Last updated: April 22, 2025
In La Merced, Mexico, September ushers in a unique blend of weather characteristics that define the month. With maximum temperatures reaching 27°C (81°F) and an average of 18°C (65°F), days are pleasantly warm while evenings can dip to a minimum of 9°C (48°F). However, this month is also known for its significant rainfall, accumulating 227 mm (9.0 in) over 22 days, contributing to an humidity level that averages around 85%. Such climatic conditions create a refreshing yet humid atmosphere, making September a distinctive time to experience the vibrant environment of La Merced.
In September, La Merced, Mexico, experiences a relatively mild climate, characterized by temperatures that mark the transition from summer to fall. The minimum temperature hovers around a pleasant 9°C (48°F), while daytime warmth is reflected in an average of 18°C (65°F). The maximum temperature reaches a comfortable 27°C (81°F), similar to the preceding months of August. However, a subtle cooling trend begins to emerge, as September's temperatures stand out as part of a gradual decline from the summer peak seen earlier in the season. This makes September an ideal time for outdoor exploration, with the warmth perfectly balanced by the crispness of autumn approaching.
September in La Merced, Mexico, marks a significant transition in the rainy season, with precipitation reaching 227 mm (9.0 in) over 22 days. This volume places September among the month’s highest, following the torrential rains of July and August. Notably, while the rainfall slightly decreases from the peaks of the earlier summer months, it represents a consistent pattern of late-season moisture that prepares the region for its drier months ahead. As the landscape begins to transform, the lingering effects of the rains underscore September's role in sustaining both the local ecosystem and agriculture, fostering a vibrant and lush environment before the return of more arid conditions in October.
As September arrives in La Merced, Mexico, the air remains thick with humidity, averaging a notable 85%—a figure that aligns with the peak levels experienced in the preceding months of July and August. This late-summer trend showcases a significant increase from the drier months of January through March, where humidity levels dipped to a comfortable 54%. The transition into autumn sees a gradual decline, yet the damp warmth persists, holding strong before the moisture begins to recede in October. Overall, September serves as a climatic bridge, where the intense humidity of summer lingers, hinting at the tropical influences that characterize the region.
In September, La Merced, Mexico, continues to experience an extreme UV Index of 14, requiring caution and protective measures with a burn time of just 10 minutes. This marks a consistent trend in the region's UV levels as they peak during the summer months, with similar extreme readings in July and August. Following September, the UV Index slightly decreases in October but remains at a high level of 12. As the year progresses into the cooler months of November and December, the UV Index drops to very high levels of 9 and 8, respectively, indicating a much safer exposure time of 15 minutes. For those planning outdoor activities in September, it’s vital to stay informed and take protective steps against harmful sun exposure. You can explore more details on the UV Index trends in this area at La Merced UV Index.
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September in La Merced, Mexico, offers a delightful balance of sunshine, boasting 283 hours of bright daylight. This month continues the trend seen throughout the summer, with sunny days peaking in May with 335 hours before gradually tapering off. Following a summer average of over 300 hours, September's sunshine signifies a gentle transition into autumn. While it sees a reduction compared to the summer months, it still stands robust against the months that precede it, particularly January, which starts the year with a modest 238 hours. As the days grow shorter, La Merced remains a sun-kissed gem, inviting all to bask in its golden glow before the cooler months set in.
In La Merced, Mexico, September marks a notable shift in the weather patterns, presenting a low likelihood of sunny days with only a 16% chance of sunshine. This decline follows the warm summer months, where the sun shines most brightly, particularly in February with an impressive 93% chance. As the region transitions from the vibrant heat of spring and early summer, the cloud cover increases significantly in September, rivaled only by June, July, and August, which experience some of the least sunny days. This trend highlights September as a month when visitors should prepare for more overcast conditions, paving the way for the clearer skies that re-emerge by October.
