September Weather in Santiago Tuxtla, Mexico

Last updated: April 22, 2025

In Santiago Tuxtla, Mexico, September ushers in a blend of warm temperatures and significant rainfall. The month sees maximum temperatures soaring up to 34°C (94°F) and average daily temperatures lingering around a comfortable 27°C (81°F), while the nights maintain a mild minimum of 22°C (71°F). This period is marked by noteworthy precipitation, totaling 322 mm (12.7 in) spread over 26 days, resulting in a humidity level of 86% that accentuates the lushness of the region. September's weather in Santiago Tuxtla presents both challenges and beauty, as the tropical climate fosters rich landscapes and a vibrant atmosphere.

September Temperature in Santiago Tuxtla

In September, Santiago Tuxtla experiences warm and inviting temperatures that reflect the end of summer, with minimums around 22°C (71°F) and averaging 27°C (81°F). As the month progresses, daytime highs reach up to 34°C (94°F), making it ideal for those who bask in the sun's rays. This temperature profile shows a slight dip compared to the peak heat of previous months, yet still holds on to the tropical warmth characteristic of the region. With the air remaining comfortable and humid, September is a perfect blend of warm weather and the promise of the upcoming autumn, inviting both locals and travelers to enjoy the lush landscapes that thrive in this climatic embrace.

September Weather in Santiago Tuxtla: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santiago Tuxtla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec717376808281818180797472
Data source: Temperature data for Santiago Tuxtla 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 Santiago Tuxtla

In September, Santiago Tuxtla experiences a significant surge in precipitation, with an impressive 322 mm (12.7 in) of rain falling over 26 days. This month marks the peak of the annual rainy season, showcasing a sharp increase compared to the preceding months, notably outpacing August’s 250 mm (9.8 in). The consistent rainfall contributes to lush landscapes but can also lead to occasional flooding. Following the trend seen in the summer months, which saw abundant rains in July and August, September stands out as a culmination of this wet season, paving the way for the slightly drier October, where precipitation tends to diminish yet remains substantial. Overall, September serves as a vivid reminder of the region's vibrant climate dynamics and the essential role that seasonal rains play in sustaining local ecosystems.

September Precipitation Trends in Santiago Tuxtla

The chart displays monthly precipitation patterns in Santiago Tuxtla, 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.
JanFebMarAprMayJunJulAugSepOctNovDec11589584869285226250322358222109
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santiago Tuxtla

In September, Santiago Tuxtla, Mexico experiences a notable humidity level of 86%, marking a slight uptick from the drier months of summer. This increase in humidity is part of a broader trend observed throughout the year, where the region tends to maintain high moisture levels, particularly in the latter half of the year. Following the relatively stable humidity of 81-82% during July and August, September's figures set the stage for an even wetter October, which sees a jump to 90%. As the year progresses, the humidity consistently rises, reaching a peak of 91% in both November and December, underscoring a clear seasonal pattern that highlights Santiago Tuxtla's lush, tropical climate.

September Average Humidity in Santiago Tuxtla

This chart illustrates the average monthly humidity levels in Santiago Tuxtla, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%86%84%81%82%81%81%82%86%90%91%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santiago Tuxtla

As September rolls into Santiago Tuxtla, Mexico, residents and visitors should brace for a significant UV Index that hovers at 13, categorizing it as extreme with a burn time of just 10 minutes. This trend of high UV levels, consistent since March, emphasizes the need for sun protection strategies when enjoying the sunny days. The summer months show a peak UV Index of 14 in June and July, yet September remains similarly intense, offering little respite. As the year progresses towards October, the UV Index dips slightly to 11, but vigilance is still urged given the extreme ratings prevalent in the months prior. For more details on the UV levels throughout the year, visit Santiago Tuxtla UV Index.

Maximum UV Index Levels in Santiago Tuxtla for September

The chart shows the monthly maximum UV Index (UVI) for Santiago Tuxtla 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.
JanFebMarAprMayJunJulAugSepOctNovDec911121313141413131198
Data source: Santiago Tuxtla 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 Santiago Tuxtla

Santiago Tuxtla basks in a warm embrace of sunlight throughout the year, with September offering a delightful 282 hours of sunshine. This month, while slightly less radiant than the peak summer months of May and July, still holds its own in the sun-drenched landscape of the region. Following a delightful summer, the city transitions into fall, where sunlight begins to wane gradually. Notably, the gradual decline from the sunniest months signals a shift in seasons, showcasing a consistent trend of diminishing daylight as the year inches toward winter. Despite this decrease, September remains a vibrant month filled with warmth and charm, making it an appealing time for visitors to experience the town’s rich culture under its golden rays.

