Last updated: August 21, 2025
May in São Francisco, Brazil, presents a vibrant weather tapestry, where maximum temperatures can soar up to 35°C (95°F) while the average hovers around 25°C (76°F). Evenings can be refreshingly cool, with minimums dipping to 9°C (48°F). This month typically witnesses **a modest precipitation of 14 mm (0.5 in) over just 2 days, ensuring the landscape remains lush. With a humidity level at 74%, the air carries a pleasant warmth, marking May as a delightful transitional phase between seasons.
In May, São Francisco, Brazil, experiences a gentle transition in temperatures, making it an appealing time for visitors. The month starts with a cool minimum of 9°C (48°F), but quickly warms to an average of 25°C (76°F) during the day, peaking at a comfortable 35°C (95°F). This noticeable shift from the warmer months of January through April, where temperatures hover around 20°C (68°F) at night and can reach up to 38°C (100°F), introduces a more moderate climate. May stands out as a time when the warmth is more manageable, providing a perfect backdrop for outdoor activities and adventures while hinting at the milder conditions that will follow in the coming months.
In Sao Francisco, Brazil, May marks a notable shift in the region's precipitation patterns, with rainfall plummeting to just 14 mm (0.5 in) over a mere 2 days. This decline follows the wetter months of February and November, which see substantial precipitation of 183 mm (7.2 in) and 152 mm (6.0 in), respectively, revealing a clear contrast between the rainy season and the drier late-autumn period. The trend continues into June and July, where the rainfall virtually ceases, confirming May’s position as a transitional month, before the arrival of an arid winter. This sharp reduction in precipitation serves as a precursor to the nearly dry spell that characterizes the subsequent months, highlighting the distinctive dry season that defines the region's climate.
In May, humidity levels in São Francisco, Brazil drop to a comfortable 74%, reflecting a trend of decreasing moisture as the season transitions toward winter. Following the wetter months earlier in the year, where humidity peaked at 86% in March, the meteorological shift becomes evident. As summer fades into autumn, there’s a noticeable decline, with June continuing the downward trend at 72% and July further reducing to 69%. This gradual decrease not only brings relief from the mugginess of the earlier months but also sets the stage for the drier conditions that dominate the latter part of the year, culminating in a marked low of 44% humidity in October. Such fluctuations in humidity are emblematic of São Francisco’s tropical climate, influencing both local weather patterns and the daily lives of its residents.
In May, the UV Index in São Francisco, Brazil, reaches a notable level of 10, categorized as very high. This is a slight decrease from the extreme levels seen in the first four months of the year, where the UV Index peaked at 16 in January. With a burn time of just 15 minutes, May still demands caution as UV radiation remains intense, particularly as the seasons transition. This trend indicates a gradual shift into slightly less hazardous sun exposure, yet residents and visitors should remain vigilant about sun safety. For more detailed readings and updates on UV levels, check the Sao Francisco UV Index.
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As May unfolds in São Francisco, Brazil, the sun shines brightly for an impressive 312 hours, continuing a trend of abundant sunlight that began in March. This month follows closely behind April's 306 hours, showcasing the region's vibrant transition into winter. Interestingly, the average daylight hours appear to steadily increase as the year progresses; the peak of sunshine is reached in September with 336 hours. As the days grow longer, residents and visitors alike can fully embrace the warmth and beauty of the sun-soaked season, making May a delightful time to bask in the radiance of this coastal gem.
In Sao Francisco, Brazil, the month of May marks a notable increase in the likelihood of sunny weather, with a 60% chance of sunshine that stands out compared to the preceding months. This upward trend is encouraging, especially following the relatively lower probabilities in April (39%) and March (47%). As we transition into the winter months, the likelihood of sunny days continues to rise, peaking dramatically in July (86%) and maintaining a strong presence into September (78%). This seasonal pattern highlights May as a prime time for outdoor activities, as the weather starts to shift towards more consistent sunshine, making it an ideal month to enjoy the natural beauty of the region.
