Last updated: April 22, 2025
September in San Miguel de Allende, Mexico, offers a delightful mix of warm days and cooler evenings, with maximum temperatures reaching 31°C (88°F) and dipping to a comfortable average of 19°C (67°F). As the month progresses, expect a few rainy days, contributing to a total precipitation of 131 mm (5.2 in) over 15 days, which enhances the lush landscapes. Despite the showers, the humidity remains relatively high at 81%, creating a vibrant atmosphere that showcases the city’s charm. Whether wandering through cobblestone streets or enjoying local festivities, September provides a unique backdrop for experiencing the rich culture of this enchanting destination.
September in San Miguel de Allende marks a gentle transition toward cooler days, with temperatures offering a comfortable range. The month generally sees minimums around 8°C (47°F), providing a refreshing start to the day, while averages hover near 19°C (67°F), suggesting pleasant afternoons perfect for exploring the city. As the sun sets, the temperature peaks at about 31°C (88°F), allowing for warm evenings filled with outdoor dining and cultural festivities. This blend of mild mornings and warm afternoons highlights a trend of decreasing temperatures as fall approaches, setting the stage for the delightful autumn season ahead.
In September, San Miguel de Allende witnesses a significant increase in precipitation, with 131 mm (5.2 in) of rainfall spread across 15 days. This marks a continuation of the wet season that began in late spring, peaking in June and July, but it also indicates a transition towards the drier months ahead. The rainfall in September is notably higher than in August (94 mm), suggesting an active monsoon pattern that brings much-needed moisture to the region. As autumn approaches, this spike sets the stage for the gradual decline in precipitation, with October typically seeing a sharp drop to 50 mm (2.0 in). Overall, September serves as a climactic point in the seasonal cycle, showcasing the region's dynamic weather patterns.
As summer transitions into autumn in San Miguel de Allende, September experiences a notable rise in humidity, reaching 81%. This increase reflects a pattern of fluctuating moisture levels throughout the year, with the peak humidity typically seen in the later months. While January starts off with a relatively high 74%, the drier months of March and April see a dip to 58%. However, the arrival of the rainy season in June heralds a return to more humid conditions, culminating in September's sweltering figures. Following this, October and November continue this trend, with humidity reaching even higher levels at 83% and 84% respectively. This seasonal ebb and flow not only shapes the climate but also influences the vibrant natural beauty that San Miguel de Allende is renowned for.
In September, the UV Index in San Miguel de Allende remains consistently high at 14, placing it in the extreme exposure category. This trend follows a summer of elevated UV levels, where the index peaked in April and May at 15. With a burn time of just 10 minutes, residents and visitors alike must remain vigilant in protecting their skin from harmful UV rays. The enduring intensity of sunlight during this month emphasizes the importance of sun safety measures, as the UV Index gradually decreases into the autumn months. For detailed information, check the San Miguel de Allende UV Index.
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In San Miguel de Allende, Mexico, September marks the transition from the peak summer sunshine to the gentle embrace of autumn. With 291 hours of sunlight, this month still enjoys ample clear skies, although it's a slight dip from the summer highs of 341 hours in May and 331 hours in July. As the year progresses, sunlight begins to wane—October records 288 hours and November further declines to 279 hours. This gradual decrease speaks to the city's enchanting climate, where the vibrant warm tones of September's days blend beautifully with the crispness of approaching fall, making it a perfect time to savor outdoor adventures in this picturesque locale.
As summer gives way to autumn, San Miguel de Allende experiences a notable decline in sunny weather, with only a 21% chance of sunshine in September. This month is particularly marked by its transition from the rainy season, which peaks in July and August with a mere 26% and 40% of sunny days, respectively. As we progress into October, the likelihood of clear skies rises again to 41%, suggesting that while September may be characterized by overcast skies and frequent rain, it paves the way for brighter days ahead. Overall, the trend reveals a significant dip in sun-soaked days during September, contrasting sharply with the brighter conditions typically seen in the earlier months of the year.
