September Weather in La Isla, Mexico

Last updated: April 22, 2025

In La Isla, Mexico, September brings a blend of tropical warmth and humidity, with maximum temperatures reaching up to 39°C (103°F) and an average of 28°C (83°F), while the nights cool only to around 22°C (71°F). The month is characterized by marked precipitation, totaling 227 mm (8.9 in), and with 23 days of rainfall, visitors should be prepared for frequent showers. High humidity levels averaging 77% add to the sultry atmosphere, making this a month distinctively rich in both warmth and tropical rain.

September Temperature in La Isla

September in La Isla, Mexico, offers a warm and inviting climate as summer begins to wane. With minimum temperatures around 22°C (71°F), visitors can expect pleasantly mild nights, making it perfect for evening strolls or outdoor dining. The average temperature reaches around 28°C (83°F), ensuring daytime activities remain comfortable yet not overly hot. As the month progresses, the maximum temperature typically peaks at 39°C (103°F), continuing the trend of late summer warmth. Despite this heat, September’s temperatures show a subtle decline from the sweltering heights seen in the preceding months, suggesting a gradual transition into fall. It’s a time when the sun still shines brightly, creating an ideal atmosphere for beach lovers and adventure seekers alike.

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

The chart illustrates September temperature patterns in La Isla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec747882868884848482807775
Data source: Temperature data for La Isla 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 Isla

September marks a significant peak in precipitation for La Isla, Mexico, with an impressive 227 mm (8.9 in) of rainfall spread across 23 days. This month stands out as one of the wettest of the year, following the already considerable rains of August and preceding a similarly wet October. The consistent rise in precipitation, particularly from June onwards, reflects the region's shift into the height of its rainy season, providing vital moisture for the ecosystem. Given this pattern, September’s frequent showers not only invigorate the landscape but also highlight the ongoing climactic transitions, making it an essential month for water replenishment in the area.

September Precipitation Trends in La Isla

The chart displays monthly precipitation patterns in La Isla, 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.
JanFebMarAprMayJunJulAugSepOctNovDec532716461012878515522722711246
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Isla

As summer wanes and September arrives in La Isla, Mexico, the humidity experiences a noticeable shift, climbing to 77%. This increase marks a transition from the more moderate levels seen in the earlier months, where humidity dipped to a refreshing low of 52% in April. Following a gradual rise throughout the summer, September's humidity sets the stage for the impending wetter season, though it remains lower than the peak levels of October at 78%. This trend highlights La Isla's humid subtropical climate, revealing a rhythm where humidity builds steadily from the dry affections of late winter and spring to the lush, balmy embrace of fall and winter.

September Average Humidity in La Isla

This chart illustrates the average monthly humidity levels in La Isla, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%73%59%53%54%55%61%71%77%78%82%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Isla

In September, La Isla, Mexico continues to experience a notably high UV Index of 13, categorizing it under the extreme exposure level, which means you should limit unprotected sun exposure to just 10 minutes. This month maintains the trend seen throughout the summer, where the UV Index consistently remained at 13 from June to August. With UV levels remaining elevated, it’s crucial for both residents and visitors to take necessary precautions to protect their skin, especially after the extreme values seen in March through April. As summer fades into fall, the indexes start to decline slightly, but for now, staying sun-safe is key. For more detailed information, check La Isla UV Index.

Maximum UV Index Levels in La Isla for September

The chart shows the monthly maximum UV Index (UVI) for La Isla 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.
JanFebMarAprMayJunJulAugSepOctNovDec911131413131313131298
Data source: La Isla 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 Isla

As the sun bathes La Isla, Mexico, in a warm embrace, September stands out with an impressive 303 hours of sunshine. Following the vibrant summer months of July and August, which boast 331 and 328 hours respectively, September maintains a delightful glow, signifying the transition into fall without losing its summer charm. The sunshine in this month slightly dips from the peak of summer but still outshines the earlier months of the year like January and February. This consistent brightness not only enhances the beauty of La Isla's landscapes but also invites visitors to indulge in outdoor activities and soak up the lasting summer vibes as the season shifts.

Monthly Sunshine Duration in La Isla: September Highlighted

The September sunshine duration represents the total number of hours La Isla 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.
JanFebMarAprMayJunJulAugSepOctNovDec214h269h310h308h321h294h331h328h303h291h276h278h
Data source: La Isla September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in La Isla During September

As September rolls in, the likelihood of sunny weather in La Isla, Mexico, typically dwindles to 32%, marking a notable dip compared to the preceding months. After the lively summer, where sun chances hover around 34% in both July and August, the transition into fall brings slightly more cloud cover and moisture. This decline follows the peak sunshine months of March, with a commendable 73% chance, and February at 68%, suggesting that summer's end ushers in a transition from the sun-soaked vibrance of earlier months. As fall approaches, it's essential to keep in mind that while September may not be the sunniest period, the charm of La Isla remains, promising a blend of warmth and the beauty of changing seasons.

