September Weather in La Sinaloa, Mexico

Last updated: April 22, 2025

Experience the vibrant September weather in La Sinaloa, Mexico, where temperatures range from a maximum of 36°C (97°F) to a comfortable average of 28°C (84°F), dipping as low as 23°C (74°F) at night. This month brings significant moisture, with 153 mm (6.0 in) of precipitation spread across 20 days, creating a lush, tropical atmosphere. Expect high humidity levels around 78%, which enhances the tropical feel of the region. Whether you're soaking in the warm sun or navigating through the refreshing rain showers, September in La Sinaloa offers a unique blend of warmth and vitality that captures the essence of coastal living.

September Temperature in La Sinaloa

In September, La Sinaloa, Mexico begins to transition from the summer heat, displaying consistently warm temperatures. With minimums around 23°C (74°F) and maximums reaching up to 36°C (97°F), the month offers a comfortable average of 28°C (84°F), making it a delightful time for outdoor activities. This slight dip in temperatures compared to the peak summer months signals the onset of the fall season, while still retaining warmth, perfect for enjoying the region's vibrant atmosphere. As September unfolds, the humidity lingers from the previous months, adding a tropical flair that complements the warm days and balmy nights, ideal for soaking in the local culture and natural beauty.

September Weather in La Sinaloa: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Sinaloa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec676870747984858583827669
Data source: Temperature data for La Sinaloa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in La Sinaloa

In September, La Sinaloa experiences one of its wettest months, receiving an impressive 153 mm (6.0 in) of rainfall over 20 days. This marks a slight increase from August, which itself had set the stage with 151 mm (5.9 in). Together, these two months highlight a significant wet season, following a dry spell earlier in the year, where May and April recorded no precipitation at all. The deluge in September, often characterized by afternoon thunderstorms, underscores a trending shift toward increased rainfall as the region transitions into its peak rainy season. As such, residents can expect a lively and often lush landscape, nourished by these abundant September showers.

September Precipitation Trends in La Sinaloa

The chart displays monthly precipitation patterns in La Sinaloa, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec52010026101151153384714
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Sinaloa

In September, La Sinaloa, Mexico, experiences a peak in humidity, maintaining a high level of 78% that is consistent with the moisture-laden conditions of August. This late-summer humidity reflects a gradual increase from the drier months of April and May, where levels dipped to 58% and 59%, respectively. Following the humidity surge in July, September holds on to the summer's sticky embrace before the transition to the more pleasant, cooler autumn months in the fall, where humidity begins to taper off. Notably, as the year progresses towards the end of October and into November, a gradual decline in humidity starts to set in, signaling a shift from the summer's lingering warmth to a more comfortable climate.

September Average Humidity in La Sinaloa

This chart illustrates the average monthly humidity levels in La Sinaloa, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec70%67%62%58%59%64%74%78%78%75%74%72%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Sinaloa

As September rolls around in La Sinaloa, Mexico, the UV Index maintains a steady rate of 12, classifying exposure as extreme. This trend continues from the previous months of summer, highlighting a persistent need for sun protection as the burn time remains a brief 10 minutes. With little variance from the peak levels seen in April through August, locals and visitors alike should remain vigilant about sun safety during this time. Interestingly, September marks a transition point, as the UV Index will begin to decline in the upcoming months. For detailed insights and real-time updates, you can explore La Sinaloa UV Index.

Maximum UV Index Levels in La Sinaloa for September

The chart shows the monthly maximum UV Index (UVI) for La Sinaloa in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec79101313121212121086
Data source: La Sinaloa September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in La Sinaloa

As September unfolds in La Sinaloa, the region enjoys a generous 279 hours of sunshine, marking a slight dip from the vibrant summer months. Following the peak of 361 hours in May, sunshine gradually diminishes into the autumn, yet September remains robust, outshining the later months of the year. This transition reflects the region's warm glow, with sunshine hours still noticeably higher than those in the winter months. La Sinaloa’s consistent warmth and bright days during September create a perfect backdrop for outdoor adventures and relaxation before the cooler days set in, inviting both locals and visitors to bask in its lingering summer charm.

Monthly Sunshine Duration in La Sinaloa: September Highlighted

The September sunshine duration represents the total number of hours La Sinaloa experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec222h257h306h323h361h339h323h302h279h299h270h269h
Data source: La Sinaloa September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in La Sinaloa During September

In September, La Sinaloa, Mexico, experiences a 43% chance of sunny weather, indicating a shift from the high summer months. After the vibrant sunshine of May, which boasts a 79% chance, the likelihood of clear skies begins to decline significantly by August, dropping to just 22%. As September rolls in, the chances of sun slightly recover but remain modest compared to both the earlier months and those that follow; October brightens up again with a 75% chance of sunshine. This trend highlights September as a transitional month, where the lingering effects of summer gradually ease into the more stable sunshine seen in the fall, making it a unique period for visitors and locals alike.

