Last updated: April 22, 2025
September in San Luis Potosi, Mexico, is characterized by a mild and humid climate, with an average temperature hovering around 21°C (70°F). Daily highs can reach up to 28°C (83°F), while evenings can be pleasantly cool, dropping to a minimum of 14°C (58°F). This month sees significant rainfall, totaling approximately 197 mm (7.8 in), across an average of 24 days. With an overall humidity level of 77%, the weather can feel particularly lush, making it a vibrant time to experience the natural beauty of the region.
In September, San Luis Potosí experiences a delightful transition as temperatures begin to cool slightly, with a minimum of 14°C (58°F) and an average of 21°C (70°F), while the maximum reaches a comfortable 28°C (83°F). This month marks the transition from the warmer summer months, as evenings become refreshingly crisp. The consistent averages from the previous months create a pleasant, inviting atmosphere, making September an ideal time to explore the city's rich culture and stunning landscapes. As the rainy season draws to a close, you can expect a mix of sunny days and occasional showers, adding to the region's vibrant allure.
In September, San Luis Potosi experiences a notable increase in precipitation, with 197 mm (7.8 in) falling over 24 days, making it one of the wettest months of the year. This uptick in rainfall is a continuation of the region's escalating trend from the summer months, particularly following the significant downpours of June and August. The intense rainfall during September paves the way for lush landscapes, a refreshing shift that contrasts sharply with the drier, cooler months that lie ahead. As the rainy season peaks, the frequent precipitation not only sustains the region's natural beauty but also underscores the seasonal rhythm that defines San Luis Potosi's climate.
As the seasons transition in San Luis Potosi, September marks a notable increase in humidity, rising to 77%. This month signals a return to more humid conditions after the drier months of spring and early summer, with values steadily climbing from a low of 52% in April to the peak of 86% in December. The gradual uptick in humidity from August’s 71% to September reflects the influence of the approaching rainy season, ensuring that the air feels noticeably heavier. Following this trend, October and November maintain similar humidity levels, hovering around the high 70s and low 80s, reinforcing the characteristic tropical comfort of San Luis Potosi as the year draws to a close.
In September, the UV Index in San Luis Potosi, Mexico remains consistently high at 14, falling within the extreme exposure category. This trend of elevated UV levels continues from the summer months of June through August, which also recorded the same critical index. With a burn time of just 10 minutes, residents and visitors must be particularly vigilant about sun protection. As the month transitions into fall, the UV Index slightly decreases in October, but it still advises caution. For those planning to spend time outdoors, it's essential to stay informed; for more details, visit San Luis Potosi UV Index.
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September in San Luis Potosí is graced with 306 hours of sunshine, maintaining a delightful warmth as summer transitions into autumn. This month follows the peak of the sunniest season, with July and August boasting impressive totals of 334 and 326 hours, respectively. The overall trend showcases a vibrant summer that lingers well into September, making it a splendid time for both locals and visitors to soak in the sun. As daylight gently declines into October, which enjoys 301 hours, the gradual decrease remains a comforting reminder of the beautiful sunshine that characterizes this region throughout the year. With consistent bright days, September presents a perfect opportunity to revel in outdoor adventures against the stunning backdrop of San Luis Potosí.
In San Luis Potosí, Mexico, September maintains a relatively modest likelihood of sunny weather, with only a 24% chance of sunshine. This figure mirrors the clouds that often hang over the region during the late summer months, as seen in August (20%) and July (21%). Interestingly, this dip in sunshine coincides with an overall trend of lower sun exposure from June through early autumn. While the chance of clear skies begins to improve in October (36%), September remains characteristic of the lingering summer rains, making the sun a somewhat elusive companion this time of year. With the shift towards more favorable conditions in the following months, September can feel like a transitional pause, hinting at the brighter days ahead.
