Last updated: April 22, 2025
Experience the vibrant weather of San Cristobal, Mexico in September, where temperatures can soar to a maximum of 36°C (97°F), with a comfortable average of 26°C (78°F) and an inviting minimum of 18°C (65°F). This month sees a notable precipitation total of 168 mm (6.6 in), spread across approximately 19 days, contributing to the lush green landscapes. With humidity levels reaching 84%, prepare for a tropical climate that accentuates the region's rich culture and stunning natural beauty. From balmy afternoons to refreshing rain showers, September offers a unique and exhilarating experience in this charming destination.
September in San Cristobal, Mexico, brings a refreshing transition as temperatures gradually begin to cool from the summer peak. With a minimum of 18°C (65°F) and a pleasant average of 26°C (78°F), the month strikes a balance between warmth and comfort. Daytime highs reach around 36°C (97°F), still retaining some of the summer heat, yet the nights invite a more moderate feel. As the rainy season approaches, the air feels rejuvenated, making September an ideal time for outdoor exploration and enjoying the vibrant culture of this charming town. Overall, this month showcases a shift towards milder temperatures while still holding onto the warmth of the season.
In September, San Cristobal experiences significant rainfall, accumulating 168 mm (6.6 in) over approximately 19 days, creating a lush, vibrant landscape. This marks a slight decrease from the 171 mm (6.7 in) recorded in August but continues the trend of heavy precipitation characteristic of the region's rainy season. Following a peak in June with a staggering 319 mm, September rounds out the summer months and transitions toward a tapering October, when rainfall drops to 110 mm (4.3 in). The frequency of precipitation during September demonstrates the persistence of moisture in the air, contributing to the region's rich biodiversity as the wet season gradually comes to a close.
In September, San Cristobal experiences a return to higher humidity levels, reaching 84%, which mirrors the conditions seen at the beginning of the year. This revitalization in moisture comes after a gradual rise throughout the summer months, peaking in July at 76% and remaining elevated until now. Notably, as the year progresses into the fall, humidity tends to intensify, evidenced by the dramatic jump to 89% in October and persisting through the end of the year. The trends suggest that September serves as a transitional period, where warm summer remnants intersect with the approaching cooler and wetter months, creating a thick, humid atmosphere that is characteristic of this vibrant region.
In September, San Cristobal, Mexico, experiences a notably high UV Index of 14, categorizing it as extreme and necessitating a cautious approach to sun exposure, with a burn time of just 10 minutes. This trend of elevated UV levels extends from April through September, peaking at 14 during these months, which indicates a consistent need for sun protection. As the year progresses into the autumn months, a slight decrease occurs, with October dropping to a UV Index of 12. For residents and visitors alike, understanding these trends is crucial for enjoying the vibrant outdoors while safeguarding against harmful UV rays. For more detailed information, check out San Cristobal UV Index.
UV Risk Categories
September in San Cristobal, Mexico, basks in a delightful 287 hours of sunshine, offering a warm embrace as summer transitions into autumn. This month reflects a slight dip from the peak sunshine of July and March, which boast impressive totals of 325 and 323 hours respectively. However, September remains a vibrant time, with ample sunlight that invites exploration and outdoor activities. As the year progresses, it becomes clear that sunshine tends to decrease slightly during the later months, yet September holds its own, ensuring residents and visitors alike can still enjoy plenty of bright days before the cooler season sets in.
In September, San Cristobal, Mexico, experiences a notably low 15% chance of sunny weather, making it one of the cloudiest months of the year. This trend follows a gradual decline in sun exposure throughout the summer, peaking at a modest 29% in July and dropping further in August. After the wet season, the likelihood of sunny days is markedly sparse, contrasting sharply with the brighter months of late fall and winter, where sunshine can be expected 71% in November and a striking 82% in December. Thus, if you're planning a trip in September, be prepared for a higher chance of rain than sun in this lush, vibrant region.
