September Weather in Chiapa, Mexico

Last updated: April 22, 2025

In Chiapa, Mexico, September brings a warm blend of tropical climate and lush scenery. With maximum temperatures reaching 29°C (84°F) and an average of 20°C (68°F), visitors can expect a comfortable yet humid atmosphere, with humidity levels averaging a high 86%. Rainfall is a significant feature of this month, with a substantial precipitation amount of 285 mm (11.2 in) spread across approximately 27 rainy days. Those looking to explore Chiapa during September should prepare for a vivid, green landscape, punctuated by refreshing downpours that enhance the area's natural beauty.

September Temperature in Chiapa

In September, Chiapa, Mexico experiences a pleasant transition into autumn, marked by mild temperatures that invite outdoor exploration. The minimum temperature settles around 11°C (53°F), while the average hovers at a comfortable 20°C (68°F), peaking at a maximum of 29°C (84°F). This month showcases a slight dip from the summer highs, as August's warmth gives way to more temperate conditions. September's weather not only brings relief from the summer heat but also offers a harmonious balance, making it an ideal time for visitors to engage with the vibrant culture and stunning landscapes of the region.

September Weather in Chiapa: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Chiapa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec586163676968676767666159
Data source: Temperature data for Chiapa generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Chiapa

In September, Chiapa, Mexico, experiences a significant surge in rainfall, marking it as one of the wettest months of the year with an impressive 285 mm (11.2 in) of precipitation. This deluge is accompanied by 27 days of rain, indicating that nearly the entire month is affected by wet weather. This pattern reflects a distinct upward trend in precipitation as summer transitions into autumn, following the already substantial rainfall of the preceding months. July and August also contribute to the rainy season; however, September stands out not just for its volume of rain, but also for the persistence of rainfall, showcasing the region's climate dynamics and emphasizing its lush, tropical environment during this time.

September Precipitation Trends in Chiapa

The chart displays monthly precipitation patterns in Chiapa, 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.
JanFebMarAprMayJunJulAugSepOctNovDec71567210717326418419328519811650
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chiapa

In September, Chiapa, Mexico experiences a noteworthy rise in humidity, settling at 86%—a slight increase from the previous month. This trend reflects the overall pattern of the region, where humidity tends to be higher during the latter part of the year. Following a gradual decline from the winter months, humidity levels in Chiapa stabilize around 81% during the summer, only to ascend again as the rainy season approaches. As autumn begins, the humidity is set to climb further, peaking at 90% in October and remaining consistently high into the winter, illustrating the area's characteristic lushness and vibrant atmosphere.

September Average Humidity in Chiapa

This chart illustrates the average monthly humidity levels in Chiapa, 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 Chiapa

In September, Chiapa, Mexico, experiences a UV Index of 14, maintaining its status in the extreme exposure category. This level of UV radiation means that even brief sun exposure can lead to skin burning in as little as 10 minutes. Following the peak summer months, the UV index begins to slightly decline from the intense highs of April through August, yet it remains a critical reminder of the need for protective measures against sun exposure. As the region transitions into October, the UV Index reduces to 12, but caution remains essential. For detailed insights and updates on UV levels, visit Chiapa UV Index.

Maximum UV Index Levels in Chiapa for September

The chart shows the monthly maximum UV Index (UVI) for Chiapa 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.
JanFebMarAprMayJunJulAugSepOctNovDec10121415151515141412109
Data source: Chiapa 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 Chiapa

In Chiapa, Mexico, September marks the transition into a season of moderate sunshine after the summer's peak, with an impressive 291 hours of sunlight gracing the month. This figure, while slightly lower than the summer months of July and August, still reflects a robust level of brightness that encourages outdoor adventures. The trend throughout the year reveals a gradual increase in sunshine from the 238 hours in January, peaking in the late spring and summer months, before settling into a gentle decline as fall approaches. With August showcasing 317 hours, September's sunshine provides a perfect balance for those seeking warmth without the sweltering intensity, making it an ideal time for exploration and relaxation in this vibrant region.