Monthly Sunshine Duration in Santiago Tuxtla: September Highlighted

The September sunshine duration represents the total number of hours Santiago Tuxtla 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.
JanFebMarAprMayJunJulAugSepOctNovDec191h237h300h307h328h281h309h305h282h269h263h256h
Data source: Santiago Tuxtla September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Santiago Tuxtla During September

When considering the likelihood of sunny weather in Santiago Tuxtla, Mexico, September presents a notable dip in sunshine, with only an 18% chance of clear skies. This marks a significant decline compared to the more favorable conditions seen in earlier months like March (61%) and April (58%). As the rainy season peaks, the sun takes a backseat, leading to a shift from the summer brightness experienced in the preceding months of June (14%) and July (32%). While October's chances improve slightly to 31%, September remains one of the cloudier months of the year, making it less likely for sun-seekers to find their ideal weather during this time.

Percentage of Sunny Days in September in Santiago Tuxtla

The chart illustrates the percentage of sunny days in Santiago Tuxtla 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 Santiago Tuxtla experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec25%52%61%58%42%14%32%28%18%31%48%55%
Data source: Santiago Tuxtla September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Santiago Tuxtla in September

In Santiago Tuxtla, Mexico, September marks a transition as the daylight duration settles at a comfortable 12 hours, mirroring the earlier months of March, April, May, and August. This balance of light reflects a broader trend throughout the year, where the region enjoys longer days during the summer months of June and July, peaking at 13 hours. As autumn approaches, daylight gradually diminishes, with October and November both dropping back to 11 hours. Overall, the consistent patterns of sunlight not only enhance the vibrant lifestyles of locals but also create a rhythmic connection to the changing seasons.

Average Daylight Hours in Santiago Tuxtla for September

The chart illustrates the variation in daylight duration in Santiago Tuxtla throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 9m11h 32m12h 2m12h 33m12h 59m13h 12m13h 5m12h 42m12h 12m11h 41m11h 14m11h 1m
Data source: Santiago Tuxtla daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Santiago Tuxtla

In Santiago Tuxtla, the September wind gently stirs with an average speed of 2.5 m/s (6 mph), marking a slight increase from the stillness of the summer months. After experiencing the calmest winds in June, July, and August, which all hovered around 2.4 m/s, September breathes a bit more life into the air, hinting at the transition into the cooler autumn months. This upward trend continues into October, where winds pick up further to 2.8 m/s. Notably, the spring months of March and April boasted stronger breezes at around 3.8 m/s, creating a contrast to the gentler gusts that define late summer and early fall. Overall, September's winds are a refreshing prelude to the coming seasonal changes, balancing tranquility with a whisper of movement.

Average September Wind Speed in Santiago Tuxtla

The chart displays monthly wind speed patterns in Santiago Tuxtla, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.23.83.83.32.42.42.42.5 m/s2.83.02.7
Data source: Santiago Tuxtla September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Santiago Tuxtla Compares to Other Months

The weather in Santiago Tuxtla 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 Santiago Tuxtla and find detailed weather information for every month.

September and January present distinct contrasts in weather. In September, temperatures peak with a minimum of 22°C (71°F) and an average of 27°C (81°F), soaring to a maximum of 34°C (94°F). This month is characterized by high humidity at 86% and significant rainfall, with 322 mm (12.7 in) over 26 days. In contrast, January offers cooler temperatures, with a minimum of 14°C (58°F) and an average of 22°C (71°F), reaching a maximum of 32°C (89°F). Rainfall is much lighter in January, totaling 115 mm (4.5 in) across just 14 days, and humidity remains slightly elevated at 88%. For more detailed weather specifics, check out Santiago Tuxtla weather in January.

September and February showcase contrasting weather patterns. In September, the temperatures range from a minimum of 22°C (71°F) to a maximum of 34°C (94°F), with an average of 27°C (81°F). This month is characterized by high humidity at 86% and significant rainfall, totaling 322 mm (12.7 in) over 26 days. In stark contrast, February experiences cooler temperatures, with a minimum of 14°C (58°F) and a maximum of 32°C (91°F) and an average of 23°C (73°F). Precipitation drops dramatically to 89 mm (3.5 in) across just 10 days, while humidity remains steady at 86%. For a closer look at February weather specifics, refer to Santiago Tuxtla weather in February.

September and March present quite different weather conditions. In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 34°C (94°F), with an average of 27°C (81°F). This month is also characterized by high humidity at 86% and significant rainfall, accumulating 322 mm (12.7 in) over 26 days. In contrast, March features cooler temperatures, with a minimum of 14°C (58°F) and a maximum of 35°C (95°F), averaging around 24°C (76°F). Rainfall is much less in March, with only 58 mm (2.3 in) falling over just 10 days, and humidity is slightly lower at 84%. For more details, you can check Santiago Tuxtla weather in March.

September and April exhibit distinct weather trends, with September being notably warmer and wetter. In September, temperatures range from a minimum of 22°C (71°F) to a maximum of 34°C (94°F), coupled with high humidity levels of 86% and substantial rainfall of 322 mm (12.7 in) across 26 days. In contrast, April offers slightly cooler temperatures, with a minimum of 18°C (64°F) and a maximum reaching 37°C (99°F), but it experiences significantly lower precipitation at just 48 mm (1.9 in) over 9 days and a humidity level of 81%. For more detailed information on the weather, you can check Santiago Tuxtla weather in April.

