Last updated: August 21, 2025
In September, Fortaleza, Brazil, experiences inviting weather, characterized by a maximum temperature of 31°C (89°F) and an average of 27°C (81°F), making it ideal for beachgoers and outdoor enthusiasts. The month sees a mild minimum temperature of 24°C (75°F), perfect for comfortable evenings. With only 6 mm (0.2 in) of precipitation across just 1 day, rain is a rare interruption, allowing for plenty of sun-soaked adventures. Additionally, humidity levels at 74% add a tropical touch, creating a vibrant atmosphere that captivates both locals and travelers.
In September, temperatures in Fortaleza, Brazil exhibit a pleasantly stable pattern, typical of its tropical climate. With minimums around 24°C (75°F) and maximums reaching up to 31°C (89°F), the average remains a comfortable 27°C (81°F). This month marks a transition from the cooler trends seen in previous months, like July's low of 22°C (73°F), while still maintaining a consistent warmth that characterizes the city's weather year-round. As summer approaches, the temperatures stay invitingly warm, making September an ideal time for beachgoers and outdoor enthusiasts to enjoy the vibrant coastal lifestyle.
In September, Fortaleza experiences a dramatic decline in precipitation, with a mere 6 mm (0.2 in) of rain falling over just one day. This low volume marks a significant departure from the wetter months that precede it, where the rainfall often exceeds 200 mm and is accompanied by numerous rainy days. As the dry season settles in, September offers a brief respite, with only three days of rain recorded in August, hinting at a shift towards more arid conditions. This trend highlights the beginning of a transition as the city prepares for a drier October, underscoring Fortaleza's unique climatic patterns and providing a stark contrast to its lush, rain-soaked earlier months.
In September, Fortaleza, Brazil experiences a notable dip in humidity, reaching 74%, consistent with the trend of lower humidity levels observed in the preceding two months of August and July. This reduction marks a significant shift from the sultry highs of January through April, where humidity levels hovered around 84% to 87%. As the year transitions into the final stretch, humidity begins to stabilize, with October showing a slight uptick to 75%. This pattern indicates that while Fortaleza is often characterized by its tropical climate, September offers a brief respite from the intense moisture, making it an appealing time for both locals and visitors to enjoy the city’s vibrant outdoor life.
In September, Fortaleza experiences a UV Index of 13, maintaining its extreme exposure category, which means that just 10 minutes of sun can lead to burns. This month continues the trend observed from the previous months, with September's UV levels reflecting the high intensity typical of the region. With the UV Index tipped slightly higher than in the summer months of June and July, it’s crucial for residents and visitors alike to take precautions against harmful sun exposure. The consistent extreme ratings throughout the year emphasize the importance of sun safety in this vibrant Brazilian city. For more detailed information on this topic, visit Fortaleza UV Index.
UV Risk Categories
September in Fortaleza, Brazil, continues the trend of abundant sunshine, offering 345 hours of glorious daylight. This marks a slight dip from August's impressive 352 hours, yet remains solidly nestled in a season characterized by increasing sunlight as the year progresses. The pattern becomes even more evident as we approach October, which boasts the highest sunshine tally at 361 hours, suggesting an upward trajectory leading into the end of the year. This consistency in longer days not only enhances outdoor activities but also elevates the vibrant coastal atmosphere that Fortaleza is renowned for, making September a delightful moment to soak up the sun along the beautiful beaches.
In Fortaleza, Brazil, September stands out as a particularly sunny month, boasting a 75% chance of sunshine. This marks a noticeable increase from the earlier months, with the likelihood of clear skies climbing steadily as summer approaches. After a series of comparatively cooler and cloudier months, the shift becomes evident: from just 33% in January to August's 71%, the trend in sunny weather is unmistakable. September’s high percentage reflects the region’s transition into a vibrant season, making it an ideal time for visitors to bask in the warmth and enjoy the stunning coastal beauty of Fortaleza. As October rolls in, the sun remains a reliable companion, maintaining a 66% chance, ensuring that the sun-soaked allure lingers just a bit longer.
In Fortaleza, Brazil, September marks a return to 12 hours of daylight, mirroring the consistent brightness of the earlier months in the year. As the seasons shift from the shorter days of May to August—where daylight lingers for only 11 hours—September stands out as a bridge, restoring the rhythmic balance of light that characterizes much of Fortaleza's year. Following this pattern, the city enjoys a steady daylight duration from January through April, and then again returns to this equilibrium from October through December. This cyclical trend showcases the tropical climate's unique consistency, inviting residents and visitors alike to relish in the extended daylight that September brings.
As September unfolds in Fortaleza, Brazil, the winds begin to settle into a rhythm, boasting an average speed of 6.5 m/s (15 mph). This represents a slight dip from the peak winds of 6.6 m/s (15 mph) experienced in August, yet it maintains a lively pace that characterizes the region's coastal charm. With wind speeds progressively increasing from the calmer days of early winter, peaking in the latter half of the year, September serves as a transitional month. It gracefully balances the robust breeziness of the height of summer while hinting at a gentle decline as it moves toward October. Such consistency in wind patterns not only contributes to Fortaleza's enchanting atmosphere but also enhances the allure for beachgoers and windsurfers alike, making September a delightful time to soak in the vibrant coastal air.
Weather in Fortaleza varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Fortaleza, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is generally warm and relatively dry, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (89°F) and only 6 mm (0.2 in) of precipitation over just one day. The humidity level is moderate at 74%. In contrast, January experiences similar minimum temperatures but slightly higher maximums, reaching up to 32°C (89°F). However, January is significantly wetter, with 83 mm (3.3 in) of rainfall spread over 18 days, and increased humidity at 84%. These factors highlight the shift from a dry, warm September to a more humid and rainy January. For more details, check Fortaleza weather in January.