Monthly Sunshine Duration in Chiapa: September Highlighted

The September sunshine duration represents the total number of hours Chiapa 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.
JanFebMarAprMayJunJulAugSepOctNovDec238h276h315h315h325h298h331h317h291h306h292h297h
Data source: Chiapa September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Chiapa During September

In September, the likelihood of sunny weather in Chiapa, Mexico drops significantly, with only a 14% chance of clear skies. This trend follows a pattern where the summer months—particularly June with a mere 10% and July and August hovering around 25%—typically present more cloud cover and rain. As the region transitions from the wet summer to the drier months of October and November, where the chances of sun rise again to 24% and 26% respectively, September stands out as one of the least favorable months for sunshine. These fluctuations illustrate the dynamic nature of Chiapa's weather, making September a time when visitors might want to prepare for a mix of sun and occasional rain.

Percentage of Sunny Days in September in Chiapa

The chart illustrates the percentage of sunny days in Chiapa 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 Chiapa experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec24%47%51%43%34%10%26%25%14%24%26%53%
Data source: Chiapa September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Chiapa in September

In September, Chiapa, Mexico enjoys a pleasant 12 hours of daylight, a continuation of the balanced sunlight seen in the preceding months. As summer transitions into fall, the daylight duration remains consistent, reflecting a momentary pause after the gradual increase during the warmer summer months of June and July, which offered an extra hour of sunlight. This alignment of daylight hours indicates a steady rhythm in Chiapa's climate, where outdoor activities can thrive, framed by the lush beauty of the region. With daylight beginning to wane slightly in October, September serves as a perfect bridge between the vibrant high summer and the more subdued autumn, inviting both locals and visitors to savor the lingering warmth and daylight.

Average Daylight Hours in Chiapa for September

The chart illustrates the variation in daylight duration in Chiapa 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: Chiapa daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Chiapa

In Chiapa, Mexico, the September wind gently whispers at an average speed of 1.3 m/s (3 mph), reflecting a slight lull as summer transitions into autumn. This dip in wind speed follows a pattern observed throughout the summer months, where speeds were moderately stable at 1.6 m/s (4 mph) in July and August. As the year progresses, the winds tend to remain relatively calm, with only minor fluctuations, indicating a serene atmospheric shift during this time. With September marking one of the softer breezes of the year, it creates an inviting ambiance that perfectly complements the region's lush scenery and vibrant culture.

Average September Wind Speed in Chiapa

The chart displays monthly wind speed patterns in Chiapa, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.51.61.71.81.51.31.61.61.3 m/s1.51.51.5
Data source: Chiapa September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Chiapa Compares to Other Months

The weather in Chiapa 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 Chiapa and find detailed weather information for every month.

September and January present contrasting weather patterns. In September, the average temperature ranges from a mild 11°C (53°F) to a warm 29°C (84°F), with significant rainfall totaling 285 mm (11.2 in) over 27 days, resulting in high humidity at 86%. In stark contrast, January features cooler temperatures, with a minimum of 3°C (37°F) and an average of 14°C (58°F), while still reaching a pleasant maximum of 28°C (83°F). Precipitation in January is considerably less, at 71 mm (2.8 in) over just 13 days, and humidity remains high at 88%. For more details on the weather during this month, check out Chiapa weather in January.

September and February present quite different weather patterns, despite having the same humidity level of 86%. In September, temperatures range from a cooler 11°C (53°F) at night to a warm 29°C (84°F) during the day, accompanied by significant rainfall of 285 mm (11.2 in) over 27 days. This makes September a month marked by frequent downpours and humidity. In contrast, February features milder temperatures with a minimum of 3°C (38°F) and a maximum of 32°C (90°F), but drastically less precipitation at just 56 mm (2.2 in) over only 10 days. This creates a drier and generally more comfortable atmosphere. For more detailed insights into the February climate, you can visit Chiapa weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 20°C (68°F). This month is characterized by high humidity at 86% and significant rainfall, totaling 285 mm (11.2 in) over 27 days. In contrast, March offers slightly cooler temperatures, with a minimum of 6°C (43°F) and a maximum reaching up to 32°C (89°F). The average temperature is around 17°C (63°F), and it experiences minimal precipitation, totaling only 72 mm (2.8 in) over 12 days, alongside a humidity level of 84%. For more details on March weather in Chiapa, visit Chiapa weather in March.

September and April present notably different weather patterns. In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 20°C (68°F). The month is characterized by high humidity at 86% and significant rainfall, totaling 285 mm (11.2 in) over 27 days. In contrast, April experiences milder temperatures, with a minimum of 7°C (45°F) and a maximum reaching 33°C (92°F), averaging around 19°C (67°F). The precipitation in April is much lower at 107 mm (4.2 in) over just 16 days and slightly lower humidity at 81%. For more details, you can check Chiapa weather in April.

