Last updated: April 22, 2025
In September, the weather in Santiago Tlalpan, Mexico presents a vibrant tapestry of climate patterns. With a maximum temperature of 27°C (80°F) and an average of 16°C (61°F), autumn begins to embrace the region. As temperatures dip to a minimum of 5°C (41°F), the cooling air invites cozy evenings. However, this month is also marked by considerable precipitation, recording 149 mm (5.9 in) over 21 days, contributing to the area's lush greenery. The humidity hovers around 82%, enhancing the rich, earthy aromas of the season. Overall, September in Santiago Tlalpan is a dynamic blend of warmth and moisture, heralding the onset of autumnal charm.
In September, Santiago Tlalpan experiences a delightful transition with temperatures that reflect a mild shift towards autumn. The monthly minimum settles at a cool 5°C (41°F), while the average temperature remains steady at a comfortable 16°C (61°F), perfect for outdoor activities. As the days progress, you can expect a high of 27°C (80°F), offering a balance of warmth without the summer's intensity. This month showcases a gradual decrease in temperature compared to the hotter summer months, yet still maintains a pleasant climate that invites exploration of the region's natural beauty and cultural attractions. It's a time when layers become more essential, but the overall ambiance remains inviting, setting the stage for the changing seasons ahead.
September marks a significant peak in precipitation for Santiago Tlalpan, with an impressive 149 mm (5.9 in) of rainfall occurring over 21 days. This surge reflects the culmination of the rainy season, where it consistently outpaces the preceding months—July and August recorded 97 mm (3.8 in) and 126 mm (5.0 in), respectively. As the summer heat fades, September's abundant rainfall not only nourishes the local landscape but also sets the stage for a transition into the drier autumn months ahead, with October's average dropping sharply to 69 mm (2.7 in). This trend of increasing rainfall leading up to September is vital for the region's water supply and agricultural productivity, demonstrating the importance of this month in the annual climate cycle.
In September, Santiago Tlalpan experiences a notable increase in humidity, reaching 82%, which marks a shift from the drier months of summer. This rise is part of an overall trend of fluctuating humidity levels throughout the year, beginning with January's high of 84% and gradually decreasing to a low of 68% in July. Following the summer, humidity begins to climb again, with September embracing the transitional feel of early autumn before surging to even higher levels in the subsequent months, peaking at 91% in October. This pattern highlights how Santiago Tlalpan’s climate oscillates between moister and drier periods, making September a month of notable humidity, hinting at the wetter days ahead.
In September, Santiago Tlalpan experiences a UV Index of 14, categorized as extreme, indicating a consistent need for caution under the sun. This month mirrors the high levels seen in August and reflects a broader trend throughout the year, where the UV Index often remains elevated. From January's very high 10 to late summer's extreme levels, the region's UV exposure is particularly intense in the first nine months, with a strikingly low burn time of just 10 minutes during the peak months. With this in mind, it's essential to take appropriate sun protection measures, as the sun's rays can pose significant risks. For more detailed information on UV levels, visit Santiago Tlalpan UV Index.
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As September arrives in Santiago Tlalpan, the sun continues to shine brightly, contributing 263 hours of delightful sunlight this month. Although this represents a slight dip from the sun-drenched days of May, which boasts a peak of 326 hours, it aligns with an overall trend of ample sunshine enjoyed throughout the year. Following the vibrant summer months of July and August, where totals lingered in the high 290s, September maintains a healthy glow, paving the way for the gentle warmth of autumn. With October bringing another 270 hours of sunshine, it’s clear that while September may be a transitional month, it still offers plenty of opportunities to bask in the beautiful Mexican sun.
In Santiago Tlalpan, Mexico, the likelihood of sunny weather in September experiences a notable dip, with only a 15% chance of sunshine. This marks a decline from the vibrant sunshine of earlier months like February (83%) and March (73%), showcasing a transition to the more overcast, rainy season that typically begins mid-year. The drop in sunny days continues into the late summer months, where June and July register just 11% and 21% respectively. As September rolls in, residents and visitors may want to brace themselves for cloudier skies and occasional rainfall, a stark contrast to the brighter spring days just months before.