In San Miguel de Allende, September sees a delightful 12 hours of daylight, maintaining a trend established throughout late summer. As the year progresses, daylight duration peaks at 13 hours in May, June, and July, reflecting the vibrant energy of the warmer months. However, by September, the sunlight begins to wane slightly, hinting at the transition toward autumn. Following this, daylight gradually decreases again into October, aligning with the annual rhythm of shorter days. This consistent ebb and flow of sunlight beautifully marks the changing seasons in this charming Mexican locale.
As summer fades into fall, September in San Miguel de Allende brings a gentle sigh in the air with its average wind speed dipping to 1.9 m/s (4 mph). This marks the calmest month of the year, a notable contrast to the preceding summer months where breezes were more spirited. Throughout the year, wind speeds tend to hover around 2.3 to 2.9 m/s during the earlier months, creating a lively atmosphere, but September invites a serene transition. While October sees a slight uptick back to 2.1 m/s (5 mph), September remains a tranquil pause, encouraging both locals and visitors to savor the mild warmth of early autumn among the enchanting landscapes of this historic city.
The weather in San Miguel de Allende 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 San Miguel de Allende and find detailed weather information for every month.
September and January present notably different weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 31°C (88°F), with an average of 19°C (67°F). This month experiences higher precipitation, accumulating 131 mm (5.2 in) over approximately 15 days, leading to a humid atmosphere with an average humidity of 81%.
In contrast, January boasts cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 28°C (83°F), averaging 14°C (58°F). This month sees minimal precipitation, with only 3 mm (0.1 in) and no rainy days, resulting in lower humidity levels at 74%. For more details about January weather, visit San Miguel de Allende weather in January.
When comparing the weather in September and February, it is clear that these months present quite different climates. September experiences a wider temperature range with minimums of 8°C (47°F) and maximums reaching 31°C (88°F), along with significant precipitation at 131 mm (5.2 in) across 15 days and relatively high humidity averaging 81%. In contrast, February has cooler minimum temperatures of 1°C (35°F) and slightly higher maximums of 32°C (89°F), but it sees minimal rainfall of just 6 mm (0.2 in) over only one day, with a lower humidity level of 65%. For more detailed information, check out San Miguel de Allende weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 31°C (88°F), with an average of 19°C (67°F). The month is characterized by higher precipitation of 131 mm (5.2 in) spread over 15 days, contributing to a humidity level of 81%. In contrast, March experiences generally warmer temperatures, with a minimum of 2°C (35°F) and a peak of 34°C (93°F), yet it maintains the same average temperature of 19°C (67°F) as September. March is notably drier, receiving only 9 mm (0.3 in) of rain across just 2 days, and features a lower humidity of 58%. For more details, you can check out San Miguel de Allende weather in March.
September and April present distinctly different weather patterns. September tends to be cooler, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (88°F), accompanied by high humidity at 81% and significant rainfall totaling 131 mm (5.2 in) over approximately 15 days. In contrast, April boasts warmer conditions, displaying temperatures between 6°C (44°F) and 35°C (95°F), with much lower precipitation of just 7 mm (0.3 in) across only 2 days and a more comfortable humidity level of 58%. For a more detailed look at what to expect, check out San Miguel de Allende weather in April.
September and May present contrasting weather conditions. In September, temperatures range from a cooler minimum of 8°C (47°F) to a warm maximum of 31°C (88°F), with an average of 19°C (67°F). This month typically experiences 131 mm (5.2 in) of precipitation over 15 days, resulting in a high humidity level of 81%. In contrast, May boasts milder weather, with a minimum of 9°C (49°F) and a much warmer maximum of 36°C (97°F), averaging 23°C (73°F). Rainfall is significantly lower in May, at just 38 mm (1.5 in) over 6 days, and the humidity is more comfortable at 67%. For more details about May weather, you can check San Miguel de Allende weather in May.
