Last updated: August 21, 2025
September in São Francisco, Brazil, welcomes warm and inviting weather, with average temperatures hovering around 28°C (82°F). The month showcases a stunning maximum of 40°C (104°F), perfect for those seeking sunshine. With a comfortable minimum of 17°C (62°F), the evenings remain pleasant. Notably, rainfall is scarce, with only 4 mm (0.1 in) recorded over zero precipitation days, allowing ample opportunity for outdoor activities. Humidity stays at a moderate 55%, creating an enjoyable climate for both locals and visitors.
In September, São Francisco, Brazil experiences a noticeable transition in temperatures as summer approaches its peak. With a minimum of 17°C (62°F) and a comfortable average of 28°C (82°F), the city offers a warm embrace ideal for outdoor activities. The max temperature can soar to a sizzling 40°C (104°F), marking it as one of the hotter months of the year. This upward trend from August, where temperatures range from 14°C (58°F) to 36°C (97°F), highlights the region's dynamic climate as it prepares for the hotter October ahead. As the days grow longer and the sun shines brightly, September presents an inviting atmosphere that beckons both locals and visitors to enjoy the vibrant energy of this Brazilian gem.
In September, São Francisco experiences a distinct shift in its weather patterns, marked by a meager 4 mm (0.1 in) of precipitation, a slight increase from the preceding dry months. With no recorded rain days, the region continues its trend of minimal wetness, following an exceptionally parched July and August. This hints at the tail end of the dry season, as the city braces for the wetter months ahead, particularly in October when precipitation is expected to rise significantly to 70 mm (2.7 in). The gradual buildup of moisture leading into the summer months suggests an anticipation of rejuvenation in the landscape, making September a transitional moment in the climate narrative of São Francisco.
In September, São Francisco, Brazil, experiences a significant dip in humidity, dropping to a comfortable 55%. This marks a notable decline from the peak humidity levels seen in the earlier months, particularly the highs of 84% in February and 86% in March. As winter transitions to spring, the trend shows a gradual reduction in humidity from August's 64%, offering a refreshing shift for residents and visitors alike. Following this, humidity continues to decrease, reaching a low of 44% in October. This pattern highlights the region's seasonal variation, where late winter into early spring brings a more temperate climate, making September an ideal time to enjoy outdoor activities in São Francisco.
In September, the UV Index in Sao Francisco, Brazil, holds steady at 12, categorizing exposure as extreme with a burn time of just 10 minutes. This reflects a gradual shift as the region transitions from the peak summer months. Following a pattern similar to August, when the UV Index also measured 12, it's clear that late winter and early spring months maintain significant sun intensity, urging residents and visitors to prioritize skin protection. As the weather warms and September progresses into October, the UV Index is projected to rise again to 14, signaling that sun safety measures remain crucial. For more detailed insights on UV exposure, check out Sao Francisco UV Index.
UV Risk Categories
September marks a peak of sunshine bliss in São Francisco, Brazil, with 336 hours of sunlight illuminating the vibrant landscape, making it the sunniest month of the year. Following a steady upward trend from the previous months, September enjoys an impressive increase compared to August's 332 hours. The city's residents bask in this golden glow, just as the daylight begins to gently wane in October, maintaining a robust 334 hours of sunshine. As summer transitions to fall, this radiant September not only captivates the heart but also invites endless opportunities for outdoor adventures and community gatherings under the warm Brazilian sun.
As September rolls in, the likelihood of sunny weather in São Francisco, Brazil, becomes notably promising, with a 78% chance of sunshine gracing the skies. This marks a significant increase compared to the earlier months, where the sun shone only 50% of the time in January and fluctuated down to a mere 16% in February. Following the winter months, which see a gradual ascent in clear days—culminating in an impressive 86% in July—September emerges as a bright beacon in the seasonal transition. While the sunshine probability dips in October, the warmth of September is more inviting, making it an ideal time for outdoor enthusiasts and sun-seekers alike. The upward trend in sunny days adds an allure to the month, promising vibrant afternoons filled with the delightful embrace of the Brazilian sun.