As September rolls into La Merced, Mexico, the region enjoys a delightful balance of 12 hours of daylight, signaling the gradual shift into autumn. Following the sun-drenched months of June to August, which bask in the warmth of longer days, September marks a subtle transition, offering a slight decrease in daylight. This pattern is reflective of the annual cycle, where longer days peak in the summer before gracefully tapering off towards the end of the year. With the return of 12 hours, La Merced residents can relish in the golden glow of Early Fall, perfectly timed for outdoor activities and vibrant community gatherings. As daylight gradually shortens in the subsequent months, the essence of autumn beckons, promising a season rich in color and change.
As September rolls into La Merced, Mexico, the gentle whispers of the wind mirror the calmness of early autumn. With an average wind speed of 1.4 m/s (3 mph), this month stands out as one of the quieter periods in the year. Following a pattern from the summer months, where breezes remained light, September continues the trend of gentle winds, reminiscent of July and August. While the air remains stiller than in the bustling spring and summer, the subtle shifts in the breeze offer a serene backdrop for those enjoying the transition into the cooler seasons. As October approaches, one can expect a slight increase in wind speed, hinting at the lively environment awaiting in the coming months.
The weather in La Merced 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 Merced and find detailed weather information for every month.
September and January present strikingly different weather patterns. In September, temperatures range from a cool 9°C (48°F) at night to a warm average of 18°C (65°F) during the day, peaking at 27°C (81°F). Additionally, September features high humidity at 85% and significant rainfall, with 227 mm (9.0 in) over 22 days. In contrast, January brings much cooler temperatures, with nighttime lows of just 1°C (35°F) and an average of 14°C (57°F), although it can rise to a maximum of 28°C (83°F). Significantly less precipitation occurs in January, with only 11 mm (0.4 in) over just 3 days and a lower humidity level of 70%. For more details on January weather, visit La Merced weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 27°C (81°F), with an average of 18°C (65°F). This month is also marked by significant precipitation, totaling 227 mm (9.0 in) over 22 days, coupled with high humidity levels of 85%. In stark contrast, February features milder temperatures, with a minimum of 4°C (39°F) and a maximum of 29°C (85°F), averaging at 16°C (61°F). Additionally, February experiences minimal rainfall of just 12 mm (0.5 in) over only 3 days and lower humidity at 64%. For those interested in more specifics about February weather, more details can be found here: La Merced weather in February.
September and March showcase distinct weather patterns. In September, temperatures range from a cool 9°C (48°F) at night to a warm 27°C (81°F) during the day, with an average of 18°C (65°F). This month is marked by considerable rainfall of 227 mm (9.0 in) over 22 days, contributing to a high humidity level of 85%. In contrast, March experiences milder conditions with temperatures ranging from a low of 6°C (43°F) to a high of 31°C (88°F), maintaining the same average of 18°C (65°F) as September. However, March is significantly drier, with only 17 mm (0.7 in) of precipitation over just 3 days and a much lower humidity of 54%. For more specific information about March weather, you can visit this link: La Merced weather in March.
In comparing the weather patterns of September and April, notable differences emerge. September experiences a wider temperature range, with minimums at 9°C (48°F) and maximums reaching 27°C (81°F), accompanied by high humidity levels at 85%. This month is also characterized by significant precipitation, averaging around 227 mm (9.0 in) over 22 rainy days. In contrast, April boasts a milder minimum temperature of 7°C (45°F) and higher maximums of 33°C (92°F), resulting in a warmer overall average of 20°C (68°F). Additionally, April is remarkably drier, with only 10 mm (0.4 in) of precipitation occurring over just 2 days, and a lower humidity of 61%. For more detailed insights about April weather in this region, visit La Merced weather in April.
September and May present distinct contrasts in weather. While both months have a similar minimum temperature, September's average is cooler at 18°C (65°F) compared to May's warmer 21°C (70°F). May boasts higher maximum temperatures, reaching up to 34°C (94°F), whereas September peaks at 27°C (81°F). Additionally, September experiences significantly more rainfall, with 227 mm (9.0 in) over 22 days, compared to May's 54 mm (2.1 in) over 11 days. The humidity in September is also higher at 85%, while May has a slightly lower humidity level of 75%. For a closer look at May's weather patterns, you can check out La Merced weather in May.