When comparing the weather in September and June, we see notable differences in temperature and precipitation. In September, the average temperature is slightly lower at 19°C (67°F), with a minimum of 8°C (47°F) and a maximum of 31°C (88°F). The month experiences more rainfall, totaling 131 mm (5.2 in) over 15 days, alongside a higher humidity of 81%. In contrast, June boasts warmer temperatures, averaging around 21°C (70°F) with a range from 9°C (49°F) to 35°C (96°F). Although June receives slightly more precipitation at 145 mm (5.7 in) over 14 days, it has lower humidity levels at 76%. For more details about June weather, you can check San Miguel de Allende weather in June.
When comparing the weather in September and July, both months exhibit relatively warm temperatures, but with notable differences. September experiences a wider range, with minimum temperatures dropping to 8°C (47°F) and maximums reaching 31°C (88°F), while July’s temperatures stay higher, with a minimum of 11°C (52°F) and a maximum of 33°C (91°F). Additionally, September sees more rainfall, with 131 mm (5.2 inches) over 15 days, compared to July's 117 mm (4.6 inches) over 17 days. Humidity also varies, resting at a higher 81% in September compared to July’s 67%. For more detailed information on July's weather, you can check San Miguel de Allende weather in July.
In comparing the weather between August and September, it becomes evident that September is marked by cooler temperatures, with a minimum of 8°C (47°F) compared to August's milder minimum of 12°C (53°F). The average temperature in September sits at 19°C (67°F), slightly lower than August's 20°C (69°F), while both months feature similar maximum temperatures, with September peaking at 31°C (88°F) and August at 32°C (90°F). Additionally, September experiences more precipitation, totaling 131 mm (5.2 in) over 15 days, in contrast to August's 94 mm (3.7 in) spread across 13 days. The humidity is also higher in September at 81%, compared to August's 68%. For a detailed look at August weather, you can visit San Miguel de Allende weather in August.
September and October present a transition in weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 31°C (88°F), with an average of 19°C (67°F). This month experiences significant rainfall, totaling 131 mm (5.2 in) over 15 days, along with a humidity level of 81%. In contrast, October sees slightly cooler temperatures, with a minimum of 5°C (42°F) and an average of 18°C (65°F), while the maximum remains at 31°C (87°F). Rainfall decreases to 50 mm (2.0 in) across just 8 days, and humidity rises slightly to 83%. For a detailed look at October’s weather specifics, you can check San Miguel de Allende weather in October.
In September, the weather features a wide temperature range, with minimums around 8°C (47°F) and maximums reaching up to 31°C (88°F). This month experiences substantial rainfall, totalling 131 mm (5.2 in) over approximately 15 days, alongside a high humidity level of 81%. In contrast, November brings cooler temperatures, with minimums dropping to 0°C (32°F) while still boasting a warm average of 16°C (61°F) and maximums of 30°C (87°F). Rainfall is significantly reduced in November, with only 18 mm (0.7 in) expected over just 2 days and humidity slightly rising to 84%. For more specific details on November weather, you can visit San Miguel de Allende weather in November.
September and December showcase notable differences in weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 31°C (88°F), with an average of 19°C (67°F), and the month experiences significant rainfall of 131 mm (5.2 in) over 15 days. This results in a humid atmosphere, consistently sitting at 81%. In contrast, December sees much cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 28°C (83°F), averaging 14°C (58°F). Precipitation is scarce during this month, with only 5 mm (0.2 in) recorded and no rainy days, while humidity remains constant at 81%. For more insights on December weather, you can visit San Miguel de Allende weather in December.
As September rolls into San Miguel de Allende, visitors can expect a delightful mix of warm afternoons and cooler evenings, contrasting with the sweltering summer months. While temperatures still reach a pleasant peak, the average cools down, making it more comfortable for exploring the city's charming streets. However, this month also heralds the start of the rainy season, with increased humidity and several days of precipitation, adding a refreshing element to the landscape. The lush green scenery that emerges is a stark reminder of nature's beauty during this transitional period. For those planning to visit, understanding the nuances of September's weather can enhance the experience significantly; explore more about it in detail at San Miguel de Allende Climate.