Last updated: April 22, 2025
In Sinaloa, Mexico, September offers an intriguing blend of warm temperatures and significant rainfall. With maximum highs reaching 36°C (96°F) and average temperatures around 25°C (77°F), the climate is notably warm. The month experiences a minimum temperature of 18°C (66°F), providing a comfortable range for both locals and visitors. However, this warmth is accompanied by substantial precipitation, totaling 212 mm (8.4 in) over 21 days, creating a lush environment bolstered by 82% humidity. This combination of heat and moisture shapes a vibrant and dynamic atmosphere, typical of Sinaloa's coastal charm during September.
In September, Sinaloa, Mexico, experiences a delightful transition as temperatures remain relatively warm, with average highs around 36°C (96°F) and lows hovering at a mild 18°C (66°F). This month marks a gentle dip from the peak summer heat, yet the climate remains inviting, perfect for outdoor activities and exploration. With an average temperature of 25°C (77°F), visitors can enjoy pleasantly warm days and comfortable evenings. As the season edges towards autumn, the gradual decrease in temperatures hints at the forthcoming cooler months, making September a fantastic time to experience the region's vibrant culture and scenic landscapes.
In September, Sinaloa experiences a significant surge in rainfall, with 212 mm (8.4 in) of precipitation recorded over 21 days. This marks a peak in the region’s wet season, following the earlier months that gradually escalate in moisture. August sets the stage with 106 mm (4.2 in), yet September's numbers more than double, underscoring its pivotal role in replenishing the local ecosystem. After a dry spell in March, the onset of summer brings increasingly frequent rain events, culminating in September’s intense precipitation. This monthly trend highlights the importance of this time of year for agriculture and water resources in Sinaloa as the rainy season prepares to transition into the drier autumn months.
As summer transitions into fall, September in Sinaloa, Mexico, maintains a notably high humidity level of 82%, mirroring the sticky conditions of August. This peak in moisture sets the stage for a sultry atmosphere that lingers into October, where humidity slightly increases to 83%. Observing the overall trend, humidity in Sinaloa tends to start high in January at 76%, gradually dipping to its lowest point in April at 57%, before climbing back up during the warmer months. Notably, the late summer and early fall months reveal a significant resurgence in humidity, characterized by a consistent range from 75% to 83%. This rhythmic pattern not only highlights the region's tropical climate but also enhances the lush landscapes that define Sinaloa's unique charm.
In September, Sinaloa experiences a consistently high UV Index of 14, categorizing it as extreme, with a burn time of just 10 minutes. This trend of high UV exposure has been prevalent since the onset of the year, with consecutive months maintaining similar intensity levels. Notably, from January through August, the average UV Index has remained above 10, particularly peaking in July at 15. As summer wanes, the UV Index only slightly decreases in October, still remaining in the extreme category. It's critical for residents and visitors alike to stay informed and take necessary precautions against harmful sun exposure throughout this month. For more insights, check the detailed Sinaloa UV Index.
UV Risk Categories
September in Sinaloa, Mexico, enjoys a splendid 287 hours of sunshine, aligning closely with the summer months that precede it. This period marked by sunlight continues the region’s trend of abundant brightness, particularly notable from July, when hours peaked at 326, gradually tapering through August to September. The consistency in sunny days throughout the year, highlighted by a slight dip in September compared to the summer peak, promises delightful weather for those savoring the tail end of the warm season. As autumn approaches, the pleasant climate remains a charm, ensuring that Sinaloa retains its reputation as a sun-soaked paradise, perfect for outdoor adventures and beach escapades.
As September arrives in Sinaloa, Mexico, the likelihood of encountering sunny weather takes a noticeable dip, with only 23% chance of sunshine. This marks a significant decline following the sunnier months of the year, particularly from January through April, when the chances soar above 50%. After a brief peak in early months, the region sees a gradual decrease in sunlight, culminating in the late summer months of June through August, which are characterized by their extreme warmth and minimal sunshine. With September's drop, locals and visitors alike should prepare for more overcast conditions, making this month less ideal for outdoor activities compared to the brighter beginnings of the year.