In Sao Francisco, Brazil, the daylight duration shows a rhythmic ebb and flow throughout the year. From January to March, residents enjoy a consistent 12 hours of sunlight, perfect for outdoor activities and gatherings. As April arrives, the sunlight slightly wanes to 11 hours, a trend that continues through to August, offering a more subdued, yet still pleasant ambiance. However, starting in September, daylight picks up again, returning to 12 hours and reaching its peak in December with an impressive 13 hours. This cyclical pattern reflects a delicate balance between the abundance of light and the tranquil charm of shorter days, making each season distinct and contributing to the vibrant lifestyle of the city’s inhabitants.
In May, Sao Francisco experiences a refreshing average wind speed of 2.3 m/s (5 mph), matching January’s breezy start to the year. This month marks the transition into slightly stronger winds, as the season gradually shifts towards the higher speeds of winter. Following a subtle decline from February's 1.9 m/s, March to April show a slight recovery, but May stands out for its consistency. As the region gears up for the blusterier months ahead, you can expect a pleasant breeze that enhances the charm of this Brazilian locale, making it ideal for outdoor activities and leisurely strolls by the water.
Weather in Sao Francisco varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Sao Francisco, focusing on differences in temperature, rainfall, humidity, and UV levels.
The weather in May and January presents distinct differences in temperature and precipitation. May typically offers milder conditions, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 35°C (95°F) and only 14 mm (0.5 in) of rainfall over 2 days. In contrast, January tends to be warmer, with temperatures ranging from a minimum of 20°C (67°F) to a maximum of 38°C (100°F) and significantly higher precipitation of 70 mm (2.7 in) spread over 8 days. Humidity levels are similar in both months, hovering around 74-76%. For more detailed information, check Sao Francisco weather in January.
When comparing the weather in May and February, a notable distinction emerges in both temperature and precipitation levels. May typically experiences milder temperatures, with averages around 25°C (76°F), and the maximum reaching 35°C (95°F), contrasted with February, which sees warmer temperatures, ranging from a minimum of 20°C (68°F) to a maximum of 38°C (101°F). While May enjoys relatively low precipitation, totaling just 14 mm (0.5 in) over about 2 days, February is characterized by significantly higher rainfall, with 183 mm (7.2 in) spread across 16 days. Additionally, February maintains a higher humidity level at 84%, compared to May's 74%. For more detailed information on February weather, you can visit Sao Francisco weather in February.
In comparing the weather between March and May, one can observe notable differences in temperature and precipitation. March features a range of temperatures from a minimum of 18°C (65°F) to a maximum of 36°C (98°F), with an average temperature of 26°C (79°F). However, it is also quite rainy, receiving 122 mm (4.8 in) of precipitation over 12 days, and has a higher humidity level at 86%. In contrast, May presents a milder climate, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 35°C (95°F) and an average of 25°C (76°F). Additionally, May is much drier, with only 14 mm (0.5 in) of precipitation falling over just 2 days and a humidity level of 74%. For a more detailed look at the weather in March, you can visit Sao Francisco weather in March.
In comparison to April, May offers slightly cooler temperatures, with a minimum of 9°C (48°F) compared to April's warmer minimum of 17°C (64°F). Both months share a maximum temperature of 35°C (95°F), but May’s average temperature is slightly lower at 25°C (76°F), whereas April averages at 26°C (79°F). Precipitation in May is notably less, with only 14 mm (0.5 in) over just 2 days, while April sees a higher total of 43 mm (1.7 in) distributed across 8 days. Additionally, humidity levels in May at 74% are lower than April's 81%. For more details on April weather, visit Sao Francisco weather in April.
May and June exhibit fairly comparable temperatures, with May experiencing a broader range; its minimum temperature dips to 9°C (48°F), while June starts at a higher minimum of 14°C (57°F). Both months have similar average temperatures of around 24-25°C (76°F). However, May is notably wetter, with 14 mm of precipitation over 2 days, whereas June boasts a drier climate, receiving only 1 mm of rain and no rainy days at all. Humidity levels are also slightly lower in June at 72%, compared to 74% in May. For more specific details, you can check Sao Francisco weather in June.