In Santiago Tlalpan, Mexico, the daylight duration exhibits a fascinating rhythm throughout the year, peaking in spring and summer. Beginning with 11 hours of daylight in January and February, the days gradually lengthen to 12 hours in March and April, culminating in a vivid 13 hours from May to July. As summer wanes, the daylight begins to recede, dropping back to 12 hours in September, before returning to 11 hours in October and settling at 10 hours by December. This gradual ebb and flow of daylight not only marks the transition of seasons but also enriches the daily experiences of the vibrant community, celebrating the balance between light and darkness.
As September unfolds in Santiago Tlalpan, Mexico, the average wind speed gently drops to 1.9 m/s (4 mph), marking the calmest month of the year. This subtle decline follows a trend of gradually decreasing wind speeds during the summer months, where July and August hold steady at 2.0 m/s (5 mph) and 2.2 m/s (5 mph), respectively. The cooling shift towards autumn heralds a notable transition, as the breezes begin to feel softer, creating a serene atmosphere perfect for leisurely strolls in the crisp September air. The decline in wind speed from the summer's gentle currents invites a sense of tranquility, paving the way for the peaceful transition into fall as seen in the forthcoming months.
The weather in Santiago Tlalpan 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 Santiago Tlalpan and find detailed weather information for every month.
September and January in Santiago Tlalpan showcase distinct weather patterns that reflect the seasonal changes. September typically brings a broader temperature range, with minimums around 5°C (41°F) and maximums reaching up to 27°C (80°F), contributing to an average temperature of 16°C (61°F). It is also a wetter month, receiving about 149 mm (5.9 in) of precipitation over 21 days, resulting in higher humidity levels of 82%. In contrast, January experiences cooler temperatures, with minimums dipping to -1°C (30°F) and maximums at 25°C (78°F), averaging 12°C (54°F). Rain is scarce during this month, with only 10 mm (0.4 in) of precipitation over just 3 days, and humidity slightly rises to 84%. For more detailed insights on January weather, visit Santiago Tlalpan weather in January.
When comparing the weather in September and February, notable differences emerge. September features a wider temperature range, with minimums of 5°C (41°F) and maximums peaking at 27°C (80°F), while February has slightly cooler minimums at 2°C (36°F) and maximums that can reach up to 28°C (82°F). Precipitation levels in September are significantly higher at 149 mm (5.9 in) over 21 days, creating a humid environment with 82% humidity. In contrast, February is much drier, receiving only 7 mm (0.3 in) of rain over just 1 day, with humidity levels slightly lower at 78%. For more detailed information regarding the weather in February, you can refer to this link: Santiago Tlalpan weather in February.
In comparing the weather between September and March, a few key differences stand out. September experiences a broader temperature range, with minimums dipping to 5°C (41°F) and maximums reaching 27°C (80°F), while March features cooler minimums of 2°C (36°F) and higher maximums of 30°C (86°F). Precipitation is significantly higher in September, with 149 mm (5.9 in) recorded over 21 days, compared to just 17 mm (0.7 in) over 5 days in March. Additionally, September has a higher humidity level at 82%, contrasting with March's 75%, making September feel more humid. For a more detailed look at March weather, you can visit Santiago Tlalpan weather in March.
September typically features a broader temperature range, with minimums around 5°C (41°F) and maximums reaching 27°C (80°F), while April presents a slightly cooler minimum of 4°C (40°F) but similar peak temperatures of 29°C (84°F). In terms of precipitation, September is much wetter, receiving 149 mm (5.9 in) over 21 days, compared to April's modest 31 mm (1.2 in) falling over just 9 days. Additionally, September experiences higher humidity levels at 82%, while April maintains a more comfortable 70%. For a closer look at the April climate, you can visit Santiago Tlalpan weather in April.
