Last updated: April 22, 2025
Experience the vibrant weather of San Ildefonso, Mexico, in September, where temperatures range from a comfortable 7°C (45°F) at night to a pleasant 26°C (79°F) during the day, with an average of 17°C (63°F). This month is also characterized by significant precipitation, reaching 229 mm (9.0 in) over approximately 21 days, resulting in a moist atmosphere with humidity levels around 85%. Whether you’re exploring the lush surroundings or capturing the beauty of the changing landscape, September's climate offers a unique backdrop for your adventures.
In September, San Ildefonso, Mexico, experiences a mild transition toward autumn, with temperatures gently decreasing from the summer peak. The month sees minimum temperatures around 7°C (45°F), offering a crisp start to the day, while averaging a comfortable 17°C (63°F) and reaching a mild maximum of 26°C (79°F) in the afternoon. This pattern reflects a gradual cool-down from the hotter summer months of July and August, which are characterized by higher minimums and maximums. Overall, September strikes a delightful balance between warmth and coolness, making it an ideal time for outdoor activities and enjoying the enchanting surroundings of this charming town.
September in San Ildefonso marks a pivotal moment in the rainy season, with precipitation averaging 229 mm (9.0 in) spread over 21 days of rainfall. This substantial amount showcases a slight decrease compared to the peak months of July and August, yet it remains robust, contributing to the lush landscapes that define the region. Following a gradual ascent from the drier months at the beginning of the year, September’s rainfall continues to underscore the region's tropical climate while setting the stage for a drier October, which typically sees a significant drop to 80 mm (3.1 in). As the summer rains recede, the transition into fall becomes evident, yet the lasting impact of September's moisture will nourish the ecosystem well beyond its final drops.
In September, humidity in San Ildefonso remains notably high at 85%, mirroring the peak levels typically observed throughout the summer months of July and August. This trend highlights a consistent pattern where the warmest months bring elevated moisture levels, creating a notable tropical feel in the region. As the year progresses from January's moderate 70% humidity to the summer's peak, the transition into fall maintains this lush atmosphere before gradually declining in the following months. The lingering humidity throughout September serves as a reminder of the vibrant environment that characterizes this time of year, offering a unique blend of warmth and moisture that is quite characteristic of San Ildefonso.
As September settles in San Ildefonso, the UV Index remains notably high at 14, alongside an exposure category classified as extreme. This trend echoes the summer months, where the UV Index consistently hovered between 13 and 15, warning sun-seekers to limit their time outdoors to just 10 minutes to prevent skin damage. Following a peak in the heat during April and May, September demonstrates that the intense sun persists, reminding residents and visitors alike to stay protected while enjoying the outdoors. For more detailed insights on UV levels throughout the year, check out San Ildefonso UV Index.
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September in San Ildefonso, Mexico, sees a warm transition from summer to fall, with 274 hours of sunshine illuminating the landscape. As one of the final months of the heavy sunshine season, September's hours reflect a gradual decrease compared to the peak seen in May with 334 hours. This decline subtly hints at the shift in seasons, yet it still offers a vibrant canvas for outdoor adventures. Following the sunny heights of April and May, which are the clear leaders of the year, September holds its own as it gracefully blends into autumn's embrace while still providing a generous amount of sunlight, ideal for enjoying the beauty of this enchanting locale.
In San Ildefonso, Mexico, the likelihood of sunny weather sees a notable decline as summer transitions into early fall. September, with only a 14% chance of sunshine, is one of the cloudiest months, following a particularly bright February at 93% and the more temperate March at 80%. As the season shifts, the sun becomes increasingly elusive, with the sunniest months yielding to a wet June and July, where chances plummet to 13% and 18% respectively. While there is a slight uptick in October, reaching 28%, September stands out as a prime example of how summer's warmth gives way to the more unpredictable weather of the rainy season. If you're planning a visit in September, be prepared for overcast skies and the possibility of rain.