In comparing the weather of September and May, both months experience similar average temperatures, with September seeing an average of 20°C (68°F) and May slightly warmer at 20°C (69°F). However, May tends to have higher maximum temperatures, peaking at 33°C (91°F) compared to September's maximum of 29°C (84°F). Precipitation is more plentiful in September, with 285 mm (11.2 in) over 27 days, compared to May's 173 mm (6.8 in) across 23 days. Additionally, humidity is marginally higher in September at 86%, while May enjoys a slightly lower humidity of 82%. For more detailed information, you can check Chiapa weather in May.

In comparing the weather of September and June, we observe some notable similarities and differences. Both months have an average temperature of 20°C (68°F), with September experiencing a slightly cooler minimum of 11°C (53°F) compared to June's minimum of 13°C (57°F). June also sees a slightly higher maximum temperature of 30°C (86°F) against September's peak of 29°C (84°F). Precipitation is abundant in both months, with September receiving 285 mm (11.2 in) over 27 days, while June has 264 mm (10.4 in) over 28 days. Additionally, September has a higher humidity level of 86% compared to June's 81%. For more detailed information, you can check Chiapa weather in June.

In comparing the weather between September and July, September tends to be slightly warmer with an average temperature of 20°C (68°F) compared to July's 19°C (67°F). While both months experience high humidity, September's average humidity is a bit higher at 86% versus July's 81%. Additionally, September sees more precipitation, with 285 mm (11.2 in) falling over 27 days, compared to July's 184 mm (7.2 in) over 24 days. This means that September is generally wetter and more humid despite having similar overall temperature ranges. For more detailed insights, you can check Chiapa weather in July.

In comparing the weather between September and August, we see some notable differences. September experiences slightly cooler temperatures, with a minimum of 11°C (53°F) and a maximum of 29°C (84°F), while August has a minimum of 12°C (54°F) and a maximum of 28°C (83°F). Both months have the same average temperature of 20°C (68°F). However, September is significantly wetter, with 285 mm (11.2 in) of precipitation over 27 days, compared to August’s 193 mm (7.6 in) over 25 days. Additionally, September has a higher humidity level at 86%, compared to August's 82%. For more detailed insights, check out Chiapa weather in August.

In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 20°C (68°F). The month sees considerable rainfall, totaling 285 mm (11.2 in) over 27 days, coupled with high humidity levels at 86%. Conversely, October experiences slightly cooler temperatures, with a minimum of 9°C (49°F) and an average of 19°C (66°F), but a higher maximum of 30°C (87°F). Precipitation decreases to 198 mm (7.8 in) over 23 days, while humidity remains elevated at 90%. For more detailed information, you can visit Chiapa weather in October.

September and November present distinctly different weather patterns. In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 20°C (68°F). The month sees a significant amount of rainfall, totaling 285 mm (11.2 in) over 27 days, and the humidity level is relatively high at 86%. In contrast, November experiences cooler temperatures, with a minimum of 6°C (43°F), an average of 16°C (62°F), and a maximum of 27°C (81°F). Precipitation decreases to 116 mm (4.6 in) over just 17 days, although humidity rises slightly to 91%. For more detailed insights on November weather, visit Chiapa weather in November.

September and December present contrasting weather patterns in Chiapa. In September, temperatures range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F), with an average of 20°C (68°F). This month also experiences significant rainfall, with 285 mm (11.2 in) of precipitation spread over 27 days, contributing to a humid atmosphere with 86% humidity. In sharp contrast, December sees cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 27°C (82°F), averaging 15°C (59°F). The precipitation drops dramatically to 50 mm (2.0 in) over just 11 days, although humidity remains high at 91%. For a more detailed overview of weather in December, you can visit Chiapa weather in December.

Compare Chiapa's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Chiapa

In September, Chiapa experiences a notable shift in weather marked by increased humidity and frequent rainfall, distinguishing it from other months. With average temperatures sitting around a comfortable 20°C, the climate remains mild, yet the region faces a significant rise in precipitation, making it one of the wettest months of the year. This combination of warmth and moisture creates a lush, vibrant landscape, making it an intriguing time for nature enthusiasts. For a more detailed overview of Chiapa's weather patterns throughout the year, be sure to explore Chiapa Climate.