Percentage of Sunny Days in September in La Sinaloa

The chart illustrates the percentage of sunny days in La Sinaloa throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often La Sinaloa experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%56%65%79%59%41%22%43%76%61%57%
Data source: La Sinaloa September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in La Sinaloa in September

In September, La Sinaloa, Mexico, enjoys approximately 12 hours of daylight, a continuation of the summer's generous sunlit hours. As the month transitions from the peak of summer, where daylight stretches to its maximum during May through July, there is a gradual decline beginning in August, leading into the shorter days of October. This shift is reflective of the region's temperate climate, where daylight duration hovers between 10 to 13 hours throughout the year. Observing this trend, September marks a balanced point, bridging the vibrant summer days with the approaching autumn season, elegantly capturing the essence of changing times.

Average Daylight Hours in La Sinaloa for September

The chart illustrates the variation in daylight duration in La Sinaloa throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 47m11h 19m12h 1m12h 44m13h 20m13h 37m13h 28m12h 56m12h 15m11h 32m10h 55m10h 37m
Data source: La Sinaloa daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in La Sinaloa

In September, the winds of La Sinaloa, Mexico, gently whisper at an average speed of 1.4 m/s (3 mph), marking the year’s lowest velocity. This tranquil breeze follows a summer of slightly stronger winds, with average speeds peaking at 2.2 m/s (5 mph) in both March and June. As the season transitions, a noticeable decline in wind intensity occurs, dipping to 1.6 m/s during July and August, before reaching its calmest point in September. While the autumn air ushers in a serene atmosphere, it contrasts with the more invigorating breezes experienced earlier in the year, reflecting a natural rhythm that defines the region's climate.

Average September Wind Speed in La Sinaloa

The chart displays monthly wind speed patterns in La Sinaloa, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.81.82.22.02.12.21.61.61.4 m/s1.61.61.8
Data source: La Sinaloa September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in La Sinaloa Compares to Other Months

The weather in La 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 La Sinaloa and find detailed weather information for every month.

September and January present strikingly different weather conditions. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 36°C (97°F), with an average of around 28°C (84°F). This month is also quite wet, experiencing 153 mm (6.0 in) of precipitation over approximately 20 days, and humidity remains high at 78%. In contrast, January brings much cooler temperatures, with a minimum of 7°C (45°F), an average of 19°C (67°F), and a maximum reaching 33°C (92°F). January is notably drier, with only 5 mm (0.2 in) of precipitation occurring over just 1 day, and humidity drops to a comfortable 70%. For more details on January weather, you can visit La Sinaloa weather in January.

September and February exhibit significantly different weather patterns. In September, temperatures start at a minimum of 23°C (74°F) and can reach up to 36°C (97°F), with an average of 28°C (84°F), making it much warmer. Additionally, September experiences high humidity at 78% along with considerable rainfall, totaling 153 mm (6.0 in) over 20 days. In contrast, February presents a much cooler climate with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 33°C (91°F), averaging around 20°C (68°F). February also enjoys significantly less precipitation, with only 20 mm (0.8 in) over just 2 days, and a lower humidity level of 67%. For more details on February weather, you can visit La Sinaloa weather in February.

In September, the weather is characterized by warmer temperatures, with a minimum of 23°C (74°F) and an average of 28°C (84°F), peaking at 36°C (97°F). It also experiences quite a bit of rainfall, totaling 153 mm (6.0 in) over approximately 20 days, along with high humidity levels at 78%. In contrast, March enjoys much cooler and drier conditions, featuring a minimum temperature of 9°C (49°F), an average of 21°C (71°F), and a maximum of 35°C (95°F). With almost no precipitation recorded at 1 mm (0.0 in) and only a few days of humidity at 62%, March provides a stark contrast to the wet and humid September. For a detailed overview of March weather, check La Sinaloa weather in March.

September and April showcase a striking contrast in weather patterns. September tends to be hot and humid, with average temperatures around 28°C (84°F) and maxing out at 36°C (97°F), accompanied by significant rainfall totaling 153 mm (6.0 in) over 20 days, leading to a humidity of 78%. In stark comparison, April features a much cooler climate, with minimum temperatures dipping to 10°C (51°F) and an average of 24°C (75°F); it enjoys dry conditions with no recorded precipitation and significantly lower humidity at 58%. For more details on April conditions, you can check La Sinaloa weather in April.