In September, San Luis Potosi enjoys a delightful 12 hours of daylight, maintaining the same hours as the preceding months of August and July. This vibrant consistency in daylight duration signifies the tail end of the summer season, as the sun gradually begins its descent towards the shorter days of autumn. From March to September, daylight hours peak at 12 to 13 hours, reflecting the region’s natural rhythms. As we transition into October, daylight will begin to taper off again to 11 hours, marking a return to the cozy embrace of shorter days. This pattern highlights the stunning shift in seasons, providing a captivating backdrop for outdoor activities in this picturesque part of Mexico.
As September arrives in San Luis Potosi, Mexico, the winds begin to soften, with an average speed of 1.2 m/s (3 mph). This subtle decline continues from the previous months, echoing a trend of gentle breezes that define the late summer transition into autumn. Interestingly, the wind speeds have gradually ebbed from their peak in March, where they reached 1.7 m/s (4 mph). With September's calm winds, locals and visitors alike can enjoy the serene atmosphere, even as the earth prepares for the seasonal shift. The consistency of gentle winds throughout the year creates a harmonious backdrop for the vibrant culture and stunning landscapes of the region.
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.
In September, the weather is generally warmer, with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 28°C (83°F). This month also experiences significant rainfall, with 197 mm (7.8 in) of precipitation spread over approximately 24 days and humidity levels around 77%. In contrast, January sees cooler temperatures, with a minimum of 6°C (42°F) and an average high of 29°C (84°F). The precipitation in January is much less, totaling 81 mm (3.2 in) over about 14 days, and the humidity is slightly higher at 84%. For a detailed overview, check San Luis Potosi weather in January.
September and February present a stark contrast in weather conditions. In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 28°C (83°F), with an average of 21°C (70°F). This month experiences significant rainfall, with 197 mm (7.8 in) spread over 24 days, resulting in high humidity levels of 77%. In contrast, February offers milder temperatures that vary from a minimum of 6°C (42°F) to a maximum of 32°C (89°F), averaging 17°C (64°F). February is much drier, with only 53 mm (2.1 in) of precipitation occurring over 11 days and slightly lower humidity at 73%. For a detailed overview of February weather, you can check San Luis Potosi weather in February.
September and March present distinct contrasts in weather. September boasts a milder temperature range, with minimums around 14°C (58°F) and maximums peaking at 28°C (83°F), and is characterized by higher humidity at 77%. This month also sees significant precipitation, averaging 197 mm (7.8 in) over 24 days, making it a notably wet period. In contrast, March experiences cooler minimum temperatures of 6°C (44°F) but can reach a maximum of 32°C (89°F), offering warmer daytime temperatures. Additionally, March is much drier, with only 46 mm (1.8 in) of rain over just 10 days and lower humidity at 59%. For a more detailed overview, you can check San Luis Potosi weather in March.
In comparing the weather of September and April, we can see notable differences in temperature, precipitation, and humidity. September enjoys a warmer climate with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 28°C (83°F), though it experiences significantly higher precipitation levels at 197 mm (7.8 in) over 24 days, contributing to a humidity of 77%. In contrast, April features a cooler range with minimum temperatures of 9°C (48°F) and maximums reaching 34°C (94°F), yet it boasts much less rainfall at only 55 mm (2.2 in) across 10 days and lower humidity at 52%. For more details on the April climate, visit San Luis Potosi weather in April.
September and May showcase notable differences in weather patterns. In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 28°C (83°F), with an average of 21°C (70°F), while the month is characterized by high humidity at 77% and frequent rainfall, totaling 197 mm (7.8 in) over 24 days. In contrast, May boasts slightly warmer temperatures, with a minimum of 13°C (55°F), an average of 22°C (72°F), and a peak of 35°C (96°F). This month tends to be drier, with only 132 mm (5.2 in) of precipitation spread over 19 days and lower humidity at 53%. For more detailed insights, check out San Luis Potosi weather in May.