In comparing the weather of September and May, September generally experiences a wider temperature range, with minimums dropping to around 5°C (41°F) and maximums peaking at 27°C (80°F), while May shows slightly higher temperatures with a minimum of 6°C (42°F) and a maximum of 29°C (85°F). Additionally, September sees significantly more precipitation, averaging 149 mm (5.9 in) over 21 days compared to May's 57 mm (2.2 in) over just 12 days, leading to a more humid atmosphere in September at 82% humidity versus May's 77%. For a deeper look into the weather patterns of May, you can check out Santiago Tlalpan weather in May.
In comparing the weather between September and June, we find that both months exhibit similar average temperatures, hovering around 16°C (61°F) to 16°C (62°F). However, September tends to be slightly cooler overall, with a minimum temperature of 5°C (41°F) compared to June's minimum of 7°C (46°F) and a maximum of 27°C (80°F) versus June's 29°C (84°F). Additionally, September is marked by higher precipitation, with 149 mm (5.9 in) of rainfall over 21 days, whereas June experiences 141 mm (5.5 in) over just 17 days. The humidity is also higher in September at 82%, compared to June's 76%. For more detailed insights, you can check Santiago Tlalpan weather in June.
When comparing the weather between September and July, we can observe some notable differences. September sees a slightly cooler minimum temperature of 5°C (41°F) compared to July's 6°C (43°F), while both months have a similar average temperature of 16°C (61°F) and maximum temperature reaching up to 27°C (80°F). However, September is marked by significantly higher precipitation, totaling 149 mm (5.9 in) over 21 days, compared to July's 97 mm (3.8 in) over 18 days. Additionally, September exhibits higher humidity levels at 82%, while July has a more comfortable humidity of 68%. For more detailed information on July weather, you can check Santiago Tlalpan weather in July.
In comparing the weather between September and August, September tends to be slightly cooler, with minimum temperatures dropping to 5°C (41°F) compared to August's minimum of 8°C (46°F). Both months have an average temperature of 16°C (61°F) and a maximum that peaks at 27°C (80°F). However, September is characterized by higher precipitation, recording 149 mm (5.9 in) over 21 days, while August sees 126 mm (5.0 in) across 19 days, resulting in increased humidity levels in September at 82%, compared to August's 70%. For more specific details about August's weather, visit Santiago Tlalpan weather in August.
September tends to be warmer than October, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F). In contrast, October sees slightly cooler temperatures, with a minimum of 2°C (37°F) and a maximum of 26°C (79°F). Additionally, September is significantly wetter, receiving 149 mm (5.9 in) of precipitation over 21 days, while October has much less rainfall at 69 mm (2.7 in) across just 12 days. Humidity is relatively high in both months, but October records a bit more moisture in the air at 91% compared to September’s 82%. For more specific weather details, you can check Santiago Tlalpan weather in October.
In September, the weather is notably warmer, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F). It also sees a significant amount of rainfall, totaling 149 mm (5.9 in) over approximately 21 days, coupled with a humidity level of 82%. In contrast, November experiences cooler temperatures, with averages between 0°C (33°F) and 27°C (80°F), but significantly less precipitation, only 20 mm (0.8 in) over just 3 days, and a slightly higher humidity of 89%. For more detailed insights, you can check out Santiago Tlalpan weather in November.
In September, the weather is generally mild, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F) and an average of 16°C (61°F). This month sees significant rainfall, with 149 mm (5.9 in) of precipitation distributed over 21 days and humidity levels at 82%. In contrast, December experiences much cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 25°C (77°F), though the average is warmer at 12°C (55°F). Notably, December has very low precipitation, with only 4 mm (0.2 in) falling over just one day, and humidity rising slightly to 88%. For more details on December weather, visit Santiago Tlalpan weather in December.
September in Santiago Tlalpan is characterized by a distinct shift from the dryness of the preceding months, as the region experiences a significant increase in precipitation and humidity. With frequent rain showers spreading across about 21 days, this month brings an invigorating freshness, whereas the temperatures remain pleasantly moderate, with averages hovering around 16°C. The occasional cool evenings contrast sharply with the daytime warmth, creating a unique climate that sets September apart from both the sweltering summer and the cooler winter months. For a more detailed look at the weather patterns in Santiago Tlalpan, check out the Santiago Tlalpan Climate.