In comparing the weather of September and February, we see that both months share similar average temperatures, ranging from a minimum of 23-24°C (74-75°F) to a maximum of 31°C (88-89°F). However, September is much drier, with only 6 mm of precipitation over just one day, compared to February's significant rainfall of 211 mm over 24 days. This stark difference results in higher humidity levels in February at 85%, compared to September's 74%. For more detailed information on February's weather, you can visit Fortaleza weather in February.
The weather in September and March exhibits notable contrasts, despite having similar temperature ranges. In September, temperatures typically hover between a minimum of 24°C (75°F) and a maximum of 31°C (89°F), with average humidity at 74% and minimal precipitation of just 6 mm over a single rainy day. In contrast, March sees the same temperature range but experiences significantly higher rainfall, totaling 213 mm (8.4 in) across 29 days, leading to increased humidity levels of 87%. This makes March a much wetter month, while September offers a drier, more comfortable climate. For more details on March weather in Fortaleza, check out Fortaleza weather in March.
In comparing the weather between September and April, both months exhibit similar temperature patterns, with minimums of 24°C (75°F), averages around 27°C (81°F), and maximums reaching 31°C (88-89°F). However, the contrast in precipitation is striking. September is characterized by minimal rainfall, recording only 6 mm (0.2 in) over just 1 day, while April experiences significant wetness, with a staggering 286 mm (11.2 in) spread over 27 days. Additionally, humidity levels are higher in April at 86%, compared to September's 74%. For more detailed information on April weather in Fortaleza, you can check Fortaleza weather in April.
In comparing the weather of September and May, it’s clear that both months enjoy similar temperatures, with minimums around 24°C (75°F), averages at 27°C (81°F), and maximums peaking at 31°C (89°F in September and 88°F in May). However, the contrast in precipitation is striking; September sees only 6 mm (0.2 in) of rainfall over just 1 day, while May experiences substantial rainfall, accumulating 161 mm (6.3 in) across 21 days, making it much wetter and more humid with an average humidity of 85% compared to September's 74%. For further details on May's weather, you can explore Fortaleza weather in May.
In comparing the weather between September and June, both months showcase warm averages around 27°C (81°F), but notable differences emerge. September tends to be slightly warmer at night with a minimum temperature of 24°C (75°F) compared to June’s 23°C (74°F). Additionally, September boasts less rainfall, with only 6 mm (0.2 in) over just one day, while June experiences significantly higher precipitation at 82 mm (3.2 in) across 13 days, making it a much wetter month. Humidity levels are also slightly higher in June at 81%, compared to 74% in September. For more detailed information, you can check Fortaleza weather in June.
In comparing the weather of September and July, September tends to be slightly warmer with average temperatures around 27°C (81°F) and a maximum of 31°C (89°F), while July has a similar average but peaks at 32°C (89°F). Rainfall is much more frequent in July, with 44 mm (1.7 in) of precipitation over 9 days compared to just 6 mm (0.2 in) over 1 day in September. Humidity levels remain almost consistent, with September at 74% and July at 75%. Overall, September offers a drier and slightly warmer climate, making it a pleasant transition into fall. For a detailed look at the July weather, check out Fortaleza weather in July.
In September, the weather in Fortaleza maintains a similar temperature profile to August, with minimum temperatures of 24°C (75°F) and average highs of 31°C (89°F), compared to August's minimum of 23°C (73°F) and maximum of 32°C (90°F). Both months experience high humidity levels at 74%, but September sees a decrease in precipitation, with just 6 mm (0.2 in) across a single day, while August receives 9 mm (0.4 in) over three days. This slight reduction in rainfall makes September feel a bit drier than the previous month. For more detailed information, you can check Fortaleza weather in August.
In September, the weather features a warm temperature range with a minimum of 24°C (75°F) and an average of 27°C (81°F), peaking at 31°C (89°F). The month is relatively dry, with only 6 mm (0.2 in) of precipitation over just one day and a humidity level of 74%. In comparison, October maintains similar temperatures, yet experiences slightly increased rainfall, totaling 11 mm (0.4 in) across two days, while the humidity remains quite steady at 75%. For more detailed information on October weather, check out Fortaleza weather in October.
In September, the weather tends to be warm and relatively dry, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (89°F), and only 6 mm (0.2 in) of precipitation over just one day. The humidity is moderately high at 74%. In contrast, November sees slightly warmer temperatures, with a minimum of 25°C (77°F) and a maximum of 32°C (90°F), alongside increased precipitation totaling 17 mm (0.7 in) over four days, resulting in a higher humidity level of 77%. For more detailed insights on November weather, check out Fortaleza weather in November.
In September, the weather in Fortaleza is typically warm with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (89°F) and an average of 27°C (81°F). This month sees minimal precipitation, averaging just 6 mm (0.2 in) over only 1 day, and humidity levels at 74%. In contrast, December experiences similar temperature ranges, with a minimum of 24°C (76°F), an average of 28°C (82°F), and a maximum of 31°C (89°F). However, December is considerably wetter, receiving around 48 mm (1.9 in) of rain over 12 days, and humidity increases to 81%. For more detailed information, you can explore Fortaleza weather in December.
As the transition month into spring, September offers a delightful break from the more intense heat of the preceding months in Fortaleza. While temperatures remain warm and inviting, averaging around 27°C (81°F), the humidity levels can feel more comfortable. Notably, rainfall is minimal, with only a single day of precipitation, making it a perfect time for outdoor activities. This blend of warm temperatures and low rain makes September a charming choice for those looking to explore the vibrant city and its stunning coastline. For more insights and a deeper understanding of what to expect, check the Fortaleza Climate.