In comparing the weather of September and June, both months feature mild temperatures, though June tends to be warmer overall. September sees a minimum temperature of 9°C (48°F) and an average of 18°C (65°F), while June has a slightly higher minimum of 10°C (51°F) and an average of 20°C (68°F). The maximum temperatures differ significantly, with September peaking at 27°C (81°F) compared to June's hot 34°C (93°F). Additionally, September experiences more precipitation, with 227 mm (9.0 in) over 22 days, compared to June's 180 mm (7.1 in) over 18 days. Humidity levels are quite similar, at 85% in September and 83% in June. For more information on June weather, you can visit La Merced weather in June.
In comparing the weather between September and July, both months exhibit similar average temperatures around 18°C (65°F), although July tends to have slightly higher maximum temperatures of 28°C (82°F) compared to September's 27°C (81°F). However, September is characterized by cooler minimum temperatures, dropping to as low as 9°C (48°F), unlike July which starts at a minimum of 11°C (52°F). Precipitation levels are notably higher in July, with 285 mm (11.2 in) of rainfall over 27 days, while September sees 227 mm (9.0 in) distributed over 22 days. Humidity remains relatively high in both months, with September at 85% and July slightly lower at 83%. For detailed insights on July conditions, you can refer to La Merced weather in July.
In comparing the weather of September and August, we see some notable differences. September experiences slightly cooler temperatures, with a minimum of 9°C (48°F) compared to August's warmer minimum of 11°C (52°F). Both months have the same average and maximum temperatures, hovering at 18°C (65°F) and 27°C (81°F), respectively. However, September is characterized by more precipitation, totaling 227 mm (9.0 in) over 22 days, in contrast to August, which sees 262 mm (10.3 in) over 25 days. Humidity remains consistent at 85% for both months. For a detailed look at August's weather, you can visit La Merced weather in August.
In September, temperatures typically range from a minimum of 9°C (48°F) to a maximum of 27°C (81°F), with an average temperature of 18°C (65°F). The month is quite wet, experiencing 227 mm (9.0 in) of precipitation over 22 days, accompanied by high humidity levels reaching 85%.
In contrast, October sees a slight drop in minimum temperatures to 5°C (42°F) and an average of 17°C (64°F), while maximum temperatures can rise to 29°C (84°F). Precipitation decreases significantly to 78 mm (3.1 in) over 14 days, and humidity levels also drop to 79%. Overall, October tends to be drier and a bit warmer, making it a pleasant transition into the fall months. For more details, check out La Merced weather in October.
In September, the weather is generally warmer and more humid, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 27°C (81°F), while averaging around 18°C (65°F). This month also experiences significant rainfall, with precipitation totaling 227 mm (9.0 in) over 22 days, leading to a high humidity level of 85%. In contrast, November sees cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 29°C (84°F), while the average hovers at 16°C (60°F). Notably, November is much drier, with only 35 mm (1.4 in) of precipitation spread over just 5 days and lower humidity at 76%. For more detailed information, you can check La Merced weather in November.
In September, the weather tends to be warm and humid, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 27°C (81°F) and an average of 18°C (65°F). This month sees significant rainfall, with around 227 mm (9.0 in) of precipitation occurring over 22 days, resulting in a humidity level of approximately 85%. In contrast, December experiences much cooler temperatures, with a minimum of 1°C (34°F), an average of 14°C (57°F), and a maximum again reaching 27°C (80°F). However, December’s precipitation is minimal, only about 6 mm (0.3 in) over just 1 day, and the humidity drops to 74%. For more detailed information on the December weather in this region, you can visit La Merced weather in December.
As September unfolds in La Merced, it brings a notable shift in weather patterns that distinguishes it from the drier months preceding it. The heightened humidity and increased precipitation, with rain gracing the region for nearly three-quarters of the month, contrast sharply with the sunnier, more stable conditions typical of summer. While daytime temperatures remain pleasantly warm, the evenings can turn cooler, offering a refreshing respite. These transitional elements not only enrich the landscape but also invigorate the local atmosphere. For more insights into how September fits within the yearly climate context, explore La Merced Climate.