September Weather in Merida, Mexico

Last updated: April 22, 2025

September in Mérida, Mexico offers a unique blend of warmth and humidity. With maximum temperatures soaring up to 48°C (120°F) and an average of 32°C (90°F), the heat is palpable. However, cooler evenings are welcomed, dropping to a comfortable 16°C (60°F). Despite the sweltering conditions, September sees limited precipitation, with only 13 mm (0.5 in) of rain over just 2 days, allowing for plenty of opportunities to explore this vibrant city. With a humidity level of 52%, the atmosphere remains sultry, inviting visitors to embrace Mérida's rich culture and stunning architecture amid the warmth.

September Temperature in Merida

In September, Merida, Mexico, experiences a transition into the cooler months, yet temperatures remain strikingly warm. The average temperature hovers around a balmy 32°C (90°F), while minimums dip to a comfortable 16°C (60°F). Despite this slight decrease, the maximum temperatures can still soar to an impressive 48°C (120°F), showcasing Merida's continued summer-like climate. This month stands out as a balancing act between lingering heat and the promise of more mild weather ahead, inviting visitors to savor both the warmth and the vibrant cultural experiences that flourish in the city's tropical embrace.

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

The chart illustrates September temperature patterns in Merida, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec596168778291979790786757
Data source: Temperature data for Merida 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 Merida

In September, Merida experiences a slight uptick in precipitation, with 13 mm (0.5 in) recorded over two days. This marks an increase compared to previous months, where rainfall was minimal, especially during the dry spell from June to August. Although September doesn’t reach the wettest months of the year, the consistent rainfall hints at the transition into a more humid season, setting the stage for October's conditions. As the rainy season lingers, Merida's landscape becomes vibrantly green, providing a refreshing change and enriching the city's natural beauty.

September Precipitation Trends in Merida

The chart displays monthly precipitation patterns in Merida, 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.
JanFebMarAprMayJunJulAugSepOctNovDec917133207614578
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Merida

As September rolls into Merida, Mexico, the humidity levels experience a modest rise to 52%, offering a slight relief from the drier months of summer. Following the peak dryness of August at 42%, this increase signals the onset of a gradual transition toward the wetter months ahead. Interestingly, as the year progresses, humidity generally rises from the summer lows to the higher percentages observed in winter, peaking at 77% in February. This trend highlights the city’s distinctive climate shifts, where the dry heat of the summer gives way to more humid conditions in fall and winter, enveloping Merida in a comforting embrace as the seasons change.

September Average Humidity in Merida

This chart illustrates the average monthly humidity levels in Merida, 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.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Merida

In September, Merida, Mexico experiences a UV Index of 10, placing it in the very high exposure category with a burn time of just 15 minutes. This marks a slight decline from the peak UV Index of 12 observed in the summer months of June and July but remains significantly intense as the region transitions into the fall. As the year progresses, the UV Index in Merida typically begins to decrease after September, with October following closely at an 8. It’s essential for residents and visitors alike to remain vigilant about sun protection during this time. For detailed insights on UV exposure trends throughout the year, check out the Merida UV Index.

Maximum UV Index Levels in Merida for September

The chart shows the monthly maximum UV Index (UVI) for Merida 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.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110854
Data source: Merida 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 Merida

September in Merida, Mexico, enjoys a generous 322 hours of sunshine, making it a delightful time to soak up the rays before the year's end. As the summer months transition, sunshine begins to slightly wane from the peak of 374 hours in May and 377 hours in June, yet the sun still graces the city with ample light. This trend of abundant sunshine persists throughout the late summer and early fall, offering a warm reprieve as October follows closely with 303 hours. Overall, September stands out as a bridge between the sun-drenched days of summer and the cooler, less luminous months ahead, ensuring Merida continues to charm visitors with its vibrant atmosphere.

Monthly Sunshine Duration in Merida: September Highlighted

The September sunshine duration represents the total number of hours Merida 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.
JanFebMarAprMayJunJulAugSepOctNovDec202h250h308h331h374h377h376h358h322h303h263h245h
Data source: Merida September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Merida During September

September in Merida, Mexico, boasts a notable likelihood of sunny weather, with an impressive 85% chance of sunshine gracing the skies. As the final month of the rainy season approaches its end, it follows a trend of increasing sun exposure that starts to peak in the late spring and summer months. After experiencing a dip in July, when sun chances drop to 53%, the weather picks up again, with August at 84% and September making a strong return to sunny conditions. This delightful transition signals a perfect time for visitors to enjoy early autumn under the bright Merida sun, making outdoor adventures even more inviting.