As September unfolds in São Francisco, Brazil, residents enjoy a return to 12 hours of daylight, reminiscent of the longer days experienced at the start of the year. This month marks a shift from the shorter days of winter, highlighting a gradual transition toward the longer daylight hours that will peak in December. While April through August sees a steady 11 hours of daylight, the resurgence to 12 hours in September signifies not just a seasonal change, but also an invitation to embrace outdoor activities and the vibrant energy of spring. As the year progresses, daylight will continue to increase, promising longer, sun-filled days ahead.
As September arrives in São Francisco, Brazil, the wind begins to pick up, reaching an average speed of 2.9 m/s (7 mph). This noticeable increase follows the steady ascent observed from June to August, where winds gradually strengthened from 2.5 m/s (6 mph) to 3.2 m/s (7 mph). The trend displays a transition into the more invigorating breezes of early spring, setting the stage for a delightful mix of refreshing air and pleasant weather. As we move into October, the winds gently recede to 2.5 m/s (6 mph), suggesting a dynamic pattern where September stands out as a key turning point in São Francisco's seasonal wind dynamics.
Weather in Sao Francisco varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sao Francisco, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 40°C (104°F), with an average of 28°C (82°F). The month experiences minimal precipitation, with only 4 mm (0.1 in) and no rainy days, along with a humidity level of 55%. In contrast, January sees slightly higher temperatures, with a minimum of 20°C (67°F) and a maximum of 38°C (100°F), averaging 27°C (81°F). This month is significantly wetter, averaging 70 mm (2.7 in) of precipitation over 8 rainy days and a higher humidity of 76%. For more detailed weather information, check out Sao Francisco weather in January.
September and February present notably different weather patterns. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 40°C (104°F), with an average temperature of 28°C (82°F) and a dry environment featuring just 4 mm (0.1 in) of precipitation. The humidity sits at 55%, contributing to a warm and relatively comfortable climate. Conversely, February experiences higher minimum temperatures of 20°C (68°F) and a cooler average of 26°C (79°F), with peaks reaching up to 38°C (101°F). However, it is characterized by significant rainfall, totaling 183 mm (7.2 in) over 16 days, alongside increased humidity at 84%. For more detailed information, you can check Sao Francisco weather in February.
When comparing the weather between September and March, September typically boasts warmer temperatures, with an average of 28°C (82°F) and maximums reaching up to 40°C (104°F). In contrast, March features slightly cooler conditions, averaging 26°C (79°F) with a maximum of 36°C (98°F). While September remains dry with no recorded precipitation, March presents a stark contrast, delivering significant rainfall of 122 mm (4.8 in) over 12 days, leading to a much higher humidity level of 86%. For more detailed information, check out Sao Francisco weather in March.
In September, the weather is typically warmer and drier, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 40°C (104°F) and an average of 28°C (82°F). The month boasts only 4 mm of precipitation, resulting in a completely dry month. In contrast, April experiences milder temperatures, with a minimum of 17°C (64°F), an average of 26°C (79°F), and a maximum of 35°C (95°F). However, it is also wetter, receiving 43 mm (1.7 in) of rain over about 8 days, accompanied by higher humidity levels at 81%. For a closer look at April's weather specifics, you can explore Sao Francisco weather in April.
In September, the weather is considerably warmer, with average temperatures reaching 28°C (82°F) and maximums soaring up to 40°C (104°F), accompanied by relatively low humidity at 55%. Contrast this with May, where temperatures are noticeably cooler, with an average of 25°C (76°F) and maximums around 35°C (95°F), along with higher humidity levels at 74% and increased precipitation, totaling 14 mm (0.5 in) over two days. This makes May feel more humid and slightly more unpredictable in terms of weather, while September offers dry, hot conditions perfect for outdoor activities. For more detailed insights on the weather in May, you can check Sao Francisco weather in May.
