Last updated: April 22, 2025
September in San Luis Potosi, Mexico is characterized by a warm and humid climate, with maximum temperatures reaching 30°C (87°F) and an average temperature of 19°C (66°F). As the month progresses, temperatures can dip to a refreshing minimum of 9°C (49°F) during the cooler nights. This period also brings significant rainfall, totaling 101 mm (4.0 in) over approximately 15 days, contributing to an elevated humidity level of 81%. While the rain nourishes the lush surroundings, visitors can expect a vibrant mix of sunshine and showers throughout this transitional month.
In September, San Luis Potosi experiences a delightful transition towards cooler temperatures, marking a shift from the summer heat. With minimums dipping to 9°C (49°F) and average temperatures settling around 19°C (66°F), it's a refreshing respite after the warmer months. The maximum temperatures remain comfortable at 30°C (87°F), allowing for pleasant daytime activities while evenings cool down nicely. This month strikes a perfect balance, embodying the essence of early fall, as the region bids farewell to summer’s peak with a gentle embrace of the upcoming season.
In September, San Luis Potosi experiences a notable surge in precipitation, recording an impressive 101 mm (4.0 in) of rain over 15 days. This month marks a key transition in the region's weather pattern, as it sits at the tail end of the rainy season, following a summer characterized by substantial moisture, particularly in June and July. The increase in rainfall not only enhances the verdant landscapes but also replenishes water sources, creating a vibrant backdrop for the month. With September’s rainfall almost doubling that of August’s 59 mm (2.3 in), it's clear that the allure of autumn is accompanied by significant climatic shifts, fostering an atmosphere rich with life and renewal.
As the year progresses, September in San Luis Potosi stands out with a notable increase in humidity, peaking at 81%. This month marks a transition from the relatively lower levels seen during the summer, where humidity fluctuated between 64% and 78%. The trend clearly indicates that the region experiences a rise in moisture as it approaches the end of the rainy season, preparing for an even more humid October and November, which are characterized by their high humidity levels of 85% and 87%, respectively. This increase not only enhances the city's lush scenery but also contributes to a unique, enveloping atmosphere that defines the early fall in this vibrant Mexican locale.
As the summer months fade into September in San Luis Potosi, Mexico, the UV Index remains notably high at 13, placing it firmly in the extreme exposure category with a burn time of just 10 minutes. This month continues a trend observed since February, where the UV Index has consistently hovered in the extreme range, sparking heightened awareness about sun safety. Despite a slight decline from May's peak of 15, the index still signals that outdoor enthusiasts should remain vigilant, ensuring protective measures against harmful UV rays. As October approaches, a gradual decrease to 12 is expected, but the importance of sun protection stays paramount throughout these sun-drenched months. For more about the UV Index trends, visit San Luis Potosi UV Index.
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As summer transitions into autumn, September in San Luis Potosí showcases a delightful blend of sunshine and warmth, boasting 291 hours of sunlight. This month marks a gentle decline from the peak of 343 hours in May, reflecting the gradual shift in seasons. The sun-soaked days of July and August, both with 327 and 331 hours respectively, set a vibrant backdrop, while September’s sunshine still remains generous compared to the chillier months ahead. As we approach autumn, the sunlight gradually tapers off, with October and beyond offering fewer hours, yet September stands proud, capturing the essence of a Mexican summer's farewell.
As summer fades and September rolls in, the likelihood of sunny weather in San Luis Potosi takes a noticeable dip, with only a 24% chance of sun. This marks a significant decline from the sunnier months earlier in the year, particularly February's robust 78%. The trend suggests that September typically ushers in a more subdued climate, as it transitions into the rainy season. As the region prepares for cooler temperatures and increased precipitation in October, residents and visitors alike should be ready for a month where sunshine makes way for cloudier skies and sporadic showers.