In comparing the weather of May and July, June experiences generally warmer nights with July's minimum temperature averaging around 13°C (56°F), compared to May's cooler 9°C (48°F). However, the average temperature in July is slightly lower at 23°C (74°F) than May's warmer average of 25°C (76°F). Both months have a maximum temperature that peaks at 35°C (95°F). Additionally, May sees some precipitation, averaging 14 mm (0.5 in) over 2 days, while July experiences completely dry conditions with 0 mm of precipitation over 0 days. The humidity levels are also a bit lower in July at 69% compared to 74% in May. For more detailed information, you can refer to Sao Francisco weather in July.
In comparing the weather of May and August, May typically showcases a wider range of temperatures, with lows around 9°C (48°F) and highs reaching up to 35°C (95°F), while August features milder minimum temperatures of 14°C (58°F) but similar maximums peaking at 36°C (97°F). Precipitation is more frequent in May, averaging 14 mm over two days, compared to the remarkably dry August, which only sees about 3 mm of rain across the entire month. Furthermore, humidity levels are higher in May at 74%, contrasting with the drier 64% humidity experienced in August. For more specific details about August weather, you can check Sao Francisco weather in August.
May and September showcase distinctly different weather patterns. In May, temperatures range from a cooler minimum of 9°C (48°F) to a warm maximum of 35°C (95°F), with an average temperature of 25°C (76°F). This month also experiences moderate humidity at 74% and some rainfall, totaling 14 mm (0.5 in) over about two days. In contrast, September presents a warmer climate with minimum temperatures starting at 17°C (62°F) and soaring to a peak of 40°C (104°F), averaging 28°C (82°F). The month is notably drier, with only 4 mm (0.1 in) of precipitation and no rainy days, and humidity drops significantly to 55%. For more detailed information on weather conditions, check out Sao Francisco weather in September.
May and October present distinct contrasts in weather. In May, temperatures range from a minimum of 9°C (48°F) to a pleasant average of 25°C (76°F), with maximums reaching 35°C (95°F). The month sees relatively low precipitation of 14 mm (0.5 in) over just 2 days, coupled with a high humidity level of 74%. In contrast, October experiences warmer conditions, with minimum temperatures starting at 18°C (65°F) and an average of 29°C (84°F), peaking at a remarkable 41°C (105°F). However, this month is also characterized by increased rainfall, totaling 70 mm (2.7 in) across 8 days, and a significantly lower humidity of 44%. For more details, check out Sao Francisco weather in October.
May and November present contrasting weather conditions. In May, temperatures range from a minimum of 9°C (48°F) to a maximum of 35°C (95°F), with an average of 25°C (76°F) and only 14 mm (0.5 in) of precipitation over just 2 days, resulting in relatively high humidity at 74%. In contrast, November offers warmer temperatures, with a minimum of 19°C (66°F) and a maximum reaching 40°C (103°F), averaging 26°C (79°F). However, November is significantly wetter, experiencing 152 mm (6.0 in) of rainfall across 16 days and a lower humidity of 45%. For more details, check out Sao Francisco weather in November.
In May, the weather presents a warm and pleasant atmosphere, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 35°C (95°F) and an average of 25°C (76°F). The month experiences relatively low precipitation at just 14 mm (0.5 in) over 2 days, and humidity levels are moderately high at 74%. In contrast, December boasts higher temperatures with a minimum of 19°C (66°F), an average of 26°C (79°F), and soaring highs of up to 37°C (100°F). However, December is significantly wetter, receiving 168 mm (6.6 in) of rain over 17 days, while humidity drops to 54%. For more detailed insights, you can explore the Sao Francisco weather in December.
In May, São Francisco experiences a delightful transition as temperatures gradually warm up, with enjoyable averages and pleasant highs contrasting with cooler nights. Compared to the previous months, the humidity levels remain notable, contributing to a humid yet comfortable atmosphere, while the light rainfall adds a touch of freshness to the surroundings. With only a couple of wet days, May stands out as a favorable time to explore this charming region. For a detailed overview of weather patterns throughout the year, check out Sao Francisco Climate.