Last updated: August 21, 2025
September in Valparaíso, Brazil showcases a delightful transition into spring, with average temperatures hovering around 27°C (80°F), peaking at a scorching 41°C (106°F) on particularly warm days. The evenings offer a refreshing contrast, dipping to a comfortable 13°C (55°F), perfect for enjoying the coastal breezes. Throughout the month, the city experiences minimal precipitation, with just 23 mm (0.9 in) falling over the course of 3 days, resulting in a relatively dry atmosphere characterized by 33% humidity. This combination of warmth and limited rain makes for ideal weather, inviting both locals and visitors to explore the vibrant culture and stunning landscapes of this coastal gem.
In September, Valparaiso begins to shake off the chill of winter, with temperatures showcasing a notable transformation. The month kicks off with a minimum of 13°C (55°F), setting the stage for a pleasant average of 27°C (80°F) and a striking peak that can reach up to 41°C (106°F). This upward trend in temperatures marks a transition towards spring, indicating a significant rise compared to the cooler winter months that precede it. Such warm weather invites locals and visitors alike to enjoy the vibrant outdoor life that Valparaiso is known for, making September an ideal time to experience the city's colorful charm as it begins to bloom again.
September in Valparaiso, Brazil, marks a subtle transition in the region's precipitation pattern. With 23 mm (0.9 in) of rain falling over just 3 days, this month signifies a slight uptick from the dry months of July and August, which experienced minimal rainfall. As the dry spell concludes, the increasing precipitation foreshadows the upcoming wet season. Compared to the wetter months of January and February, September's rainfall is relatively modest, yet it sets the stage for the more pronounced downpours anticipated in October and November. This gradual increase highlights the cyclical nature of Valparaiso's climate, drawing the curtain on winter's dryness and welcoming the vibrant spring rains ahead.
In September, Valparaiso, Brazil, experiences a notable dip in humidity, dropping to a refreshing 33%. This marks one of the lowest points of the year, following the gradual decline from the tropical highs of previous months, where humidity peaked at 85% in February. As autumn approaches, the transition becomes evident, with the air feeling significantly drier compared to the wetter summer months. This trend continues into October, where humidity decreases to 31%, creating a pleasant climate ideal for outdoor activities and exploration. As the year progresses, humidity rises again toward the end of the year, reminding residents and visitors alike of the region's shifting seasonal patterns.
As September rolls into Valparaiso, Brazil, residents and visitors experience a notable UV Index of 12, categorizing the exposure as extreme with a burn time of just 10 minutes. This month is part of a larger trend, where the UV Index remains consistently high throughout the year, peaking in the early months with a striking 16 in both January and February. Even as temperatures cool, the UV levels in late winter and early spring remain a concern, reflecting the region's intense sunlight exposure. Whether it’s the height of summer or the transitional weeks of spring, the need for sun protection is paramount in Valparaiso. For more detailed insights on UV exposure in this vibrant city, check out Valparaiso UV Index.
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As September unfolds in Valparaiso, Brazil, it brings with it a delightful 315 hours of sunshine, a notable highlight in a year that consistently showcases the region's vibrant climate. This month marks a subtle yet significant shift in daylight, falling just short of the sunnier peak of October at 318 hours. Following a summer of abundant light, with March leading the way at 338 hours, September retains a commendable amount of sunshine, setting the stage for a seamless transition into the sun-soaked days of spring. Interestingly, the month reflects a trend of stability in daylight hours, as Valparaiso enjoys a warm glow that gradually builds towards the year's sunniest months, promising the beauty of nature’s brilliance and invigorating energy.
In Valparaiso, Brazil, the month of September enjoys a commendable 68% chance of sunny weather, marking it as a favorable time for outdoor activities. As we transition from the cold of winter, which boasts a sunny probability of 81% in July, we notice a gradual decline in sunshine hours leading into the spring. However, September's sunlit days remain plentiful, comfortably outpacing many months before and after, including a significant drop to 40% in October. This trend indicates that while the year may begin and end with lower chances of sunshine, September stands out as a bright spot, making it an inviting time for visitors and locals alike to bask in the warm rays of the approaching spring.
