Last updated: April 22, 2025
In September, San Cristobal, Mexico experiences a delightful climate that balances warm temperatures and refreshing rains. With daily highs reaching up to 30°C (86°F) and an average of 19°C (67°F), the weather is perfect for enjoying the vibrant atmosphere of the city. However, travelers should be prepared for the occasional shower, as the month sees 141 mm (5.5 in) of precipitation over about 16 days, creating a humid environment at 81%. This unique blend of warmth and moisture contributes to the lush surroundings, making September an enticing time to explore San Cristobal's captivating landscapes and rich culture.
In September, San Cristobal experiences a delightful transition as the temperatures begin to cool slightly, providing refreshingly mild weather. The minimum temperature hovers around 9°C (48°F), giving way to an average of 19°C (67°F), with highs reaching up to 30°C (86°F). This month strikes a balance between the heat of summer and the crispness of autumn, making it particularly inviting for outdoor adventures. The gradual decline from the peak temperatures seen in May through August reflects a gentle shift, allowing visitors to enjoy pleasant days and cooler evenings, perfect for exploring the rich culture and breathtaking landscapes of this charming Mexican town.
In September, San Cristobal experiences one of its wettest months, with precipitation reaching 141 mm (5.5 in) over approximately 16 days of rain. This significant amount follows a summer of heavy rainfall, particularly in July and August, which see 142 mm (5.6 in) and 113 mm (4.5 in) respectively. The trend indicates a peak in precipitation as the rainy season approaches its conclusion, marking a noticeable rise from the drying months of the early year. With lush landscapes benefiting from this moisture, September stands out as a crucial time for the region’s ecology, showcasing nature's vibrancy before the transition into drier autumn months.
As September unfolds in San Cristobal, Mexico, the air swells with a noticeable hygrometric embrace, as humidity reaches 81%. This peak in moisture marks a significant rise from the drier months of March and April, which hover around 58%. The summer months contribute to this trend, with June maintaining a high of 76% and gradually giving way to August's 68%. However, it's in September where humidity really asserts itself, setting the stage for the wetter months ahead. Following this trend, October and November will see an even greater uptick, culminating at 84%, hinting at a season filled with lush greenery. As the humidity rises, so does the vibrant life that thrives in this charming locale.
In September, San Cristobal experiences a consistently high UV Index of 14, placing it within the extreme exposure category with a burn time of just 10 minutes. This trend of elevated UV levels has persisted since February, with peak values occurring in April and May. The data shows that while the UV Index fluctuates slightly throughout the summer months, it remains predominantly extreme from February to October, urging residents and visitors alike to prioritize sun protection during their outdoor activities. For detailed insights on UV levels throughout the year, check out San Cristobal UV Index.
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As September unfolds in San Cristobal, it brings with it a delightful blend of warmth and light, with 295 hours of sunshine gracing the skies. This month's sunshine is a charming retreat from the peak brightness of May, which boasts the year's highest at 347 hours. While September's days may be shorter than those of the summer months, it still holds its own against October's 293 hours. The gradual decline from the vibrant summer sun serves as a gentle reminder of the changing seasons, making September a transition time where the landscape shifts beautifully. With its moderate sun, this month invites leisurely days to explore the rich culture and stunning vistas of San Cristobal, basking in the radiant glow that characterizes this charming destination.
In San Cristobal, Mexico, September marks the transition into a notably less sunny month, with the likelihood of clear skies dropping to just 24%. This pattern reflects a significant decrease from the earlier months of the year, particularly the vibrant sunshine seen in February (87%) and March (75%). Following the summer's peak, where the chance of sunshine plummets to the low 30s in June and July, September continues this trend, showcasing a shift towards cloudier conditions and increased rainfall. As autumn approaches, visitors can expect less reliance on sun-soaked days, making it an ideal time for those who prefer mild temperatures and the charm of a softer landscape.