In San Ildefonso, Mexico, the daylight duration follows a rhythmic pattern throughout the year, peaking in the late spring and summer months. From January through February, residents enjoy a consistent 11 hours of sunlight. As spring progresses into March and April, daylight begins to extend, reaching 12 hours. The real transformation occurs in May through July, when the sun graces the region with 13 hours of daylight, inviting outdoor activities and vibrant community life. However, as summer fades into fall, daylight gently recedes, returning to 12 hours in September before settling back to 11 hours in October and further diminishing to 10 hours by December. This gradual ebb and flow of daylight not only marks the changing seasons but also enhances the natural beauty of San Ildefonso throughout the year.
In September, the wind in San Ildefonso, Mexico, sees a gentle decline, averaging just 1.5 m/s (3 mph). This marks the continuation of a trend observed throughout the summer months, where wind speeds were notably lower, with July and August recording their own minimums. As the region transitions into autumn, September's breezes feel softer, reflecting the area's gradual shift in climate. Historically, this month sits among the year's calmest, a serene pause before the winds begin to pick up again in October. Embracing this subtle stillness, residents and visitors alike find comfort in the tranquil atmosphere, perfect for enjoying the enchanting landscapes that define this unique locale.
The weather in San Ildefonso 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 Ildefonso and find detailed weather information for every month.
September and January present contrasting weather patterns. In September, temperatures range from a chilly 7°C (45°F) at night to a warm 26°C (79°F) during the day, with an average temperature of 17°C (63°F). The month is characterized by high humidity at 85% and substantial rainfall, totaling 229 mm (9.0 in) over 21 days. In contrast, January experiences milder temperature fluctuations, with minimums of 0°C (32°F) and maximums reaching 27°C (80°F), and an average temperature of 13°C (55°F). Notably, January sees significantly less rainfall, with only 12 mm (0.5 in) over just 2 days, and lower humidity at 70%. For more detailed insights on January weather, you can visit San Ildefonso weather in January.
September and February exhibit distinct differences in weather patterns. September experiences a wider temperature range, with minimums around 7°C (45°F) and maximums reaching 26°C (79°F), while February is cooler, with minimum temperatures around 3°C (38°F) and maximums peaking at 29°C (84°F). Additionally, September is significantly wetter, with 229 mm (9.0 in) of precipitation over 21 days, compared to February's much drier conditions, featuring only 12 mm (0.5 in) of rain falling over just 3 days. Humidity levels also vary, with September being more humid at 85%, in contrast to February’s 64%. For more details on February weather, you can check San Ildefonso weather in February.
September and March exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 7°C (45°F) to a maximum of 26°C (79°F), with an average of 17°C (63°F). The month is characterized by high precipitation, totaling 229 mm (9.0 in) over 21 days, and a humidity level of 85%, making it quite damp. In contrast, March presents a slightly cooler range with minimums of 5°C (42°F) and maximums reaching 30°C (86°F), while maintaining the same average temperature of 17°C (63°F). This month experiences significantly lower precipitation, with only 19 mm (0.7 in) over just 4 days and humidity at a comfortable 54%. For more detailed insights into the weather in March, check out San Ildefonso weather in March.
The weather in September and April presents a striking contrast. September typically enjoys milder temperatures, with minimums around 7°C (45°F) and maximums peaking at 26°C (79°F), but it also experiences significant rainfall, accumulating 229 mm (9.0 in) over about 21 days, and high humidity at 85%. In contrast, April boasts warmer conditions, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 32°C (90°F). Additionally, April is considerably drier, receiving only 14 mm (0.5 in) of rain over just 4 days and featuring a much lower humidity level of 61%. For more details on April weather, visit San Ildefonso weather in April.
September and May exhibit distinctly different weather patterns. In September, temperatures range from a cool 7°C (45°F) to a warm 26°C (79°F), with an average of 17°C (63°F). This month experiences significant rainfall, accumulating 229 mm (9.0 in) over 21 days, and the humidity is high at 85%, making the air feel quite damp. In contrast, May showcases warmer conditions, with temperatures ranging from 8°C (47°F) to a high of 33°C (91°F) and an average of 20°C (68°F). The precipitation in May is much lower, totaling only 62 mm (2.4 in) over 10 days, and the humidity is relatively comfortable at 75%. For more details, you can check San Ildefonso weather in May.