As September unfolds in Valparaiso, Brazil, daylight begins to shift, maintaining an average of 11 hours—consistent with the preceding months of August and May. This period marks a delightful transition where daylight gradually lengthens, paving the way toward the sunnier and brighter days of October and November, which boast 12 and 13 hours of daylight, respectively. Over the course of the year, daylight duration ebbs and flows, slowly regaining strength after the shorter days of winter. In this way, September serves as a pivotal month that bridges the diminishing light of winter and the vibrant sun of the approaching summer.
As September unfolds in Valparaiso, Brazil, the winds begin to pick up, reaching an average speed of 3.0 m/s (7 mph). This marks a subtle peak as the breezes from the winter months start to taper off, transitioning smoothly into the warmer spring season. The trend shows a gradual increase from the calmer winds of winter, which hovered around 2.5-2.9 m/s in the preceding months. By the time September arrives, the mix of refreshing gusts invigorates the atmosphere, suggesting the city's vibrant coastal life is just beginning to stir awake after the cooler months. As autumn approaches, the winds settle into a comfortable rhythm, hinting at both change and stability in this picturesque port city.
Weather in Valparaiso varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Valparaiso, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather features a broad temperature range, with minimums around 13°C (55°F) and maximums reaching up to 41°C (106°F). This month is relatively dry, receiving about 23 mm (0.9 in) of precipitation over just three days, accompanied by lower humidity levels at 33%. In contrast, January presents milder temperatures, with minimums of 19°C (66°F) and maximums peaking at 37°C (99°F). However, it is significantly wetter, recording approximately 193 mm (7.6 in) of rainfall across 17 days, paired with a higher humidity of 84%. This stark contrast highlights January as a much wetter and more humid month compared to the hot and dry conditions typical of September. For more details, check out Valparaiso weather in January.
When comparing the weather in September and February, notable differences emerge. September typically boasts a wide temperature range, with minimums around 13°C (55°F) and maximums reaching up to 41°C (106°F), while averaging a comfortable 27°C (80°F). The month experiences low precipitation of only 23 mm (0.9 in) over about 3 days, accompanied by low humidity at 33%. In stark contrast, February presents a milder temperature profile, with minimums at 17°C (64°F) and maximums peaking at 36°C (97°F), averaging 26°C (79°F). However, it is significantly wetter, with a total precipitation of 157 mm (6.2 in) spread over 16 days, and high humidity levels jumping to 85%. For more detailed information on February weather, refer to Valparaiso weather in February.
In comparing the weather of September and March, September typically showcases a broader temperature range, with minimums around 13°C (55°F) and maximums soaring up to 41°C (106°F). This month tends to be quite dry, receiving only 23 mm (0.9 in) of precipitation over just 3 days, coupled with low humidity at 33%. Conversely, March presents a warmer and more humid climate, with minimum temperatures at 18°C (64°F) and maximums reaching 37°C (98°F). The month is characterized by significantly heavier rainfall, totaling 100 mm (3.9 in) over 14 days, which contributes to a high humidity level of 84%. For a detailed look at the weather patterns during this month, you can refer to Valparaiso weather in March.
In comparing the weather of September and April, September typically experiences warmer temperatures, with daily averages of 27°C (80°F) and maximums reaching up to 41°C (106°F). In contrast, April sees slightly cooler conditions, averaging 25°C (77°F) and peaking at 35°C (95°F). While September boasts lower humidity levels at 33% and minimal rainfall (23 mm over 3 days), April is characterized by significantly higher humidity at 76% and greater precipitation, totaling 61 mm across 5 days. For more detailed insights, check out Valparaiso weather in April.
In comparing the weather of September and May, September boasts significantly higher temperatures, with an average of 27°C (80°F) and a maximum reaching 41°C (106°F), while May has a more moderate average of 22°C (72°F) and a peak of 34°C (94°F). Additionally, September experiences lower humidity at 33%, compared to May's 60%, making September feel much drier despite its higher temperatures. Precipitation levels are also different, with September receiving 23 mm over 3 days, while May sees a bit more rain at 33 mm across 4 days. For a detailed look at the weather conditions during May, you can visit Valparaiso weather in May.