In September, Sinaloa, Mexico, enjoys a delightful 12 hours of daylight, continuing a trend established over the summer months. As the year progresses from spring to fall, the daylight duration peaks in June with a generous 13 hours, before slowly tapering off in the following months. Interestingly, this September day length mirrors that of the previous few months, reflecting a consistent balance of sunlight as the region transitions towards shorter days in October. Overall, Sinaloa exhibits a natural rhythm in daylight hours, with a gradual decline in light as the year draws to a close.
As September arrives in Sinaloa, the landscape embraces the calmness of the season, characterized by its gentle breezes. With an average wind speed of 1.0 m/s (2 mph), this month marks the year's lowest point for wind, creating a tranquil atmosphere. This decline follows a summer of slightly brisker winds, reflecting a gradual shift towards stillness as autumn approaches. The transition is palpable, as the previous months of July and August experienced more lively winds, averaging 1.7 m/s (4 mph) and 1.1 m/s (3 mph), respectively. Overall, September's soft winds invite a sense of serenity, allowing both locals and visitors to unwind and enjoy the breathtaking beauty of Sinaloa's landscapes in peaceful repose.
The weather in Sinaloa changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sinaloa and find detailed weather information for every month.
In September, the weather is significantly warmer, with average temperatures reaching 25°C (77°F) and highs soaring up to 36°C (96°F). This month is also marked by substantial rainfall, with 212 mm (8.4 in) of precipitation spread over 21 days and a higher humidity level of 82%. In contrast, January presents a milder climate, with average temperatures around 22°C (73°F) and maximums reaching 34°C (93°F). There is a dramatic decrease in precipitation during this month, with only 9 mm (0.4 in) recorded over just 2 days and slightly lower humidity at 76%. For more detailed insights into January weather, check out Sinaloa weather in January.
In comparing the weather of September and February, we see notable differences in temperature and precipitation. September averages around 25°C (77°F) with a minimum of 18°C (66°F) and can reach highs of 36°C (96°F), accompanied by significant rainfall totaling 212 mm (8.4 in) over 21 days and high humidity levels at 82%. In contrast, February experiences milder conditions with an average temperature of 24°C (75°F), a minimum of 13°C (55°F), and similar maximum temperatures of 36°C (97°F). However, February is much drier, with only 5 mm (0.2 in) of precipitation falling on just 1 day and a lower humidity of 68%. For more specific details on the weather in February, you can visit Sinaloa weather in February.
September and March present quite different weather patterns. In September, temperatures range from a minimum of 18°C (66°F) to a maximum of 36°C (96°F), with an average of 25°C (77°F). However, it's also marked by significant rainfall, averaging 212 mm (8.4 in) over 21 days, and high humidity at 82%. In contrast, March is characterized by slightly cooler minimum temperatures of 15°C (58°F) and higher maximums reaching 38°C (100°F), while maintaining an average similar to September at 25°C (78°F). Notably, March is much drier, experiencing only 4 mm (0.2 in) of precipitation over zero days, and the humidity drops to a more comfortable 59%. For more details, you can check Sinaloa weather in March.
September and April exhibit notable differences in weather patterns. September features warmer temperatures with a minimum of 18°C (66°F) and an average high of 36°C (96°F), while April has slightly cooler weather, with a minimum of 16°C (60°F) and a maximum of 39°C (102°F). However, April experiences significantly lower precipitation, totaling just 12 mm (0.5 in) over only 2 days, compared to September's 212 mm (8.4 in) spread over 21 days, resulting in a much more humid atmosphere in September at 82%, contrasted with April's 57%. For a more detailed look at April's climate, you can refer to Sinaloa weather in April.
September and May present distinct weather patterns. In September, temperatures typically range from a minimum of 18°C to a maximum of 36°C, with an average of 25°C. The month is characterized by considerable rainfall, with 212 mm over 21 days, leading to a high humidity level of 82%. Conversely, May sees slightly warmer temperatures, with a minimum of 19°C and a maximum of 39°C, averaging at 27°C. Rainfall is significantly less, totaling 97 mm over 17 days, and humidity drops to a more comfortable 65%. This comparison highlights the transition from a wet, humid September to a hotter, drier May. For more detailed insights into May weather, check out Sinaloa weather in May.
