Last updated: April 22, 2025
September in Ajijic, Mexico is characterized by mild temperatures and a significant chance of rain. With daytime highs reaching up to 29°C (84°F) and cooler evenings averaging around 21°C (70°F), the weather remains comfortable for outdoor activities. However, be prepared for frequent showers, as the region experiences approximately 185 mm (7.3 in) of precipitation over 22 days this month, contributing to the lush scenery. The humidity levels hover around a balmy 84%, enhancing the tropical feel of this picturesque lakeside town.
As September rolls into Ajijic, Mexico, the temperatures reflect a delightful transition into early autumn. The month begins with a minimum temperature of 16°C (60°F), providing a mild start to the day, while the average creeps up to 21°C (70°F), perfect for enjoying the outdoors. Daytime highs peak at a comfortable 29°C (84°F), maintaining the warm, sunny disposition that defines the region. Compared to the summer months, September shows a slight cooling trend, particularly in the mornings and evenings, making it an inviting time for both locals and visitors to explore the vibrant culture and stunning landscapes. This blend of temperate weather encourages outdoor activities, from leisurely strolls by the lake to exhilarating adventures in the surrounding mountains.
September in Ajijic is characterized by substantial rainfall, with 185 mm (7.3 in) of precipitation recorded over 22 days—a continuation of the wet season that peaks from June to August. This month, while slightly lower than August's 191 mm (7.5 in), still brings ample moisture, contributing to the lush landscapes that define the region. As the summer rains gradually taper off into October, September stands out as a critical period for replenishing water supplies and nurturing the vibrant local flora. The trend of increased rainfall from July through September is evident, showcasing a typical monsoon pattern that sustains the scenic beauty of Ajijic as it transitions into the drier months ahead.
As September rolls into Ajijic, Mexico, the humidity reaches its peak at an impressive 84%, marking a significant rise from the drier months earlier in the year. This month comes on the heels of a steadily increasing trend from April's low of 42% to the sultry 81% in August. The transition from summer into fall often brings higher moisture levels, and September is no exception, creating a lush, vibrant atmosphere. While the humidity begins to diminish in October, dropping to 75%, September's thick air serves as a reminder of the region's tropical charm, making it a month filled with rich colors and lush landscapes.
As September arrives in Ajijic, Mexico, residents and visitors alike should prepare for an extreme UV Index of 14, matching the peak levels recorded throughout the summer months. With a recommended burn time of just 10 minutes, the need for sun protection remains critical. This month continues a trend seen since February, when the UV Index first escalated to extreme levels, signaling a season characterized by high solar exposure. As we move through this vibrant time of year, awareness and precautions against UV radiation remain essential. For more detailed information on daily UV levels, check out Ajijic UV Index.
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September in Ajijic, Mexico, continues the region's legacy of abundant sunshine, boasting 286 hours of sunlight. While this is a slight dip from the summer months, which typically enjoy over 300 hours of bright, sunny days, September still outshines many other months in the year. In fact, it marks the transition into fall, following a peak in May with 342 hours of glorious sunshine. As the region shifts into October, residents and visitors can expect a modest increase to 291 hours, ensuring that the golden rays linger through the changing seasons. Overall, September encapsulates a harmonious balance of warmth and vibrant energy, making it an ideal time for outdoor activities amidst the stunning landscapes of Ajijic.
As summer fades, September in Ajijic, Mexico, welcomes a significant drop in sunny weather, with only an 18% chance of sun. This pattern follows a trend seen from June through August, where the likelihood of clear skies dwindles, making September one of the cloudiest months of the year. Interestingly, the sun re-emerges more consistently in October, offering a 34% chance of sunny days, hinting at the transition to a more vibrant autumn. So while September might bring more overcast skies, just around the corner lies the promise of brighter days ahead.
In September, Ajijic basks in around 12 hours of daylight, a continuation of the warm, sunlit days of late summer. This month marks a gentle transition as the daylight begins to wane, echoing the gradual shift from the vibrant 13-hour days of May through August. Following September, daylight duration will further decrease in October and November, settling into the shorter days of the winter months. The overall trend illustrates the region's close connection to the rhythm of the seasons, offering a delightful blend of sunshine before the shorter days of fall and winter take hold.