In comparing the weather of September and June, September features significantly higher temperatures, with an average of 27°C (80°F) and a maximum that can reach up to 41°C (106°F). In contrast, June has a cooler average of 22°C (72°F) and a maximum of 33°C (92°F). While both months experience relatively low precipitation, September sees a slightly higher amount at 23 mm (0.9 in) over three days compared to June's 16 mm (0.6 in) over just two days. Additionally, humidity is lower in September at 33%, while June experiences a higher humidity level of 48%. For more detailed information, you can check Valparaiso weather in June.
In comparing the weather between September and July, a notable shift in temperature and humidity is evident. September boasts a minimum temperature of 13°C (55°F) and an average high of 27°C (80°F), with maximums reaching up to 41°C (106°F), making it significantly warmer than July, which has a minimum of 4°C (39°F) and averages just 21°C (70°F) with a maximum of 33°C (92°F). Additionally, September experiences slightly more precipitation at 23 mm (0.9 in) over three days, while July remains notably drier with only 10 mm (0.4 in) of rain and no rainy days at all. The humidity also contrasts, as July has a higher humidity level of 44%, compared to September's 33%. For further insights, you can check Valparaiso weather in July.
In comparing the weather between August and September, September experiences noticeably warmer temperatures, with minimums of 13°C (55°F) and averages reaching up to 27°C (80°F), while August sees lower temperatures, starting at a minimum of 7°C (45°F) and an average of 22°C (73°F). The maximum temperature in September can soar to 41°C (106°F), compared to August's peak of 37°C (98°F). Both months have similar precipitation levels, with September totaling 23 mm (0.9 in) over 3 days and August slightly less at 20 mm (0.8 in) over 4 days. Humidity is also lower in September at 33%, compared to 38% in August, contributing to a drier feel. For a detailed look at weather patterns, you can check out Valparaiso weather in August.
In comparing the weather between September and October, we see a slight increase in minimum temperatures, with October starting at 15°C (60°F) compared to September's 13°C (55°F). While the average temperature remains consistent at 26°C (80°F), October's maximum temperature can reach up to 42°C (108°F), which is marginally higher than September's peak of 41°C (106°F).
However, with the transition into October, there is a significant increase in precipitation, rising from 23 mm (0.9 in) over 3 days in September to 101 mm (4.0 in) over 12 days in October. This shift results in slightly higher humidity levels, recorded at 31% in October compared to 33% in September. For those interested in more details about October's weather, you can view specific information here: Valparaiso weather in October.
In September, the weather tends to be quite warm, with average temperatures around 27°C (80°F) and a maximum reaching up to 41°C (106°F), while humidity remains relatively low at 33%. Precipitation is minimal, with only 23 mm (0.9 in) falling over three days. In contrast, November experiences slightly cooler temperatures, averaging 26°C (80°F) with a maximum of 38°C (101°F) and a notable increase in humidity at 62%. This month sees much more rain, totaling 115 mm (4.5 in) across 13 days, making November significantly wetter than September. For a detailed look at the climate specifics, check out Valparaiso weather in November.
In September, the weather is characterized by warmer temperatures, with a minimum of 13°C (55°F) and a maximum reaching up to 41°C (106°F), accompanied by low humidity at 33% and only 23 mm of precipitation over about 3 days. In contrast, December brings milder temperatures, with a minimum of 17°C (63°F) and a maximum of 36°C (98°F), but a significant increase in precipitation to 164 mm over 17 days and a higher humidity level of 82%. This shift from September's dry heat to December's wetter and more humid conditions highlights the transition into a distinct rainy season. For more details on the weather in December, check out Valparaiso weather in December.
As summer begins to fade, September in Valparaiso brings a pleasant shift in the weather compared to the sweltering heat of the preceding months. While temperatures can still reach a maximum of 41°C (106°F), the average temperature settles around a comfortable 27°C (80°F). This month experiences significantly less rainfall, with only three days of light precipitation amounting to 23 mm (0.9 in), contributing to a lower humidity level of 33%. This balance of warm days and cooler evenings makes September a delightful time to explore the vibrant surroundings. For more details on how the weather patterns evolve throughout the year, visit Valparaiso Climate.