In September, San Cristobal enjoys a generous 12 hours of daylight, continuing the trend seen throughout the summer months. As the year transitions from the extended sunlight of June, which boasts 13 hours, daylight durations settle at 12 hours from March to September, creating a period of stability that is perfect for enjoying the region's natural beauty. This consistency gives way to shorter days as October approaches, where daylight reduces to 11 hours, marking the beginning of the gradual decline in sunlight leading towards winter. Overall, September serves as a beautiful bridge between summer's brilliance and the impending autumnal shift.
As September arrives in San Cristobal, Mexico, the gentle embrace of the wind begins to slow down, with an average speed of just 1.6 m/s (4 mph). This marks a noticeable dip from the slightly breezier summer months, reflecting a trend of diminishing wind speeds as the season transitions. Following a peak in November, where winds pick up to 3.2 m/s (7 mph), the cooling air fosters a serene atmosphere perfect for leisurely strolls through the charming streets. This calm September breeze enhances the town's tranquil vibe, inviting residents and visitors alike to bask in the beauty of the changing landscape.
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.
September and January represent distinct contrasts in weather. In September, temperatures range from a minimum of 18°C (65°F) to a maximum of 36°C (97°F), with an average temperature of 26°C (78°F). This month is characterized by substantial rainfall, receiving about 168 mm (6.6 in) of precipitation over 19 days, while humidity remains high at 84%. Conversely, January experiences milder temperatures, with a minimum of 10°C (51°F), an average of 22°C (72°F), and the same maximum of 36°C (96°F). Notably, January is much drier, with only 5 mm (0.2 in) of precipitation over 0 days, while humidity remains consistent at 84%. For more detailed information on January weather, visit San Cristobal weather in January.
September and February present contrasting weather patterns. September typically showcases a warmer climate with average temperatures ranging from 18°C (65°F) to a peak of 36°C (97°F), combined with high humidity at 84% and significant rainfall of 168 mm (6.6 in) over 19 days. In stark contrast, February offers a milder environment; temperatures hover between 11°C (52°F) and 36°C (97°F) with a lower average of 23°C (74°F). This month enjoys minimal precipitation, with only 7 mm (0.3 in) falling over just 2 days and humidity slightly lower at 80%. For more details on February's weather, visit San Cristobal weather in February.
In comparing the weather of September and March, we see notable differences in temperature, precipitation, and humidity. September experiences a minimum temperature of 18°C (65°F) and an average of 26°C (78°F), with maximum temperatures reaching up to 36°C (97°F). Additionally, this month is marked by significant rainfall, totaling 168 mm (6.6 in) over approximately 19 days, contributing to a high humidity level of 84%. In contrast, March features cooler morning temperatures with a minimum of 12°C (54°F) and a similar average of 25°C (77°F). Interestingly, while maximum temperatures can also peak at 36°C (98°F), March is considerably drier, with just 3 mm (0.1 in) of precipitation across no rainy days, resulting in a lower humidity of 73%. For more detailed information about the weather during this month, you can check San Cristobal weather in March.
When comparing the weather in September and April, we see some notable differences. September tends to be warmer at night, with a minimum temperature of 18°C (65°F) compared to April's 15°C (59°F). However, both months have a similar average temperature of around 26°C (78°F). Notably, April can reach higher daytime temperatures, with a maximum of 38°C (101°F), while September peaks at 36°C (97°F). Precipitation is significantly higher in September, with 168 mm (6.6 in) over 19 days, whereas April experiences only 15 mm (0.6 in) over just 2 days. This results in much higher humidity in September at 84%, compared to April's 67%. For more details on April weather, you can check San Cristobal weather in April.
In September, temperatures range from a comfortable minimum of 18°C (65°F) to a hot maximum of 36°C (97°F), averaging around 26°C (78°F). However, the month is characterized by high humidity at 84% and substantial precipitation, with 168 mm (6.6 in) of rain over 19 days. In contrast, May experiences slightly lower humidity at 72% and significantly less rainfall—only 68 mm (2.7 in) across 11 days—while still reaching a maximum temperature of 38°C (100°F) and an average of 27°C (81°F). For more detailed insights, you can check out San Cristobal weather in May.