As September unfolds in Ajijic, Mexico, the gentle breeze lingers at an average wind speed of 1.3 m/s (3 mph). This marks a continuation of the summer's light winds, reminiscent of the preceding months, where the air remained calm, often offering a tranquil backdrop to daily life. Notably, September's winds are consistent with those of August, reflecting a gradual decline that started mid-year. While the wind speeds have been lower than springtime peaks, they provide a soft, refreshing touch, perfect for evening strolls along the lakeside. As the heart of fall approaches, one can anticipate a slight uptick in briskness as the seasons shift, but for now, residents and visitors alike can enjoy the serene atmosphere that September's gentle winds bring.
The weather in Ajijic 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 Ajijic and find detailed weather information for every month.
September and January present contrasting weather conditions. In September, temperatures range from a minimum of 16°C (60°F) to a maximum of 29°C (84°F), with an average of 21°C (70°F). This month is also characterized by high humidity at 84% and considerable rainfall, totaling 185 mm (7.3 in) over 22 days. In stark contrast, January features milder temperatures with a minimum of 5°C (41°F) and a max of 29°C (85°F), averaging 17°C (62°F). This winter month boasts significantly lower precipitation, with only 6 mm (0.2 in) falling on just one day and relative humidity at 64%. For more detailed information, check out Ajijic weather in January.
September and February present distinct weather patterns. In September, temperatures range from a mild minimum of 16°C (60°F) to a warm maximum of 29°C (84°F), with an average of 21°C (70°F). However, this month sees considerable rainfall, with 185 mm (7.3 in) of precipitation spread over 22 days, contributing to a high humidity level of 84%. In contrast, February offers cooler temperatures, with a minimum of 5°C (42°F) and a comfortable average of 18°C (65°F) while peaking at 31°C (87°F). This month is characterized by significantly less rainfall, only 10 mm (0.4 in) in just 2 days, and a humidity drop to 57%. For a closer look at the specifics of February weather, visit Ajijic weather in February.
When comparing the weather between September and March, significant differences emerge. September sees a mild average temperature of 21°C (70°F) with a minimum of 16°C (60°F) and a maximum of 29°C (84°F). However, it is characterized by high humidity at 84% and frequent rainfall, totaling 185 mm (7.3 in) over approximately 22 days. In contrast, March boasts a similar average temperature of 21°C (70°F), but with a much lower minimum of 9°C (48°F) and a higher maximum of 33°C (92°F). This month experiences virtually no precipitation and a notably lower humidity level of 46%, making it quite dry. For a detailed look at March weather specifically, you can visit Ajijic weather in March.
September and April present quite different weather conditions. In September, temperatures range from a minimum of 16°C (60°F) to a maximum of 29°C (84°F), with an average temperature of 21°C (70°F). This month is characterized by significant rainfall, totaling 185 mm (7.3 in) over 22 days, and high humidity at 84%. In contrast, April boasts warmer temperatures, with a minimum of 10°C (50°F) and a maximum of 33°C (92°F), an average of 22°C (73°F), and virtually no precipitation, registering only 1 mm (0.0 in) over the month with 0 rainy days. The humidity in April is much lower at 42%. For those seeking more details about the weather conditions during this time, check out Ajijic weather in April.
When comparing the weather in September and May, distinct differences emerge. September experiences a minimum temperature of 16°C (60°F) and averages around 21°C (70°F), with highs reaching up to 29°C (84°F). This month is also marked by significant rainfall, totaling 185 mm (7.3 in) spread over 22 days, leading to high humidity levels of 84%. In contrast, May boasts a milder minimum temperature of 10°C (51°F) and a much warmer average of 24°C (75°F), with maximum temperatures soaring to 35°C (96°F). Precipitation in May is minimal at just 17 mm (0.7 in) and only occurs on about 4 days, resulting in a much drier atmosphere with a humidity level of 51%. This stark difference highlights May as a much warmer and drier month compared to the wet and humid conditions seen in September. For more details on the weather, you can check Ajijic weather in May.