Percentage of Sunny Days in September in Merida

The chart illustrates the percentage of sunny days in Merida 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 Merida experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec71%73%84%82%93%76%53%84%85%80%75%62%
Data source: Merida September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Merida in September

As September arrives in Mérida, Mexico, daylight begins to gently wane, delivering about 12 hours of sunlight—a subtle decline from the sunnier months of June and July, which boast up to 14 hours each. This shift signals the transition from summer's long, bright days to the cozy ambiance of autumn, where daylight becomes more balanced with the evenings. The pattern reflects a gradual diminishing light, with September standing as a bridge between the vibrant, sun-filled summer and the cooler, shorter days that follow in October and November. Thus, as the month unfolds, residents and visitors alike can savor the lingering warmth while preparing for the charm of shorter, softer daylight that marks the fall season.

Average Daylight Hours in Merida for September

The chart illustrates the variation in daylight duration in Merida throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 15m11h 1m12h13h13h 50m14h 15m14h 1m13h 16m12h 19m11h 19m10h 27m10h 1m
Data source: Merida daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Merida

As September arrives in Mérida, Mexico, the breezes begin to soften, with an average wind speed of just 2.5 m/s (6 mph). This marks a notable dip from the previous months, where the winds were consistently higher, peaking at 3.9 m/s (9 mph) in April. The transition into autumn brings a more tranquil atmosphere, as the gentle winds of September are reminiscent of a lull before the seasonal shift. Interestingly, this calm is mirrored in the following months of November and December, where the winds maintain a similar pace, suggesting a quieter end to the year. This gradual decrease in wind speed not only influences the climate but also enhances Mérida's charm, inviting residents and visitors alike to savor the transition of the seasons amidst its historic landscapes.

Average September Wind Speed in Merida

The chart displays monthly wind speed patterns in Merida, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.03.53.73.93.43.13.53.02.5 m/s3.02.52.8
Data source: Merida September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Merida Compares to Other Months

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

September is characterized by a significantly warmer climate, with average temperatures soaring up to 32°C (90°F) and potential highs reaching as much as 48°C (120°F). Despite its heat, September experiences a low amount of precipitation, with only 13 mm (0.5 in) over about two days, and humidity levels sitting at 52%. In contrast, January offers a much cooler and more temperate atmosphere, with an average temperature of 15°C (59°F) and maximums around 30°C (86°F). The month sees slightly less rainfall at 9 mm (0.3 in), typically over the same two days, but the humidity is higher, at 72%. For more details on January weather in the region, you can check out Merida weather in January.

In September, the weather is characterized by significantly warmer temperatures, with an average high of 32°C (90°F), while February features much cooler conditions, averaging only 16°C (62°F). The minimum temperature in September is a much warmer 16°C (60°F), compared to February's chilly minimum of 1°C (35°F). Though February experiences slightly higher precipitation at 17 mm (0.7 in), it occurs over just one day, compared to September's 13 mm (0.5 in) falling over two days. Additionally, February has higher humidity levels at 77%, which is noticeably more humid than September's 52%. For more detailed insights, you can check Merida weather in February.

In September, the weather is significantly warmer, with average temperatures reaching 32°C (90°F) and highs soaring up to 48°C (120°F), compared to milder March temperatures, where the average hovers around 20°C (68°F) and peaks at 37°C (98°F). Both months receive similar precipitation levels of 13 mm (0.5 in), but September experiences rain on two days, while March typically sees just one rainy day. Additionally, humidity is lower in September at 52%, whereas March feels more humid at 67%. For more details, check out Merida weather in March.

In comparing the weather between September and April, September is significantly hotter, with average temperatures reaching up to 32°C (90°F) and a maximum of 48°C (120°F). In contrast, April has milder temperatures, averaging 25°C (77°F) and peaking at 42°C (108°F). Additionally, September experiences a higher level of rainfall with 13 mm (0.5 in) over two days, while April sees almost negligible precipitation at just 3 mm (0.1 in) and no rainy days at all. Both months exhibit comfortable humidity levels, with September at 52% and April slightly higher at 56%. For more details, visit Merida weather in April.

In September, temperatures can soar with an average of 32°C (90°F) and can reach highs of up to 48°C (120°F), making it significantly warmer than May, where the average temperature is a cooler 28°C (82°F) with a maximum of 43°C (110°F). September experiences slightly higher humidity at 52%, compared to May's 46%, which may affect comfort levels. Precipitation is more frequent in September with 13 mm (0.5 in) over 2 days, while May remains almost dry, seeing just 2 mm (0.1 in) without any rainy days. For more details on the weather in May, you can visit Merida weather in May.