September and June share similar minimum and average temperatures, with September averaging around 21°C (70°F) and June peaking at a higher maximum of 33°C (91°F). However, September experiences significantly more precipitation, averaging 197 mm (7.8 in) across 24 days, compared to June’s 297 mm (11.7 in) over 26 days. Additionally, June tends to be less humid at 55% relative humidity, while September’s humidity rises to 77%. For more insights into June's weather characteristics, check out this link: San Luis Potosi weather in June.
When comparing the weather in September and July, September tends to be slightly warmer with average temperatures ranging from 14°C (58°F) to 28°C (83°F), while July has a slightly lower average, peaking between 12°C (54°F) and 29°C (84°F). Notably, September experiences significantly more rainfall, with 197 mm (7.8 in) over 24 days compared to July's 104 mm (4.1 in) over 22 days. Additionally, the humidity level is higher in September at 77%, compared to 61% in July, making September feel more muggy despite its warmer temperatures. For a more detailed overview, you can visit San Luis Potosi weather in July.
In comparing the weather of September and August, we observe some notable differences. September experiences slightly higher minimum temperatures, averaging 14°C (58°F) compared to August's 12°C (55°F), and while the average temperature remains the same at 21°C (70°F), the maximum temperature in August reaches a warmer 30°C (87°F) against September's peak of 28°C (83°F). Precipitation is more abundant in September, with 197 mm (7.8 in) falling over 24 days, compared to August's 159 mm (6.2 in) over 22 days. Moreover, September also tends to be more humid, with levels averaging 77% compared to August's 71%. For a closer look at August conditions, you can check out San Luis Potosi weather in August.
In September, the weather typically features a minimum temperature of 14°C (58°F) and averages around 21°C (70°F), with maximums reaching up to 28°C (83°F). The month's precipitation amounts to 197 mm (7.8 in), occurring across 24 days, and the humidity levels hover around 77%. In contrast, October sees slightly cooler temperatures, with a minimum of 12°C (55°F) and an average of 20°C (69°F), while the maximum can peak at 30°C (86°F). Although the precipitation increases to 205 mm (8.1 in) over 23 days, humidity rises marginally to 78%. For more detailed information, check out San Luis Potosi weather in October.
In September, the weather is generally warmer with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 28°C (83°F) and an average of around 21°C (70°F). This month also experiences higher precipitation levels, with 197 mm (7.8 in) over 24 days and humidity at 77%. In contrast, November brings cooler temperatures, with a minimum of 8°C (46°F) and an average of 18°C (65°F), peaking at 29°C (85°F). Rainfall decreases significantly to 113 mm (4.4 in) over 15 days, while humidity rises slightly to 82%. For more detailed information, you can visit San Luis Potosi weather in November.
In September, the weather remains relatively warm, showcasing a minimum temperature of 14°C (58°F) and reaching an average of 21°C (70°F), with highs peaking at 28°C (83°F). This month experiences significant rainfall, totaling 197 mm (7.8 in) across 24 days, which contributes to a humidity level of 77%. In contrast, December brings cooler conditions, with temperatures ranging from a minimum of 5°C (41°F) to an average of 17°C (63°F), while still allowing for warm highs of 28°C (83°F). The precipitation decreases substantially to 63 mm (2.5 in) spread over only 13 days, accompanied by a higher humidity level of 86%. For more details, check out San Luis Potosi weather in December.
September in San Luis Potosí marks a transition, bringing a noticeable shift in weather compared to the drier months that precede it. With increased humidity and frequent rain, this month is characterized by a lush, refreshed landscape, making it an ideal time for nature lovers to explore. The average temperatures remain comfortable, hovering around 21°C, but the occasional downpours can surprise even the most prepared travelers. While this month sees a higher number of rainy days, it also offers vibrant greenery and a unique charm that sets it apart from the hotter, dryer summer months. For a deeper understanding of how September's weather fits into the broader climatic patterns of the region, visit San Luis Potosi Climate.