Last updated: August 21, 2025
In Mongagua, Brazil, September brings a mix of warmth and humidity that defines the seasonal transition. With maximum temperatures reaching a sweltering 37°C (99°F) and an average of 21°C (70°F), the days can be quite hot, while evenings cool down to a minimum of 12°C (54°F). Rainfall contributes to the local climate, with 85 mm (3.3 in) of precipitation over 13 days, often adding a refreshing touch to the tropical atmosphere. The high humidity level of 78% enhances the richness of the environment, making September a month of vibrant weather contrasts that reflects the charm of this coastal destination.
In September, Mongagua, Brazil, begins to transition from the cooler winter months into warmer spring temperatures. With a minimum temperature of 12°C (54°F) and an average of 21°C (70°F), the weather is starting to warm up, making it an ideal time for outdoor activities. The maximum temperature can soar up to 37°C (99°F), reminiscent of the typically hotter months following September. This gradual rise reflects a clear trend of warming, as seen in the preceding months, with temperatures steadily increasing from July’s lows, which dipped to 7°C (44°F). Overall, September offers a blend of refreshing breezes and sunnier days, inviting locals and travelers alike to enjoy the vibrant atmosphere of this coastal town.
In September, Mongaguá experiences a notable change in its precipitation patterns, with a total of 85 mm (3.3 in) of rain spread across 13 days. This marks a decline compared to the wetter months of earlier in the year, such as January and February, when the rainfall reached over 300 mm. As the region transitions into the drier months, the precipitation tapers off significantly from the earlier peak in March, which recorded 281 mm (11.1 in). The relatively lighter rainfall in September not only reflects the ongoing adjustment towards the drier season but also signals a brief respite from the heavy downpours that characterize the earlier part of the year, setting the stage for the upcoming fluctuations in the fall months ahead.
In Mongagua, Brazil, September marks a notable transition in humidity, as levels maintain a stable 78%, similar to the drier August. This period of relative dryness comes after a gradual decline from the year's peak humidity in January at 89%. From a high in the earlier months, the humidity steadily decreases, showcasing a trend towards more comfortable conditions as the city shifts into the warmer spring season. Interestingly, this month sets the stage for a further drop in October, where humidity is expected to reach 76%, before climbing again in late fall. Overall, September's humidity reflects a balancing act in Mongagua's climate, highlighting the shift from the sweltering summer months to a more temperate environment.
As summer approaches in Mongagua, Brazil, the UV Index shows a notable shift in September, reaching 11 and falling into the extreme exposure category, with a burn time of just 10 minutes. This trend marks a return to intense sun exposure following the slightly milder conditions of the winter months, which exhibited a lower UV Index of 6 in both June and July. Comparatively, September's UV levels are similar to those of April, suggesting that sun safety precautions are essential as the days grow longer and sunnier. As always, it's vital to stay informed and protect your skin during these months of heightened UV levels. For more details, visit Mongagua UV Index.
UV Risk Categories
September in Mongaguá, Brazil, shines with 274 hours of glorious sunshine, continuing a steady trend of warmth and light as the seasons transition. This month's sunshine duration mirrors the vibrancy of the earlier months, particularly the peak seen in March with 298 hours, while staying comfortably above the lower figures recorded during winter, like June with its 243 hours. As the year progresses towards the summer, September's sun sets the stage for the abundant sunshine expected in the following months, making it a perfect time for beachgoers and outdoor enthusiasts to revel in the beauty of Brazilian coastal life. With the promise of 295 hours in November and a dazzling 317 hours by December, it’s clear that the days ahead will continue to dazzle with sunlight.
In Mongaguá, Brazil, the likelihood of sunny weather in September stands at 30%, marking a slight dip as the region transitions into the spring season. This figure falls below the summer peak seen in July at 55% and August at 45%, hinting that while sunny days may be scarcer, they are still a welcome treat. Interestingly, the chance of sun in September is higher than the subsequent months of October at 15% and November at 33%, suggesting that early spring could still offer pleasant beach outings before the rainy season approaches. Overall, September presents a transitional phase where occasional sunshine can brighten up the days amidst the shifting weather patterns.