September and May present contrasting weather patterns. In September, temperatures range from a minimum of 23°C (74°F) to a sweltering maximum of 36°C (97°F), with an average temperature of 28°C (84°F). However, this month is also characterized by high humidity at 78% and significant rainfall, totaling 153 mm (6.0 in) over approximately 20 days. In stark contrast, May boasts a milder climate, with temperatures ranging from a minimum of 14°C (58°F) to the same maximum of 36°C (97°F) but averaging at 26°C (79°F) overall. Remarkably, May experiences no precipitation, leading to dry conditions and a lower humidity of 59%. For more insights on May's weather, you can visit La Sinaloa weather in May.

When comparing the weather in September and June, we see notable differences. September typically experiences a minimum temperature of 23°C (74°F) and an average of 28°C (84°F), with maximum highs reaching 36°C (97°F). In contrast, June starts off slightly cooler with a minimum of 19°C (67°F) and an average temperature of 29°C (84°F), climbing to maximums of 38°C (100°F). Precipitation is significantly higher in September, averaging 153 mm (6.0 in) over 20 days, while June is much drier, receiving only 26 mm (1.0 in) over just 2 days. Additionally, September has a higher humidity level at 78%, compared to June's more comfortable 64%. For more detailed insights on June weather, visit La Sinaloa weather in June.

In comparing the weather of September and July, both months experience warm temperatures, but July tends to be slightly hotter on average with a max of 38°C (100°F) compared to September's max of 36°C (97°F). The minimum temperatures are also similar, with July starting at 24°C (75°F) and September at 23°C (74°F). July sees less rainfall, with 101 mm (4.0 in) over 14 days, while September has more precipitation at 153 mm (6.0 in) across 20 days, making it a wetter month overall. Humidity levels are higher in September at 78%, compared to July's 74%, contributing to a more oppressive feel in the later summer month. For more detailed weather information, you can visit La Sinaloa weather in July.

September's weather shows a slight decrease in temperatures compared to August, with minimum temperatures dropping to 23°C (74°F) from 24°C (75°F), and average temperatures falling from 29°C (85°F) to 28°C (84°F). The maximum temperature also experiences a modest decline, reaching 36°C (97°F) in September compared to August's 37°C (99°F). Precipitation is slightly higher in September with 153 mm (6.0 in) over 20 days, while August sees 151 mm (5.9 in) over 18 days. Despite these differences, humidity remains consistent at 78% for both months. For more information on August weather, you can visit La Sinaloa weather in August.

In comparing the weather between September and October, we observe a notable shift in conditions. September typically experiences warmer temperatures, with a minimum of 23°C (74°F) and a maximum of 36°C (97°F), alongside significant rainfall of 153 mm (6.0 in) over 20 days, resulting in a humid atmosphere at 78%. In contrast, October brings cooler nights with a minimum of 15°C (60°F) while maintaining a warm average temperature of 28°C (83°F) and a peak of 38°C (101°F). Additionally, October sees a significant decrease in precipitation to just 38 mm (1.5 in) over only 5 days, accompanied by slightly lower humidity levels at 75%. For more detailed insights on the October climate, visit La Sinaloa weather in October.

September weather is characterized by higher temperatures and significant rainfall, with average daily highs reaching up to 36°C (97°F) and precipitation totaling 153 mm (6.0 in) over 20 days. In contrast, November offers a more temperate climate, with average temperatures decreasing to 25°C (76°F) and minimal rainfall of just 47 mm (1.8 in) over only 2 days. While humidity remains relatively high in both months, it slightly decreases in November to 74%. For more detailed weather information, you can visit La Sinaloa weather in November.

In comparing the weather of September and December, a stark contrast emerges. September boasts much higher temperatures, with a minimum of 23°C (74°F) and an average of 28°C (84°F), reaching highs of 36°C (97°F). This month is also characterized by significant rainfall, averaging 153 mm (6.0 in) over 20 days, along with a humidity level of 78%. In contrast, December sees much cooler temperatures, with a minimum of 9°C (48°F), an average of 20°C (69°F), and a maximum of 34°C (94°F). Notably, December experiences far less precipitation, with only 14 mm (0.6 in) over just 2 days and a slightly lower humidity of 72%. For more details, check La Sinaloa weather in December.

Compare La Sinaloa's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in La Sinaloa

As September unfolds in La Sinaloa, the weather presents a unique blend that sets it apart from other months. Characterized by a warm average temperature, the humidity rises, creating a noticeably tropical ambiance. Rain becomes a regular companion, with precipitation occurring on nearly two-thirds of the days, signifying a shift from the drier spells of summer. Those looking to explore La Sinaloa during this vibrant month should be prepared for both the heat and the refreshing rains that nurture the region's lush landscapes. To learn more about the nuances of this region's climate, visit La Sinaloa Climate.