When comparing the weather in September and June, we can observe that both months showcase high temperatures, but there are some distinctions. In September, the average temperature is slightly lower at around 32°C (90°F) than June's average of 33°C (91°F), while both months experience similar maximum temperatures peaking at 48°C (120°F). Precipitation levels, however, vary significantly; September receives about 13 mm (0.5 in) of rain over 2 days, contrasting sharply with June, which enjoys a completely dry month with 0 mm (0.0 in) of precipitation. Additionally, the humidity is a bit higher in September at 52% compared to June's 48%. For more details on June weather, you can check Merida weather in June.

September and July exhibit noticeably different weather patterns. In September, the average temperature hovers around 32°C (90°F), with a minimum of 16°C (60°F) and a maximum that matches July's peak at 49°C (120°F). This month experiences slightly more precipitation at 13 mm (0.5 in) over 2 days, but humidity is higher at 52%, making it feel more humid. In contrast, July boasts a warmer average of 36°C (97°F) and a higher minimum temperature of 22°C (71°F), but slightly less precipitation, totaling 7 mm (0.3 in) over the same 2 days and lower humidity at 46%. For more details on the weather during July, visit Merida weather in July.

In comparing the weather of September and August, September experiences slightly more moderate temperatures with a minimum of 16°C (60°F) and an average of 32°C (90°F), while August has a higher minimum of 24°C (75°F) and an average of 36°C (97°F). Both months can reach high temperatures of 48°C (120°F), but August tends to be more humid at 42%, compared to September's 52%. Interestingly, September has a bit more precipitation, recorded at 13 mm (0.5 in) over 2 days, while August sees only 6 mm (0.2 in) over just 1 day. For more details about August's weather, check out Merida weather in August.

In September, the weather is marked by a significant warmth, with averages around 32°C (90°F) and highs reaching 48°C (120°F), accompanied by a modest 13 mm (0.5 in) of precipitation over just 2 days. Humidity levels sit at 52%, creating a muggy atmosphere. In contrast, October brings a noticeable drop in temperatures, with minimums around 5°C (42°F) and an average of 25°C (78°F), while maximums reach 43°C (110°F). The month enjoys less rainfall, with only 5 mm (0.2 in) recorded on a single day, and a slight increase in humidity to 58%. For more detailed information about the weather in Merida during October, check out Merida weather in October.

In September, the weather tends to be noticeably hotter, with average temperatures soaring to around 32°C (90°F) and maximum highs reaching an intense 48°C (120°F). The humidity level stands at a moderate 52%, and there's some precipitation, with 13 mm (0.5 in) expected over two days. In contrast, November brings a much cooler climate, with temperatures averaging 20°C (67°F) and a maximum of 36°C (97°F). Notably, November also experiences lower rainfall, with only 7 mm (0.3 in) and no recorded rainy days, alongside a higher humidity of 66%. For more information on the specific weather details, check out Merida weather in November.

In September, the weather in Merida is characterized by significantly warmer temperatures, with a minimum of 16°C (60°F) and an average of 32°C (90°F), peaking at a scorching 48°C (120°F). The month sees relatively low precipitation at 13 mm (0.5 in) over about 2 days, with humidity hovering around 52%. In contrast, December brings much cooler and more comfortable conditions, with temperatures ranging from a minimum of 2°C (35°F) to an average of 14°C (58°F), and a maximum of 28°C (83°F). Precipitation in December is also lower, at just 8 mm (0.3 in) over 1 day, but the humidity increases to 74%, contributing to a different feel altogether. For more detailed information, check out Merida weather in December.

Compare Merida's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Merida

In September, Merida experiences a unique blend of heat and mild humidity that sets it apart from other months. With average temperatures peaking around 32°C (90°F), it's warmer than many periods throughout the year, but the low precipitation of only 13 mm means that rain is infrequent, typically falling on just a couple of days. This results in a humidity level of about 52%, making the air feel a bit more comfortable than the intense dryness found in other summer months. As fall approaches, the weather starts to transition, offering a taste of cooler evenings with lows dipping to 16°C (60°F). Whether you're exploring the vibrant streets or indulging in local cuisine, the September climate provides an inviting setting to experience all that Merida has to offer. For more details on what to expect throughout the year, check out Merida Climate.