remains consistently high, Sao Luis residents and visitors must be especially cautious during the peak months early in the year. For more insights, check the detailed information at Sao Luis UV Index.
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In January, the sun graces São Luís, Brazil, with a pleasant 237 hours of sunshine, marking the beginning of a trend that continues to evolve throughout the year. As the months progress, February offers a slight increase to 238 hours, paving the way for March to shine the brightest yet with 259 hours. The sun's embrace reaches its peak in the mid-year months, where July and August bask in extraordinary lengths of 343 and 349 hours, respectively, while October nearly matches this zenith at 350 hours. Despite a gradual decline as the year closes, the consistently high levels of sunshine reflect São Luís as a radiant destination, perfect for those seeking warmth and light throughout the seasons.
In January, the likelihood of sunny weather in São Luís, Brazil, stands at a modest 18%, making it one of the cloudier months of the year. As the seasons progress toward February, the chance of sun slightly increases to 22%, hinting at a gradual transition towards brighter days. This trend continues through April, when sunshine becomes more frequent at 25%. However, it’s in the middle of the year that residents and visitors can truly bask in the sun, with June and July boasting probabilities of 51% and 54%, respectively. The sunshine peaks in August, reaching an impressive 66%, before gradually descending into the lower percentages again by December. This clear upward trend from January to August showcases São Luís's inviting, sun-soaked potential as summer unfolds.
In Sao Luis, Brazil, January heralds the steady rhythm of daylight with an inviting 12 hours of sunshine each day, a trend that persists through February, March, April, and into August. This consistent duration cultivates an atmosphere of vibrant energy, perfect for outdoor adventures. As the year progresses into May, June, and July, daylight settles into a slightly shorter pattern, dropping to 11 hours, which adds a cozy touch to the tropical ambience. However, the balance is restored with the arrival of August, once again welcoming 12 hours of daylight that carries through the rest of the year, imparting a sense of timeless summer. This cyclical dance of daylight reflects Sao Luis's captivating charm and its ability to engage visitors year-round.
In Sao Luis, Brazil, the January winds usher in a refreshing breeze with an average speed of 5.0 m/s (11 mph), setting the tone for the month ahead. As the year progresses, the winds typically begin to calm, peaking in September with a robust 6.0 m/s (13 mph), before gradually declining toward the year’s end. Notably, February and March witness a decrease in wind speed, reflecting a transition into the calmer months. Despite this dip, the winds in October and November bring a resurgence, hinting at the playful nature of the coastal climate. By December, the winds settle at 5.5 m/s (12 mph), creating a balanced atmosphere as the year closes, encapsulating the dynamic yet gentle breezes that characterize this vibrant locale.
Weather in Sao Luis varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Sao Luis, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February present very similar temperature ranges in Sao Luis, with both months enjoying warm conditions. In January, temperatures typically range from a minimum of 24°C (75°F) to a maximum of 29°C (85°F), while February sees slightly cooler averages at 23°C (74°F) but maintains the same maximum. However, February is notably wetter, with precipitation rising to 427 mm (16.8 in) over 27 days, compared to January's 217 mm (8.5 in) across 25 days. Humidity also increases marginally, rising from 89% in January to 90% in February. For more details, you can check Sao Luis weather in February.
In comparing the weather between January and March, we observe that both months maintain similar temperature ranges, with January showing a minimum of 24°C (75°F), an average of 27°C (80°F), and a maximum of 29°C (85°F), while March registers a minimum of 24°C (75°F), an average of 26°C (80°F), and the same maximum of 29°C (85°F). However, March experiences significantly higher precipitation, totaling 483 mm (19.0 in) over 30 days compared to January's 217 mm (8.5 in) over 25 days. Additionally, humidity levels remain high in both months, with March slightly edging out January at 90% versus 89%. For more detailed insights on the weather in March, you can visit Sao Luis weather in March.
In comparing the weather between January and April, we can see some notable similarities and differences. Both months have a minimum temperature around 24°C (75-76°F) and an average temperature of 27°C (80°F). However, April tends to be slightly warmer with a maximum temperature reaching 30°C (86°F), compared to January's peak of 29°C (85°F).
When it comes to precipitation, April is significantly wetter, receiving 469 mm (18.5 inches) over 29 days, whereas January has 217 mm (8.5 inches) over 25 days. This increased rainfall in April is accompanied by a slight rise in humidity, from 89% in January to 92% in April. For more detailed information on April weather in Sao Luis, visit Sao Luis weather in April.