September and May offer distinct weather experiences. September is characterized by warmer temperatures, with an average of 27°C (81°F) and maximum highs reaching 34°C (94°F). It also sees significant rainfall, accumulating 322 mm (12.7 in) over 26 days, and maintains high humidity at 86%. In contrast, May tends to be slightly cooler on average, at 28°C (83°F), and can spike to a scorching 37°C (98°F). The month is much drier, with only 69 mm (2.7 in) of rainfall spread over 11 days, and a lower humidity level of 82%. For more information on May weather in this region, check out Santiago Tuxtla weather in May.

September's weather in Santiago Tuxtla features slightly warmer temperatures compared to June, with average highs reaching 34°C (94°F) compared to June's maximum of 35°C (95°F). However, September experiences more rainfall, with a significant 322 mm (12.7 in) spread over 26 days, compared to June's 285 mm (11.2 in) over 23 days. Additionally, the humidity level in September is notably higher at 86%, while June maintains a slightly lower humidity of 81%. This makes September feel more humid and wetter overall, while June retains a drier, slightly warmer atmosphere. For a more detailed look, you can check out Santiago Tuxtla weather in June.

When comparing the weather in September and July, both months exhibit warm temperatures with average highs around 27°C (81°F). However, September tends to be slightly warmer, with maximum temperatures reaching up to 34°C (94°F) compared to July's peak of 33°C (92°F). Additionally, September is characterized by significantly higher precipitation, averaging 322 mm (12.7 in) over 26 days, whereas July sees only 226 mm (8.9 in) during the same number of days. The humidity is also higher in September at 86%, compared to July's 81%. For more detailed insights, you can refer to Santiago Tuxtla weather in July.

In comparing the weather of September and August, both months exhibit similar average temperatures, hovering around 27°C (81°F). However, September tends to be slightly warmer at its minimum, with a recorded low of 22°C (71°F) compared to August's 23°C (73°F). The maximum temperatures in September peak at 34°C (94°F), just above August's high of 33°C (92°F). Precipitation also markedly differs, with September experiencing significantly higher rainfall at 322 mm (12.7 in) across 26 days, compared to August's 250 mm (9.8 in) over 27 days. Additionally, humidity levels in September are higher at 86%, compared to August's 82%. For more detailed information, you can check out Santiago Tuxtla weather in August.

In September, the weather is characterized by warmer temperatures, with a minimum of 22°C (71°F) and an average of 27°C (81°F), reaching a maximum of 34°C (94°F). This month sees significant rainfall, totaling 322 mm (12.7 in) over 26 days, coupled with high humidity at 86%. Conversely, October experiences slightly cooler temperatures, with a minimum of 19°C (67°F) and an average of 26°C (79°F), and a comparable maximum of 33°C (92°F). Notably, October receives even more precipitation, amounting to 358 mm (14.1 in) within 23 days, while humidity increases to 90%. For more details on the weather patterns, check out Santiago Tuxtla weather in October.

In September, the weather is characterized by warmer temperatures, with minimums around 22°C (71°F) and averages reaching up to 27°C (81°F), while maximums can soar to 34°C (94°F). The month also experiences considerable rainfall, averaging 322 mm (12.7 in) over 26 days, accompanied by high humidity levels at 86%. In contrast, November brings cooler temperatures, with minimums dropping to 16°C (61°F) and an average of 24°C (75°F), while maximums remain warmer at 32°C (90°F). Rainfall decreases significantly to 222 mm (8.7 in) across 19 days, and humidity levels rise slightly to 91%. For those looking for more details, Santiago Tuxtla weather in November provides additional insights.

In September, the weather is notably warmer, with temperatures ranging from a minimum of 22°C (71°F) to a maximum of 34°C (94°F) and an average of 27°C (81°F). The month experiences significant rainfall, totaling 322 mm (12.7 in) over 26 days, contributing to a humid climate with an average humidity of 86%. In contrast, December sees cooler temperatures, with a minimum of 15°C (59°F) and a maximum of 31°C (88°F), averaging 22°C (72°F). Precipitation drops considerably to 109 mm (4.3 in) over just 15 days, while humidity increases slightly to 91%. For more detailed insights, check out Santiago Tuxtla weather in December.

Compare Santiago Tuxtla's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Santiago Tuxtla

As September rolls into Santiago Tuxtla, the weather exhibits a unique blend of warmth and humidity that distinguishes it from the rest of the year. With average temperatures hovering around a comfortable 27°C (81°F), days can peak at a scorching 34°C (94°F), creating a sultry atmosphere. The significant rainfall experienced this month—322 mm across roughly 26 days—adds to the lush landscape but also contributes to the high humidity levels of 86%. This combination of heat and moisture not only creates a vibrant environment but also marks September as one of the wettest months in the region. For a detailed overview of the climate in this beautiful area, visit Santiago Tuxtla Climate.