Percentage of Sunny Days in September in La Isla

The chart illustrates the percentage of sunny days in La Isla 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 Isla experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec39%69%73%57%38%21%34%35%32%43%48%69%
Data source: La Isla September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in La Isla in September

In September, La Isla, Mexico enjoys a comfortable 12 hours of daylight, a continuation of the month's trend that maintains the pleasant balance of sunlight observed since April. As the year progresses, the daylight duration peaked during the summer months of June and July with a generous 13 hours, but has now settled back into a moderate rhythm. This recurring pattern, where daylight gradually increases from January through August before tapering off again from October onward, reflects the seasonal dance of light—a hallmark of La Isla's tropical charm. Visitors in September can relish the same delightful daylight that lingers in the summer air as the landscape transforms with the changing seasons.

Average Daylight Hours in La Isla for September

The chart illustrates the variation in daylight duration in La Isla throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 12m11h 34m12h 2m12h 32m12h 56m13h 8m13h 2m12h 40m12h 12m11h 42m11h 17m11h 5m
Data source: La Isla daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in La Isla

As September arrives in La Isla, Mexico, the winds begin to soften, with an average speed of just 1.9 m/s (4 mph), marking the year's lowest gusts. Following a subtle peak in the spring months, where the winds often reach up to 3.1 m/s (7 mph) in March, there has been a gentle decline through the summer. This trend of diminishing wind speeds culminates in September, before a slight uptick in the upcoming months, where October and November remain steady at 1.7 m/s (4 mph). The year begins and ends with refreshing breezes, reinforcing La Isla's charm as a tranquil escape, especially during the milder September days when the air is still and inviting.

Average September Wind Speed in La Isla

The chart displays monthly wind speed patterns in La Isla, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.52.73.12.92.52.22.42.31.9 m/s1.71.72.5
Data source: La Isla September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in La Isla Compares to Other Months

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

September and January showcase a stark contrast in weather conditions. In September, temperatures range from a minimum of 22°C (71°F) to a scorching maximum of 39°C (103°F), with an average of 28°C (83°F). The month experiences significant rainfall, totaling 227 mm (8.9 in) over 23 days, with humidity levels around 77%. In contrast, January presents a cooler climate, with temperatures dipping to a minimum of 13°C (56°F) and reaching a maximum of 36°C (97°F), averaging 23°C (74°F). Rainfall is minimal in January, with only 53 mm (2.1 in) recorded over 8 days, while humidity remains slightly higher at 84%. For more details, you can visit La Isla weather in January.

In September, the weather is characterized by warm to hot temperatures, with a minimum of 22°C (71°F) and an average of 28°C (83°F), reaching up to a scorching maximum of 39°C (103°F). This month also sees considerable rainfall, accumulating 227 mm (8.9 in) over 23 days and maintaining a high humidity level of 77%. In contrast, February offers milder conditions, with temperatures ranging from a minimum of 12°C (54°F) to an average of 26°C (78°F) and a peak of 40°C (104°F). Precipitation is significantly lower at 27 mm (1.1 in), occurring over just 4 days, and humidity is slightly less at 73%. For more detailed insights, you can visit La Isla weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 39°C (103°F), with an average temperature of 28°C (83°F). This month is also characterized by significant rainfall, featuring around 227 mm (8.9 in) of precipitation over 23 days, resulting in high humidity levels of 77%. In stark contrast, March exhibits slightly cooler minimum temperatures at 16°C (61°F), while maintaining the same average of 28°C (82°F) and peaking at 40°C (105°F). Rainfall is minimal in March, with only 16 mm (0.6 in) over just 4 days, and humidity is notably lower at 59%. For further details, see La Isla weather in March.

September and April present contrasting weather conditions. In September, temperatures average around 28°C (83°F), with a minimum of 22°C (71°F) and a maximum reaching 39°C (103°F). The month is characterized by high humidity at 77% and significant rainfall, totaling 227 mm (8.9 in) over 23 days. In contrast, April experiences a higher average temperature of 30°C (87°F), with a minimum of 16°C (61°F) and an extreme maximum of 45°C (113°F). The precipitation is minimal, only 46 mm (1.8 in) on just 6 days, and the humidity is notably lower at 52%. For a more detailed look at April weather, you can visit La Isla weather in April.