In comparing the weather between September and June, both months exhibit similar average temperatures, hovering around 26°C (79°F). However, September tends to be slightly warmer at night, with a minimum temperature of 18°C (65°F) compared to 19°C (67°F) in June. Notably, June experiences significantly higher precipitation, averaging 319 mm (12.5 in) over 20 days, whereas September sees a reduction to 168 mm (6.6 in) over 19 days. Additionally, September's humidity level is considerably higher at 84%, compared to June's 73%. For more detailed insights, you can check San Cristobal weather in June.
In comparing the weather between September and July, September features slightly cooler temperatures, with a minimum of 18°C (65°F) and an average of 26°C (78°F), while July has a higher minimum of 20°C (67°F) and an average of 27°C (80°F). July experiences hotter days with a maximum reaching up to 38°C (100°F), compared to September's maximum of 36°C (97°F). Additionally, September is marked by significantly higher precipitation levels, receiving 168 mm (6.6 in) over 19 days, whereas July has only 87 mm (3.4 in) over 14 days. Despite this, July maintains a lower humidity level of 76%, compared to September's 84%. For more specific details on July weather, visit San Cristobal weather in July.
In comparing the weather of September and August, both months feature similar average temperatures, hovering around 26°C (78°F), but September experiences slightly cooler minimum and maximum temperatures, with a range of 18°C (65°F) to 36°C (97°F), compared to August's range of 19°C (66°F) to 37°C (99°F). Precipitation levels are also comparable, with September receiving 168 mm (6.6 in) over 19 days, while August has 171 mm (6.7 in) across 18 days, indicating a slightly wetter September. Additionally, September's humidity is a touch higher at 84%, compared to August's 80%. For more detailed information on August weather, you can refer to San Cristobal weather in August.
In comparing the weather between September and October, we see a slight decrease in average temperatures, with September averaging 26°C (78°F) compared to October's 25°C (78°F). However, October experiences a notable increase in maximum temperatures, peaking at 37°C (99°F), compared to 36°C (97°F) in September. Precipitation levels also decline, with September receiving 168 mm (6.6 in) over 19 days, while October sees only 110 mm (4.3 in) over 12 days. Interestingly, humidity rises from 84% in September to 89% in October, making the air feel a bit more humid as fall progresses. For more detailed information, check out the San Cristobal weather in October.
September and November showcase a notable shift in weather patterns. In September, temperatures typically range from a minimum of 18°C (65°F) to a maximum of 36°C (97°F), with an average temperature of 26°C (78°F). This month is characterized by considerable precipitation, with 168 mm (6.6 in) falling over 19 days, contributing to a humidity level of 84%. In contrast, November brings cooler temperatures, with a minimum of 13°C (55°F) and a maximum of 37°C (98°F), but an average of 24°C (75°F) indicates a more temperate experience overall. Significantly, November sees much less rainfall, recording only 7 mm (0.3 in) over just 1 day, although humidity slightly increases to 88%. For more detailed insights, check out San Cristobal weather in November.
The weather in September tends to be hotter and more humid, with average temperatures around 26°C (78°F) and highs reaching up to 36°C (97°F). It's also quite wet, experiencing around 168 mm (6.6 in) of precipitation over 19 days, making it feel even stickier with a humidity level of 84%. In contrast, December experiences milder temperatures, averaging 22°C (73°F) with maximums of 35°C (95°F). Notably, December is much drier, with only 7 mm (0.3 in) of precipitation and no rainy days, despite a slightly higher humidity at 88%. For more detailed insights into December weather, you can check San Cristobal weather in December.
September in San Cristobal is characterized by a unique blend of warmth and moisture, setting it apart from other months. With average temperatures hovering around a comfortable 26°C (78°F), it's a humid time of year, particularly marked by a high humidity rate of 84%, creating a tropical feel. This month also brings significant rainfall, with nearly 19 days of precipitation contributing to a total of 168 mm (6.6 in). Compared to the drier, cooler months that define the region's climate, September offers a lush, vibrant landscape, ideal for those who appreciate the rich beauty of nature during a rainy season. For a deeper dive into the full scope of San Cristobal's weather throughout the year, visit San Cristobal Climate.