In September, San Cristobal enjoys a generous 12 hours of daylight, a continuation of the longer days that peak in May and June with 13 hours. This gradual tapering of sunlight starts as summer transitions into the milder autumn months, with daylight hours beginning to decline. Following September, the city will experience shorter days as it heads into October and November, where daylight reduces to 11 hours. This pattern highlights a rhythmic shift in the seasonal cycle, where San Cristobal embraces longer days during the summer, followed by a gentle retreat into the cozy embrace of fall.
As September unfolds in San Cristobal, the winds begin to mellow, with an average wind speed of just 2.3 m/s (5 mph), marking it as one of the calmest months of the year. This gentle breeze contrasts sharply with the more invigorating gusts felt in the spring and early summer months, where speeds typically ranged from 3.0 to 3.7 m/s (7 to 8 mph). In fact, as the calendar moves forward from July's breezier tendencies, the wind tends to quiet down further, beginning a gradual decline that extends into the cooler months of late fall and winter. This calming atmosphere in September invites residents and visitors alike to savor the warmer days as they drift into a peaceful transition, setting the stage for the charm and beauty of autumn in the highlands of Mexico.
The weather in San Cristobal 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 Cristobal and find detailed weather information for every month.
In September, the weather is notably warmer, with average temperatures ranging from a minimum of 9°C to a maximum of 30°C, making it feel quite summery. The month experiences significant rainfall, averaging 141 mm over 16 days, contributing to a high humidity of 81%. In contrast, January brings much cooler temperatures, with averages between 0°C and 27°C, and only minimal rainfall of 11 mm across just 2 days. The humidity decreases slightly to 74%, creating a drier, more comfortable feel. For more details on January weather, check out San Cristobal weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a cool 9°C (48°F) at night to a warm 30°C (86°F) during the day, with an average of 19°C (67°F). This month is marked by significant rainfall, totaling 141 mm (5.5 in) over 16 days, contributing to a high humidity level of 81%. In contrast, February offers milder temperatures, with a minimum of 2°C (36°F) and an average of 16°C (61°F), but still reaching highs of 30°C (86°F). Precipitation is minimal in February, accumulating only 10 mm (0.4 in) over just one day, resulting in a lower humidity of 65%. For a more detailed look at the weather in February, you can visit San Cristobal weather in February.
In September, the weather tends to be more variable, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 30°C (86°F) and an average temperature of 19°C (67°F). This month also sees significant rainfall, with about 141 mm (5.5 in) of precipitation spread over 16 days and a high humidity level of 81%. In contrast, March experiences a slightly cooler minimum temperature of 4°C (40°F) while occasionally reaching up to 33°C (91°F) during the day, maintaining an average similar to September at 19°C (67°F). However, March is considerably drier, contributing only 6 mm (0.2 in) of precipitation over just 2 days and featuring a more comfortable humidity level of 58%. For more specific details on March weather, you can visit San Cristobal weather in March.
When comparing the weather in September and April, notable differences emerge. September experiences a wider temperature range, with minimums around 9°C (48°F) and maximums reaching 30°C (86°F), while April's temperatures are generally warmer, with minimums of 7°C (44°F) and maximums peaking at 33°C (92°F). Precipitation levels also vary significantly; September is quite rainy, with an average of 141 mm (5.5 in) over 16 days, whereas April is much drier, seeing only 3 mm (0.1 in) throughout just 1 day. The humidity in September is higher at 81%, compared to April's 58%, contributing to the overall perception of September as a wetter and more humid month. For more detailed insights, check out San Cristobal weather in April.
September and May present quite distinct weather characteristics in terms of temperature and precipitation. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 30°C (86°F), with an average of 19°C (67°F). The month sees a higher level of rainfall, with 141 mm (5.5 in) spread over 16 days, resulting in a humidity level of 81%. In contrast, May experiences milder conditions, with a minimum of 10°C (50°F), an average of 23°C (73°F), and a peak of 36°C (97°F). Rainfall is significantly lower in May at just 26 mm (1.0 in) over 4 days, accompanied by a reduced humidity of 67%. For more information about the May weather, you can visit San Cristobal weather in May.