In September, temperatures in La Isla range from a minimum of 22°C (71°F) to a maximum of 39°C (103°F), with an average temperature of 28°C (83°F). The month is characterized by high humidity levels at 77% and significant rainfall, accumulating 227 mm (8.9 in) over 23 days. In contrast, May presents a warmer average temperature of 31°C (88°F), with a striking maximum of 45°C (113°F). The humidity in May is considerably lower at 53%, and the precipitation is lighter, totaling 101 mm (4.0 in) across just 11 days. For more details on May weather patterns, check La Isla weather in May.

In comparing the weather between September and June, both months exhibit warm temperatures, with June recording a slightly higher average of 29°C (84°F) compared to September's 28°C (83°F). However, June tends to reach higher extremes, peaking at 41°C (106°F) versus September's maximum of 39°C (103°F). Precipitation levels are notably higher in June, with 287 mm (11.3 in) falling over 20 days, while September experiences 227 mm (8.9 in) over 23 days, indicating more frequent rain during the latter month. Additionally, September has a higher humidity level at 77%, compared to June's 55%, creating a more humid atmosphere in September. For a closer look at June’s weather specifics, visit La Isla weather in June.

In comparing the weather of September and July, both months experience warm temperatures, with July averaging slightly higher at 29°C (84°F) compared to September's average of 28°C (83°F). However, September sees more extremes, with maximum temperatures reaching up to 39°C (103°F) compared to July's peak of 40°C (104°F). Notably, September is much wetter, featuring significant rainfall of 227 mm (8.9 in) across 23 days, while July has considerably less rain at 85 mm (3.4 in) over 15 days. Additionally, September's humidity is higher at 77%, compared to July's 61%. For more detailed information about the July weather, you can visit La Isla weather in July.

In comparing the weather between August and September, both months experience warm temperatures, but September tends to be slightly cooler on average, with temperatures ranging from a minimum of 22°C (71°F) to an average of 28°C (83°F) and a maximum of 39°C (103°F). In contrast, August has a marginally higher average temperature of 29°C (84°F). Additionally, September sees a significant increase in rainfall, with 227 mm (8.9 in) over 23 days, compared to 155 mm (6.1 in) across 21 days in August. Humidity also rises in September, averaging 77%, compared to 71% in August. For more specific details about August weather, you can refer to La Isla weather in August.

In September, temperatures are generally warmer, with a minimum of 22°C (71°F) and a maximum reaching 39°C (103°F), while October sees a slight decrease in temperature, with minimums of 19°C (67°F) and maximums of 36°C (97°F). Both months experience similar precipitation, totaling 227 mm (8.9 in), but September has rain on 23 days compared to 21 days in October. Humidity remains relatively high in both months, with September at 77% and October slightly higher at 78%. For more details, you can check La Isla weather in October.

In comparing the weather between September and November, September boasts significantly warmer temperatures, with a minimum of 22°C (71°F) and an average of 28°C (83°F), while November experiences cooler conditions, with a minimum of 16°C (61°F) and an average of 25°C (77°F). September also has a higher maximum temperature, reaching up to 39°C (103°F), in contrast to November's peak of 34°C (94°F). Additionally, September is marked by heavier precipitation, with 227 mm (8.9 in) over 23 days, whereas November sees a reduction in rainfall to 112 mm (4.4 in) over 14 days. Interestingly, November has a slightly higher humidity level at 82%, compared to September's 77%. For more detailed information, check out La Isla weather in November.

In September, the weather is characterized by high temperatures, with a minimum of 22°C (71°F) and an average of 28°C (83°F), reaching a scorching maximum of 39°C (103°F). This month also sees significant rainfall, totaling 227 mm (8.9 in) over 23 days, contributing to a relative humidity of 77%. In contrast, December offers a more temperate climate, with minimum temperatures dropping to 12°C (54°F) and a comfortable average of 24°C (75°F), peaking at 34°C (94°F). Rainfall is minimal during this month, with only 46 mm (1.8 in) over 8 days and a slightly higher humidity level of 86%. For more detailed information about December weather, you can refer to La Isla weather in December.

Compare La Isla's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in La Isla

As September unfolds in La Isla, the weather takes on a character all its own, marked by higher humidity and a notable increase in rainfall compared to other months. While the temperatures remain warm, peaking at 39°C, the prevalent moisture and frequent showers create a contrasting atmosphere that’s both lush and vibrant. This month's considerable precipitation, with nearly three-quarters of the days experiencing rain, sets the stage for a refreshing change from the drier months preceding it. To explore more about how these conditions shape La Isla's climate throughout the year, visit La Isla Climate.