In San Luis Potosi, Mexico, September marks a gentle transition as daylight duration stabilizes at 12 hours. Following the sun-drenched summer months, where daylight peaked at 13 hours from May through August, September reflects a gradual shift towards autumn, reminiscent of the longer days slowly easing into shorter ones. This balance mirrors the daylight patterns experienced throughout the year, with a peak in May and June, followed by a subtle decline in hours as the year progresses toward winter. As September unfolds, residents experience the warm embrace of early autumn, enjoying plentiful daylight while preparing for the cooler months ahead.
As September unfolds in San Luis Potosí, Mexico, the average wind speed settles at a gentle 2.3 m/s (5 mph), marking a slight dip compared to the breezier summer months. This trend of reduced winds is reminiscent of early spring, when similar calmness is observed, suggesting a seasonal transition into the cooler autumn weather. Interestingly, August, with its invigorating 3.4 m/s (8 mph) winds, provides a last gust of summer energy, before the winds steadily soften again into the fall. Overall, September's tranquil breezes invite a reflective pause, highlighting the city's shift from warmer, more dynamic days to a serene, pleasant atmosphere as it prepares for the upcoming months.
The weather in San Luis Potosi 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 Luis Potosi and find detailed weather information for every month.
September and January present distinct contrasts in weather. In September, temperatures range from a mild 9°C (49°F) at night to a warm 30°C (87°F) during the day, with an average of 19°C (66°F). The month tends to be quite humid at 81% and sees a notable amount of precipitation, totaling 101 mm (4.0 in) over 15 days. In contrast, January offers cooler conditions, with nighttime lows dropping to -1°C (31°F) and average daytime highs of 13°C (55°F), peaking at 28°C (82°F). The humidity is slightly lower at 75%, and rainfall is minimal, accumulating only 9 mm (0.3 in) across just 2 days. For more detailed information, you can check San Luis Potosi weather in January.
September and February showcase contrasting weather patterns in San Luis Potosi. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average of 19°C (66°F). This month sees significant rainfall, totaling 101 mm (4.0 in) over approximately 15 wet days and high humidity levels at 81%. In contrast, February experiences a milder climate, with temperatures ranging from 0°C (33°F) to a maximum of 32°C (91°F) and an average temperature of 15°C (60°F). Precipitation is minimal, approximately 11 mm (0.4 in) over just 2 days, and humidity is lower at 69%. For more detailed insights into February's weather, visit San Luis Potosi weather in February.
When comparing the weather in September and March, notable differences emerge. September, characterized by a minimum temperature of 9°C and an average of 19°C, experiences higher humidity at 81% and more frequent rainfall, with 101 mm spread over 15 days. In contrast, March offers a cooler minimum temperature of 0°C but a warmer maximum of 33°C, coupled with significantly lower precipitation of just 13 mm across 3 days and reduced humidity at 65%. For a more detailed look at the weather conditions, you can visit San Luis Potosi weather in March.
When comparing the weather in September and April, several notable differences emerge. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average temperature of 19°C (66°F). This month sees significant rainfall, with precipitation totaling 101 mm (4.0 in) over about 15 days and humidity levels at a high 81%. In contrast, April features slightly cooler temperatures, with a minimum of 6°C (44°F) and a maximum of 33°C (92°F), but maintains a similar average temperature of 20°C (68°F). Furthermore, April is much drier, experiencing only 14 mm (0.5 in) of rain over just 4 days and lower humidity at 64%. For more detailed information, you can check San Luis Potosi weather in April.
September and May exhibit distinct weather patterns that reflect the transition between seasons. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average of 19°C (66°F). The month is characterized by higher humidity at 81% and more precipitation, totaling 101 mm (4.0 in) spread across 15 days. In contrast, May sees slightly cooler temperatures, with a minimum of 8°C (47°F) and a peak of 35°C (95°F), averaging 22°C (71°F). This month experiences less rainfall, accumulating only 50 mm (2.0 in) over 8 days, along with lower humidity levels at 75%. For a more detailed look, you can visit San Luis Potosi weather in May.