When comparing the weather in September and June, notable differences emerge. September tends to be cooler, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 30°C (86°F), while June boasts warmer temperatures, averaging between 11°C (52°F) and reaching highs of 35°C (96°F). Despite having slightly more precipitation in September, with 141 mm (5.5 in) over 16 days, June's 128 mm (5.0 in) of rain over 13 days still contributes to its humid conditions. Additionally, September experiences higher humidity levels at 81%, compared to June's 76%. For a more detailed look at the weather patterns, check out San Cristobal weather in June.
In comparing the weather between September and July, September tends to be slightly cooler, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 30°C (86°F), while July experiences slightly warmer temperatures, with minimums at 11°C (53°F) and maximums reaching 32°C (89°F). Both months see similar levels of precipitation, with September receiving 141 mm (5.5 in) over 16 days and July having 142 mm (5.6 in) across 18 days. However, September is noticeably more humid, with humidity levels averaging around 81%, compared to 67% in July. For more detailed information about July weather, you can visit San Cristobal weather in July.
In comparing the weather of September to that of August, we see a noticeable shift in conditions. September experiences slightly cooler temperatures, with an average of 19°C (67°F), compared to August's warmer average of 20°C (69°F). The maximum temperature in September peaks at 30°C (86°F), which is a bit lower than August's high of 32°C (90°F). Additionally, September sees increased rainfall, with 141 mm (5.5 in) over 16 days, while August has 113 mm (4.5 in) over just 12 days. This contributes to September's higher humidity level at 81%, compared to August's 68%. For more detailed insights, you can refer to San Cristobal weather in August.
September and October present notable contrasts in weather, though both months see similar average temperatures. In September, the temperature ranges from a minimum of 9°C (48°F) to a maximum of 30°C (86°F), accompanied by significant precipitation of 141 mm (5.5 in) over 16 days, leading to an average humidity of 81%. In contrast, October shows a slight decrease in minimum temperature to 5°C (41°F) while maintaining the same maximum of 30°C (87°F). It experiences much less rainfall at 53 mm (2.1 in) over just 8 days, with a slightly higher humidity of 83%. For a deeper insight into what to expect, you can check out San Cristobal weather in October.
September and November exhibit notable contrasts in weather patterns. September features a wider temperature range with minimums of 9°C (48°F) and maximums reaching up to 30°C (86°F), showcasing an average temperature of 19°C (67°F). This month also experiences considerable precipitation, with 141 mm (5.5 in) falling over 16 days, contributing to a high humidity of 81%. In contrast, November experiences milder temperatures, with a minimum of 1°C (34°F) and an average of 16°C (62°F), while maximums remain similar at 29°C (85°F). Remarkably, November sees minimal rainfall, with only 14 mm (0.6 in) over just 1 day, resulting in slightly higher humidity levels at 84%. For more information on the weather in November, you can check San Cristobal weather in November.
In September, the weather is characterized by a wider range of temperatures, with a minimum of 9°C (48°F) and a maximum of 30°C (86°F), leading to an average temperature of 19°C (67°F). This month also experiences significant rainfall, with 141 mm (5.5 in) of precipitation spread over 16 days, while humidity remains high at 81%.
In contrast, December sees a drop in temperatures, with a minimum of -2°C (29°F) and a maximum of 27°C (82°F), averaging 14°C (58°F). The month is much drier, with only 7 mm (0.3 in) of precipitation occurring over just one day, while humidity stays consistent at 81%. For more details on the weather during this month, check out San Cristobal weather in December.
As September unfolds in San Cristobal, the weather takes on a character uniquely its own, marked by a notable increase in both humidity and precipitation. Unlike the drier months, this period sees frequent rainfall, which contributes to vibrant landscapes and a refreshing atmosphere. The temperatures are mild, with warm days giving way to cooler nights, creating a pleasant contrast that visitors often find delightful. Overall, September offers an enchanting blend of lush greenery and comfortable weather, making it a special time for those exploring this beautiful region. For more insights into the yearly patterns of weather, check out San Cristobal Climate.