In comparing the weather conditions of September and June, we observe several notable differences. September tends to be slightly warmer during the nights, with a minimum temperature of 18°C compared to June's 19°C. Both months share a similar average temperature of around 25°C, while September reaches a maximum of 36°C, just above June's peak of 35°C. However, September is generally wetter, experiencing 212 mm of precipitation over 21 days, whereas June sees slightly more rainfall at 223 mm across 23 days. Additionally, September's humidity is noticeably higher at 82% compared to June's 66%, contributing to a more muggy feeling. To learn more about the weather in June, visit Sinaloa weather in June.
In comparing the weather between September and July, September tends to be slightly milder with an average temperature of 25°C (77°F), compared to July's higher average of 26°C (79°F). Both months share a minimum temperature of around 18°C (65-66°F), but July sees more extreme heat, peaking at 38°C (100°F) versus September's maximum of 36°C (96°F). Notably, September is much wetter, with 212 mm (8.4 in) of precipitation over 21 days, compared to July’s 48 mm (1.9 in) over just 7 days. Additionally, the humidity is higher in September at 82%, while July maintains a lower level of 75%. For more insights on July weather, you can refer to Sinaloa weather in July.
In September, the weather remains warm with average temperatures ranging from 18°C (66°F) to a maximum of 36°C (96°F), similar to August's range of 18°C (65°F) to 37°C (99°F). However, September sees increased precipitation at 212 mm (8.4 in) over 21 days, compared to August's 106 mm (4.2 in) over just 15 days. Both months share the same humidity level of 82%, but September's consistent rain provides a more humid and wet environment than August. For a detailed look at August weather patterns, you can check Sinaloa weather in August.
In September, the weather is characterized by warmer temperatures, with daily averages hitting around 25°C (77°F) and maximums reaching up to 36°C (96°F). It also experiences significant rainfall, totaling 212 mm (8.4 in) over 21 days, paired with high humidity levels averaging 82%. In contrast, October brings slightly cooler conditions, with average temperatures around 24°C (76°F) and maximums peaking at 34°C (94°F). Precipitation decreases to 197 mm (7.8 in) over 18 days, while humidity remains comparable at 83%. For more detailed insights, check out Sinaloa weather in October.
September and November display notable differences in weather patterns. In September, temperatures range from a minimum of 18°C (66°F) to a maximum of 36°C (96°F), with an average of 25°C (77°F). This month experiences significant precipitation, totaling 212 mm (8.4 in) over 21 days, and humidity levels are notably high at 82%. In contrast, November sees a more moderate temperature range, with minimum temperatures dropping to 14°C (57°F) and a maximum of 34°C (93°F), averaging 24°C (75°F). Rainfall in November is considerably less at 37 mm (1.5 in) over just 6 days, and humidity remains relatively high at 80%. For more detailed information, you can check Sinaloa weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 18°C (66°F) and an average of 25°C (77°F), peaking at a scorching 36°C (96°F). This month is also quite wet, featuring 212 mm (8.4 in) of precipitation over 21 days and high humidity levels at 82%. In contrast, December brings cooler conditions, with a minimum of 12°C (55°F) and an average of 23°C (73°F), while the maximum reaches a milder 34°C (93°F). Notably, December experiences significantly less rainfall—only 15 mm (0.6 in) across just 3 days—and a drop in humidity to 76%. For more detailed information about the weather during this month, you can check Sinaloa weather in December.
In September, Sinaloa experiences a unique blend of tropical warmth and high humidity, setting it apart from other months. With temperatures often peaking at a sweltering 36°C (96°F) and a muggy average of 25°C (77°F), the heat is palpable. However, this month is also marked by significant precipitation, with rain falling on nearly three-quarters of the days, contributing to an overall humidity level of 82%. These factors create a distinctly lush environment, contrasting sharply with the drier, cooler months that precede and follow. For more insights into Sinaloa's climate, check out Sinaloa Climate.