In January, the weather in Sao Luis features a minimum temperature of 24°C (75°F) and an average temperature of 27°C (80°F), with a maximum of 29°C (85°F). The month experiences significant rainfall, totaling 217 mm (8.5 in) spread over 25 days, accompanied by high humidity at 89%. In contrast, May sees a subtle rise in maximum temperature to 30°C (87°F), while the minimum and average temperatures remain consistent. However, precipitation increases to 298 mm (11.7 in) over 27 days, maintaining the same high humidity level of 89%. For more details on the weather conditions during this month, you can explore Sao Luis weather in May.
In January, Sao Luis experiences warm temperatures, with a minimum of 24°C (75°F) and an average high of 29°C (85°F). The month is characterized by high humidity at 89% and significant rainfall, totaling 217 mm (8.5 in) over 25 days. In contrast, June offers a slightly warmer maximum temperature of 31°C (87°F), while maintaining a similar minimum temperature of 24°C (75°F) and an average of 27°C (81°F). Precipitation is lower in June, with 161 mm (6.4 in) over 26 days, and the humidity drops to 79%. For more details, check out Sao Luis weather in June.
In January, the weather in Sao Luis is warm and humid, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 29°C (85°F) and an average of 27°C (80°F). This month experiences significant rainfall, totaling 217 mm (8.5 in) over 25 days, along with a high humidity level of 89%. In contrast, July brings slightly warmer temperatures with a minimum of 24°C (75°F), an average of 27°C (81°F), and a maximum of 31°C (89°F). Rainfall decreases to 107 mm (4.2 in) over 22 days, and the humidity drops considerably to 64%. For more detailed information on July weather, check out Sao Luis weather in July.
January and August in Sao Luis exhibit notable differences in weather patterns. January experiences a higher humidity level of 89% and significantly more rainfall, with about 217 mm (8.5 in) of precipitation over 25 days. In contrast, August sees a reduced humidity of 55% and considerably less rain, totaling just 37 mm (1.5 in) across 11 days. While both months maintain a similar temperature range, August's maximum temperature rises to 31°C (88°F), offering a slightly warmer experience than January's maximum of 29°C (85°F). For more detailed insights into August weather, you can visit Sao Luis weather in August.
In January, the weather is characterized by warmer temperatures, with minimums around 24°C (75°F) and maximums reaching up to 29°C (85°F), accompanied by high humidity at 89% and significant rainfall of 217 mm (8.5 in) over 25 days. In contrast, September offers a more pleasant experience with slightly higher minimum temperatures of 26°C (78°F) and maximums peaking at 31°C (88°F), but the humidity drops to a comfortable 51%, and rainfall is considerably less, totaling only 21 mm (0.8 in) over just 5 days. For more details on the nuances of September weather, check out Sao Luis weather in September.
In January, the weather tends to be quite humid and wet, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 29°C (85°F). This month experiences significant rainfall, averaging 217 mm over 25 days, and maintains a high humidity level of 89%.
In contrast, October offers a warmer yet drier climate, with minimum temperatures slightly higher at 25°C (78°F) and maximum temperatures reaching 30°C (87°F). Precipitation drops significantly to only 29 mm over just 8 days, and humidity decreases to a more comfortable 53%. This stark difference makes October a more pleasant month compared to the rain-soaked January. For more detailed information, check out Sao Luis weather in October.
In January, temperatures in São Luís are slightly cooler on average, with daytime highs reaching up to 29°C (85°F) and a notable humidity of 89%. However, this month also sees significantly more rainfall, totaling 217 mm (8.5 in) over approximately 25 days. In contrast, November experiences warmer temperatures, with average highs of 30°C (86°F) and lower humidity at 60%. Precipitation is also much less in November, totaling just 73 mm (2.9 in) over 12 days. For more detailed weather information, you can visit Sao Luis weather in November.
In São Luis, January and December have similar temperature ranges, with both months featuring a minimum of 24°C (75°F) and an average around 27°C (81-82°F). However, January tends to be a bit more humid, with an average humidity of 89% compared to December's 78%. Additionally, January experiences significantly more rainfall, totaling 217 mm (8.5 in) over 25 days, while December sees only 117 mm (4.6 in) over 23 days. For more detailed information, you can check Sao Luis weather in December.
In January, Sao Luis experiences a distinct shift in weather compared to other months. The combination of high humidity and substantial rainfall creates a lush and vibrant atmosphere, making it one of the wettest months of the year. While temperatures remain warm, hovering around a comfortable average of 27°C, the frequent rain showers contribute to a unique tropical feel that sets January apart from the drier months. Travelers should be prepared for the occasional downpour, but this also means the city is lush and teeming with life. For a detailed overview of what to expect throughout the year, visit Sao Luis Climate.