In comparing the weather of September and June, September exhibits much warmer temperatures with a minimum of 17°C (62°F) and an average high of 28°C (82°F), reaching peaks of up to 40°C (104°F). In contrast, June offers slightly cooler temperatures, with a minimum of 14°C (57°F) and a maximum of 34°C (94°F), accompanied by a more comfortable average of 24°C (76°F). Despite both months experiencing minimal precipitation, September is notably drier with only 4 mm, while June has an even lighter trace of 1 mm. Additionally, September's humidity is lower at 55%, compared to June's higher humidity of 72%, making September feel relatively less muggy. For a detailed look at June weather conditions, you can check out Sao Francisco weather in June.
In September, the weather is significantly warmer with average temperatures reaching 28°C (82°F) and maximums soaring up to 40°C (104°F), whereas July experiences a more moderate climate with an average of 23°C (74°F) and maximums of 35°C (95°F). Additionally, September boasts virtually no precipitation with just 4 mm recorded, while July has completely dry conditions, with no rain at all. Humidity also differs, as July has a higher humidity level of 69%, compared to September's 55%. For a detailed look at July weather, visit Sao Francisco weather in July.
In comparison to August, September experiences notably warmer temperatures, with a minimum of 17°C (62°F) compared to August's 14°C (58°F) and an average temperature increasing to 28°C (82°F) from 25°C (78°F). The maximum temperature also rises significantly, peaking at 40°C (104°F) in September, higher than August's maximum of 36°C (97°F). Precipitation levels remain low in both months, with September receiving only 4 mm and August slightly less at 3 mm, both having no rainy days. Additionally, humidity decreases in September to 55%, down from August's 64%. For more detailed information about August weather, you can check Sao Francisco weather in August.
In September, the weather is characterized by warm temperatures, with a minimum of 17°C (62°F), averaging 28°C (82°F), and reaching highs of up to 40°C (104°F). The month sees little friction from precipitation, as it records only 4 mm (0.1 in) of rain over 0 days, resulting in a higher humidity level of 55%. In contrast, October experiences slightly warmer temperatures, with a minimum of 18°C (65°F) and an average of 29°C (84°F); however, it can peak at 41°C (105°F). Importantly, October is much wetter, with 70 mm (2.7 in) of precipitation spread over 8 days and a drop in humidity to 44%. For more detailed insights, check out the Sao Francisco weather in October.
In September, the weather is characterized by warm temperatures, with a minimum of 17°C (62°F) and an average of 28°C (82°F), reaching highs of up to 40°C (104°F). This month usually sees very little precipitation, averaging only 4 mm (0.1 in) and experiencing no rainy days, while humidity sits at a relatively comfortable 55%.
In contrast, November brings slightly cooler temperatures, with a minimum of 19°C (66°F) and an average of 26°C (79°F), though it can still hit highs of 40°C (103°F). However, November is marked by significantly higher rainfall, totaling 152 mm (6.0 in) and featuring 16 days of precipitation. The humidity drops to 45%, making the atmosphere feel a bit less muggy compared to September. For more details, you can check Sao Francisco weather in November.
In September, the weather is characterized by warmer temperatures, with averages around 28°C (82°F) and maximums reaching up to 40°C (104°F). This month experiences very little precipitation, with only 4 mm recorded over 0 days, and humidity levels hover around 55%. In contrast, December brings cooler temperatures, with an average of 26°C (79°F) and maximums capped at 37°C (100°F). However, it is a much wetter month, receiving 168 mm of rain over 17 days, while the humidity remains similar at 54%. For a more detailed look at December's weather, you can visit Sao Francisco weather in December.
September in São Francisco ushers in pleasantly warm temperatures, offering a refreshing contrast to the cooler winter months prior. With an average warmth that reaches a delightful 28°C, this month is characterized by minimal precipitation and a notable absence of rainy days, allowing for clear skies and abundant sunshine. The humidity, resting comfortably at 55%, enhances the overall comfort, making it an ideal time for outdoor activities. As summer approaches, the increasing warmth invites residents and visitors alike to revel in the bright days ahead. For more insights on seasonal trends, visit Sao Francisco Climate.