When comparing the weather patterns of September and June, it’s evident that both months feature warm temperatures but exhibit some distinct differences. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), averaging around 19°C (66°F), while June presents slightly warmer weather with a minimum of 11°C (52°F) and a maximum of 34°C (93°F), averaging 21°C (69°F). Precipitation levels are quite similar, with September receiving 101 mm (4.0 in) across 15 rainy days and June accumulating 104 mm (4.1 in) over 14 days. Humidity is a bit higher in September at 81%, compared to June's 78%. For a more detailed breakdown of June's weather specifics, you can check San Luis Potosi weather in June.
In comparing the weather of September and July, September tends to be slightly cooler with a minimum temperature of 9°C (49°F) compared to July's 11°C (53°F). The average temperatures are quite similar, with September averaging 19°C (66°F) and July averaging 20°C (68°F). Notably, September sees more rainfall, with precipitation totaling 101 mm (4.0 in) over approximately 15 days, while July receives 91 mm (3.6 in) over 12 days. Furthermore, the humidity in September is higher at 81%, compared to July’s 67%. For more detailed insights, you can check out San Luis Potosi weather in July.
In comparing the weather conditions of September and August, we see a notable shift in temperature and precipitation patterns. September features a lower minimum temperature of 9°C (49°F) compared to August's minimum of 12°C (53°F), while the average temperatures remain relatively close with September at 19°C (66°F) and August at 20°C (68°F). Both months peak at similar maximum temperatures, with September reaching 30°C (87°F) and August slightly higher at 31°C (88°F). However, September experiences significantly more precipitation, totaling 101 mm (4.0 in) over 15 days, in contrast to August's 59 mm (2.3 in) over just 8 days. Additionally, humidity is notably higher in September at 81%, compared to August’s 64%. For a more detailed overview of August weather, you can check San Luis Potosi weather in August.
September typically brings warmer temperatures, with an average high of 30°C (87°F), while October sees a slight decrease, averaging a high of 28°C (83°F). The minimum temperatures also drop, from a pleasant 9°C (49°F) in September to a cooler 4°C (39°F) in October. Rainfall in September is more abundant, with 101 mm (4.0 in) over about 15 days, compared to October's 62 mm (2.4 in) over 10 days, making October a drier month overall. Humidity levels remain relatively high in both months, with September at 81% and October slightly higher at 85%. For a detailed look at the October conditions, check out San Luis Potosi weather in October.
September and November showcase contrasting weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 30°C (87°F), with an average of 19°C (66°F). The month is characterized by considerable rainfall, totaling 101 mm (4.0 in) over 15 days, and humidity levels are relatively high at 81%. In sharp contrast, November experiences cooler temperatures, where the minimum falls to -1°C (31°F) and an average of 15°C (59°F), although the maximum can still reach 29°C (84°F). Precipitation drops significantly to only 19 mm (0.7 in) over just 3 days, alongside slightly higher humidity at 87%. For more detailed information, you can visit San Luis Potosi weather in November.
September and December present distinctly different weather patterns. In September, the temperatures range from a mild 9°C (49°F) at night to a warm 30°C (87°F) during the day, with an average of 19°C (66°F). This month experiences significant rainfall, with 101 mm (4.0 in) of precipitation over 15 days, and humidity levels are relatively high at 81%. In contrast, December sees cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 27°C (81°F), averaging at 13°C (55°F). Notably, December is much drier, receiving only 9 mm (0.3 in) of rain over just 1 day, and the humidity rises slightly to 87%. For more details, you can check San Luis Potosi weather in December.
As September rolls into San Luis Potosi, residents and visitors alike experience a notable shift in the weather. With higher humidity levels and frequent rainfall days, this month stands out as a transition from the drier summer months. The average temperature dips slightly, creating a refreshing contrast to the heat earlier in the season, while the presence of rain nourishes the landscape, making it more vibrant. It's a unique time where the energizing feel of autumn begins to replace summer's warmth. For a deeper dive into the region's annual weather patterns, check out San Luis Potosi Climate.