In comparing the weather of September and June, we see notable differences in temperature and precipitation. September experiences slightly cooler temperatures, with minimums averaging around 7°C (45°F) and maximums reaching up to 26°C (79°F), while June offers warmer conditions with minimums of 9°C (48°F) and maximums soaring to 32°C (90°F). Precipitation is also more pronounced in September, where it totals 229 mm (9.0 in) across 21 days, compared to June's 199 mm (7.8 in) over 18 days. Humidity levels are fairly similar, with September at 85% and June slightly lower at 83%. For a closer look at June weather in a specific location, you can check out San Ildefonso weather in June.
When comparing the weather in September to that of July, we notice some interesting similarities and differences. Both months feature an average temperature of around 17°C (63°F), but September has a slightly lower minimum temperature of 7°C (45°F) compared to July’s 10°C (50°F). In terms of maximum temperatures, both months peak at similar levels, with September reaching 26°C (79°F) and July hitting 26°C (80°F). However, precipitation is notably higher in September, with 229 mm (9.0 in) over 21 days, versus July's 266 mm (10.5 in) across 26 days. Humidity levels are also comparable, with September at 85% and July at 83%. For more detailed insights regarding July conditions, you can refer to San Ildefonso weather in July.
In August, the weather tends to be slightly warmer than in September, with average temperatures averaging 18°C (64°F) compared to September's 17°C (63°F). Both months experience high levels of humidity at 85%, but September sees a decrease in maximum temperatures, reaching only 26°C (79°F) compared to August's peak of 27°C (81°F). Precipitation is also slightly reduced in September, with 229 mm (9.0 in) of rain over 21 days, while August receives 245 mm (9.6 in) over 24 days. For more detailed information, you can check San Ildefonso weather in August.
In September, the weather is characterized by a wider temperature range, with minimums around 7°C (45°F) and maximums reaching up to 26°C (79°F), accompanied by considerable rainfall measuring 229 mm (9.0 in) over 21 days and a high humidity level of 85%. In contrast, October offers slightly cooler temperatures, with a minimum of 4°C (40°F) and an average of 16°C (62°F), while maximums remain similar at 27°C (81°F). This month sees significantly less precipitation, with only 80 mm (3.1 in) across 13 days and a lower humidity level of 79%. For those interested in more details about October weather, you can check San Ildefonso weather in October.
In comparing the weather of September and November, the drop in temperature is evident, with September enjoying a milder average of 17°C (63°F), while November sees a cooler average of 15°C (59°F). September experiences more significant rainfall, totaling 229 mm (9.0 in) over 21 days, whereas November is notably drier, receiving only 36 mm (1.4 in) over just 5 days. Humidity also decreases from September's 85% to November's 76%, contributing to a more comfortable atmosphere. Interestingly, although September has a maximum temperature reaching 26°C (79°F), November can still peak at 28°C (83°F) on warmer days. For more detailed information, you can check San Ildefonso weather in November.
In September, the weather is characterized by a mild climate with average temperatures around 17°C (63°F) and highs reaching up to 26°C (79°F). The month experiences significant rainfall, accumulating 229 mm (9.0 in) over 21 days, and maintaining a high humidity level of 85%. In contrast, December offers a noticeable drop in temperatures, with lows reaching -1°C (31°F) and average temperatures of 13°C (56°F). Precipitation falls dramatically to just 7 mm (0.3 in) over a single day, and humidity decreases to 74%. For more detailed insights on December weather in the San Ildefonso area, you can check this link: San Ildefonso weather in December.
As September unfolds in San Ildefonso, it brings a unique tapestry of weather that sets it apart from the drier, warmer months that precede it. This time of year ushers in a refreshing coolness, with average temperatures hovering around a comfortable 17°C (63°F), contrasting sharply with the summer heat. The high humidity at 85% and frequent precipitation across 21 days, totaling 229 mm (9.0 in), transform the landscape into a lush green haven. This combination of cooler temperatures and regular rain not only enhances the beauty of the area but also fosters a vibrant, lively atmosphere, making September a distinctive and inviting time to experience San Ildefonso. For a closer look at the overall weather patterns, visit San Ildefonso Climate.