In Mongagua, Brazil, September marks a transition in daylight duration, with the sun illuminating the skies for approximately 11 hours each day. This pattern reflects a gradual shift from the longer days of summer, where January enjoys up to 13 hours of daylight, to the shorter days seen in the cooler months of late autumn. As the year progresses, daylight steadily declines from February to April, before stabilizing around 10 hours during the mid-year months. Interestingly, September's daylight is consistent with the previous month, August, both offering 11 hours of vibrant sunshine. As the year continues, daylight begins to increase again in October, promising a return to the longer days that many cherish. Overall, the daylight trends in Mongagua illustrate a beautiful rhythm of seasons, with each month presenting its own unique canvas of light.
As September rolls in, Mongaguá experiences a gentle increase in wind activity, with average speeds reaching 2.3 m/s (5 mph). This slight uptick marks the transition into a breezier season, following months of relatively calm conditions. Unlike the beginning of the year, when the winds hovered around 1.6 to 1.7 m/s, the arrival of spring brings enhanced wind patterns, setting the stage for October's average of 2.7 m/s (6 mph). The consistent rise from September onwards suggests a promising shift, making it an ideal time for outdoor enthusiasts to embrace the invigorating coastal breezes that characterize this vibrant season in Brazil.
Weather in Mongagua varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mongagua, focusing on differences in temperature, rainfall, humidity, and UV levels.
The weather in September features a mild average temperature of 21°C (70°F), with minimums dipping to 12°C (54°F) and maximums reaching up to 37°C (99°F). This month sees about 85 mm (3.3 in) of precipitation over 13 days and maintains a humidity level of 78%. In contrast, January is warmer on average, with temperatures ranging from a minimum of 17°C (63°F) to an average of 26°C (79°F), and similarly peaking at 37°C (98°F). However, January experiences significantly more rainfall, with 268 mm (10.6 in) over 22 days and a higher humidity rate of 89%. For a detailed look at January weather, check out Mongagua weather in January.
September and February showcase significant differences in weather conditions. In September, temperatures range from a minimum of 12°C (54°F) to a maximum of 37°C (99°F), with an average temperature of 21°C (70°F). The month experiences about 85 mm (3.3 in) of precipitation over 13 days, with humidity at 78%. In contrast, February is notably warmer, with temperatures starting at 18°C (64°F) and averaging 25°C (77°F), while still peaking at 37°C (99°F). However, February is much wetter, receiving 302 mm (11.9 in) of rain over 22 days and higher humidity at 87%. For more details about February weather in Mongagua, you can visit Mongagua weather in February.
In comparing the weather between September and March, we see notable differences in temperature and precipitation. September has a wider temperature range, with minimums of 12°C (54°F) and maximums reaching up to 37°C (99°F), while March is generally warmer, starting at a minimum of 17°C (62°F) and peaking at 35°C (95°F). Precipitation is significantly higher in March, totaling 281 mm (11.1 in) over 23 days compared to September's 85 mm (3.3 in) over 13 days. Additionally, the humidity levels remain fairly high in both months, with March slightly surpassing September at 86% compared to 78%. For a closer look at the specifics of March weather, visit Mongagua weather in March.
September and April exhibit distinct weather patterns, with each month presenting its own unique characteristics. In September, temperatures range from a minimum of 12°C (54°F) to a maximum of 37°C (99°F), averaging around 21°C (70°F). The month experiences about 85 mm (3.3 in) of precipitation over 13 days, with humidity levels at 78%. In contrast, April shows slightly warmer conditions, with minimum temperatures at 15°C (60°F) and maximums reaching 36°C (97°F), averaging 23°C (73°F). Additionally, April has higher rainfall, totaling 139 mm (5.5 in) over 16 days and a humidity level of 84%. For more detailed insights, you can visit Mongagua weather in April.
When comparing the weather in September and May, we find that both months have a similar average temperature of around 21°C (70°F), but their extremes differ significantly. September can reach maximum temperatures of up to 37°C (99°F), making it much hotter than May, where the highest temperature rarely surpasses 31°C (88°F). Precipitation levels are also noteworthy; September experiences 85 mm (3.3 in) across 13 days, while May has more rain, totaling 119 mm (4.7 in) over 12 days. Humidity is slightly higher in May at 84%, compared to September's 78%. For a closer look at what to expect during May, check out Mongagua weather in May.