In comparing the weather of September and June, September tends to be cooler with average temperatures ranging from a minimum of 16°C (60°F) to a maximum of 29°C (84°F). The month sees higher precipitation, with around 185 mm (7.3 in) over 22 days, contributing to a humidity level of 84%. In contrast, June brings warmer conditions, with temperatures starting at a low of 15°C (60°F) and soaring to a maximum of 35°C (96°F). June experiences less rainfall, totaling 112 mm (4.4 in) over 16 days, and features lower humidity at 74%. For a more detailed look at June weather, visit Ajijic weather in June.
When comparing the weather in September and July, we see some notable similarities and differences. Both months have an average temperature of 21°C (70°F), but July tends to be slightly warmer with a maximum of 30°C (87°F) compared to September’s 29°C (84°F). Precipitation is quite substantial in both months, with September receiving 185 mm (7.3 in) over 22 days and July experiencing slightly less at 179 mm (7.0 in) over 26 days. Additionally, September is characterized by higher humidity at 84%, compared to July's 79%. For a more detailed look at July's weather, you can check out Ajijic weather in July.
In comparing the weather conditions of September and August, we see that both months have similar average temperatures, hovering around 21°C (70°F). However, September exhibits slightly higher minimum and maximum temperatures, ranging from 16°C (60°F) to 29°C (84°F), while August has a lower minimum of 14°C (58°F) and a maximum of 29°C (85°F). Precipitation levels in September are somewhat lower, with 185 mm (7.3 in) compared to August's 191 mm (7.5 in), although precipitation occurs over 22 days in September compared to 26 days in August. Additionally, September's humidity is slightly higher at 84%, compared to August's 81%. For a detailed look at August weather patterns, check out Ajijic weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 16°C (60°F) to a maximum of 29°C (84°F), with an average temperature of 21°C (70°F). The month is characterized by higher humidity at 84%, along with significant precipitation totaling 185 mm (7.3 in) over 22 days. In contrast, October sees slightly cooler temperatures, with a minimum of 12°C (53°F) and a maximum of 30°C (86°F), averaging 20°C (69°F). The month is drier, featuring only 62 mm (2.4 in) of rain over 11 days and a reduction in humidity to 75%. For a more detailed overview, refer to Ajijic weather in October.
In comparing September and November weather, September presents a warmer climate with minimum temperatures around 16°C (60°F) and an average of 21°C (70°F), peaking at 29°C (84°F). However, it is also characterized by high humidity levels at 84% and considerable precipitation, totaling 185 mm (7.3 in) over 22 days. In contrast, November brings cooler temperatures, with a minimum of 7°C (45°F) and an average of 19°C (66°F), while still reaching a maximum of 29°C (85°F). November is significantly drier, with only 18 mm (0.7 in) of precipitation over just 2 days and lower humidity at 71%. For more details, visit Ajijic weather in November.
In September, temperatures range significantly from a minimum of 16°C (60°F) to a maximum of 29°C (84°F), with an average of 21°C (70°F). This month experiences a high level of precipitation, totaling 185 mm (7.3 in) over 22 days, while humidity remains quite high at 84%. In contrast, December brings much cooler temperatures, with a minimum of 5°C (42°F) and an average of 17°C (63°F), peaking at a comfortable 28°C (83°F). Notably, December experiences minimal rainfall, with just 5 mm (0.2 in) over only 1 day, and a slightly lower humidity level at 74%. For more detailed information, check out Ajijic weather in December.
September in Ajijic brings a notable shift in weather, characterized by higher humidity levels and increased rainfall compared to the drier months of the year. The temperatures remain pleasantly warm, with average highs around the low 20s°C, creating a comfortable atmosphere despite the frequent rain showers. With nearly three weeks of precipitation, this month is one of the wettest, marking a significant contrast to the drier summer months. As you embrace the lush greenery that follows, remember to check out more details on the seasonal changes in our comprehensive Ajijic Climate resource.