In comparing the weather of September and June, both months exhibit relatively mild average temperatures, with September slightly warmer, averaging 21°C (70°F) compared to June's 20°C (68°F). June experiences a maximum temperature of 32°C (90°F), while September can peak at a higher 37°C (99°F). Precipitation levels are quite similar, with September recording 85 mm (3.3 in) over 13 days and June slightly higher at 97 mm (3.8 in) over 11 days. Humidity levels are also comparable, with September at 78% and June a tad higher at 82%. For a detailed look at the weather conditions in June, you can refer to Mongagua weather in June.
In comparing the weather between September and July, we observe distinct differences in temperature and precipitation. September records a minimum temperature of 12°C (54°F) and can reach up to 37°C (99°F) with an average of 21°C (70°F), showcasing a warm climate overall. In contrast, July has a cooler minimum temperature of 7°C (44°F) and a maximum of 32°C (91°F), with an average of 19°C (66°F). Additionally, September experiences higher precipitation levels, with 85 mm (3.3 in) over 13 days, compared to July's 62 mm (2.4 in) over just 8 days. Humidity remains fairly consistent, with September at 78% and July at 80%. For a more detailed overview, you can check Mongagua weather in July.
In comparing the weather between September and August, we see a notable rise in temperatures. September boasts a minimum temperature of 12°C (54°F) and an average high of 37°C (99°F), compared to August's lower minimum of 10°C (51°F) and an average maximum of 34°C (93°F). Additionally, while September experiences slightly less precipitation at 85 mm (3.3 in) over 13 days, August records a total of 99 mm (3.9 in) over 11 days. Both months maintain consistent humidity levels at 78%, providing a tropical atmosphere throughout. For a closer look at August's weather, you can check Mongagua weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 12°C (54°F) to a maximum of 37°C (99°F), with an average of 21°C (70°F). This month experiences 85 mm (3.3 in) of precipitation over 13 days, alongside relatively high humidity at 78%. Conversely, October sees slightly warmer temperatures, with a minimum of 15°C (59°F) and an average of 22°C (72°F), peaking at 38°C (101°F). Precipitation rises significantly to 181 mm (7.1 in) across 19 days, while humidity remains relatively stable at 76%. For more details, check out the Mongagua weather in October.
In comparing the weather between September and November, we can observe some notable differences. September tends to be warmer, with an average temperature of 21°C (70°F) and a maximum reaching up to 37°C (99°F), while November's average temperature rises slightly to 22°C (72°F), with a maximum of 35°C (95°F). However, November experiences more precipitation, totaling 143 mm (5.6 in) over 19 days, compared to September's 85 mm (3.3 in) over 13 days. Additionally, November has a higher humidity level of 85%, while September sits at 78%. For a closer look at weather specifics in November, you can refer to Mongagua weather in November.
In comparing the weather of September and December, we notice a distinct increase in both temperature and humidity levels. September typically sees minimum temperatures of 12°C (54°F) and averages around 21°C (70°F), while December begins with a higher minimum of 16°C (61°F) and an average of 24°C (76°F). Meanwhile, September can experience scorching maximum temperatures of up to 37°C (99°F), though December still boasts a warm maximum of 35°C (95°F).
Precipitation also rises significantly from September to December, with September receiving 85 mm (3.3 in) over 13 rainy days compared to December's 193 mm (7.6 in) across 23 rainy days. This increase in precipitation is complemented by a slight uptick in humidity, from 78% in September to 87% in December. For more detailed weather information, check out Mongagua weather in December.
As September unfolds in Mongagua, the weather showcases a transition, starting to shed the cooler grip of winter. With the mercury climbing to a maximum of 37°C (99°F) and an average temperature of 21°C (70°F), it becomes warmer and more inviting, making it a perfect time for outdoor enthusiasts. However, the month is also marked by increased humidity at 78% and sporadic rain, with 13 days of precipitation totaling 85 mm. Compared to other months, September offers a noticeable blend of higher temperatures while still being susceptible to occasional rains, making it a month of dynamic weather. For a deeper understanding of Mongagua's climate, explore more at Mongagua Climate.