Last updated: April 22, 2025
September in San Cristobal, Mexico showcases a vibrant interplay of temperatures and weather conditions. With maximum temperatures reaching 29°C (84°F) and an average of 18°C (65°F), the climate remains warm yet pleasantly temperate. However, nights can turn cooler, dropping to a refreshing 9°C (48°F). This month experiences significant rainfall, with an average precipitation of 142 mm (5.6 in) spread over approximately 15 days, contributing to the lush landscapes and vibrant greenery. Humidity levels hover around 81%, adding a touch of tropical charm to the atmosphere. Perfect for travelers seeking a mix of warm days and cool nights amidst a beautifully rainy backdrop.
In September, San Cristobal experiences a pleasant transition towards autumn, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 29°C (84°F). The average temperature settles at a comfortable 18°C (65°F), making it an ideal time for outdoor activities and exploration. Compared to the hotter summer months, September offers a slight cool down, especially at night, providing a refreshing atmosphere after the warmer days. This month marks a shift from the peak summer warmth, as September’s temperatures gradually decrease, setting the stage for the cooler months ahead without losing that inviting warmth.
In September, San Cristobal experiences a notable uptick in precipitation, receiving an impressive 142 mm (5.6 in) of rain over approximately 15 days. This month typically marks the peak of the rainy season, contributing significantly to the region's lush landscapes. Following a trend from the previous months, where rainfall gradually increased, September stands out with its highest precipitation levels, outpacing even the wettest months of July and June. This surge not only underscores the city's vibrant biodiversity but also poses challenges, as frequent showers can lead to both the rejuvenation of natural habitats and potential disruptions for daily life. As the rainy season begins to wane, the transition into October offers a drop to 44 mm (1.7 in), signaling the start of a drier phase.
In September, San Cristobal experiences a noticeable rise in humidity, reaching 81%, marking one of the year's peak levels. This increase stands out against the more moderate humidity of previous months, such as August at 64% and July at 67%. The trend suggests a shift as the rainy season progresses, leading into the even more humid months of October and November, which hover between 85% and 87%. The pattern indicates that as the year transitions towards its end, residents and visitors can expect a much more humid atmosphere, making September a pivotal moment in the climatic rhythm of San Cristobal.
As September rolls into San Cristobal, the UV Index remains a striking 14, indicating an extreme level of sun exposure. This aligns with the trend observed throughout the summer months, where the UV Index consistently remained high, forcing outdoor enthusiasts to be extra cautious. With a burn time of just 10 minutes, it's clear that sun protection is a must for anyone planning to venture outside. This pattern of elevated UV levels underscores the importance of vigilance during this time of year, continuing a streak that started in February and peaked in April and May. As you plan your activities, remember to check current conditions to stay informed and safe. For detailed insights, visit San Cristobal UV Index.
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September in San Cristobal, Mexico, is a delightful transition between the vibrant summer months and the cooler autumn days, showcasing 297 hours of sunshine. While this is a noticeable dip from the sun-drenched peak of 350 hours in May, it still offers plenty of bright days to savor outdoor adventures. As autumn approaches, sunshine gradually declines, but September's radiant days bridge the gap perfectly, maintaining a warm atmosphere that invites both locals and visitors to explore. From scenic hikes to bustling markets, the warmth of September's sun enhances every experience, making it a month where nature's beauty shines bright, even as the days begin to shorten.
In San Cristobal, Mexico, September marks a notable dip in the likelihood of sunny weather, with a mere 28% chance of sunshine. This reflects a significant decline from the previous months, illustrating a trend where the summer's higher precipitation levels contribute to cloudier skies. Following the sunny peaks of February, which boasts an impressive 81% chance, and the more favorable conditions of late fall, the transition into September serves as a reminder that while the warmth lingers, the skies can often be overcast. As autumn approaches, visitors may want to prepare for a mix of sun and showers, keeping in mind that the optimal sunny days are still just around the corner in October, when the chance climbs back to 51%.
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 settles in San Cristobal, Mexico, the wind begins to whisper a softer tune, with average speeds dropping to 2.1 m/s (5 mph). This gentle breeze marks a noticeable decline compared to the summer months, where winds were more spirited, averaging 3.0 m/s in August. Throughout the year, there's a clear trend of fluctuating winds, peaking at 3.3 m/s in April before gradually tapering off into the quieter fall season. By September, the atmosphere transforms to embrace a more tranquil ambiance, inviting residents and visitors alike to enjoy the serene beauty of the month. As the winds calm, it’s a reminder of the seasonal shifts in this enchanting locale.
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 present quite contrasting weather patterns. In September, temperatures typically range from a cool 9°C (48°F) to a warm 29°C (84°F), with an average of 18°C (65°F). This month is characterized by significant rainfall, receiving 142 mm (5.6 in) over about 15 days and an humidity level of 81%. In contrast, January experiences much colder temperatures, with a minimum of -1°C (30°F) and an average of 12°C (54°F), peaking at a comfortable 26°C (79°F). Precipitation decreases substantially to just 18 mm (0.7 in) over a mere 3 days, and humidity is slightly lower at 75%. For a closer look at January's conditions, visit San Cristobal weather in January.
September and February present notably different weather patterns. September experiences a wider temperature range, with minimums around 9°C (48°F) and maximums peaking at 29°C (84°F), while February has cooler minimums of 1°C (34°F) and similar maximums reaching 30°C (86°F). Additionally, September sees considerable precipitation, with an average of 142 mm (5.6 in) over 15 days, contributing to a high humidity of 81%. In contrast, February is much drier, receiving only 11 mm (0.4 in) of precipitation across just one day, combined with a lower humidity level of 69%. For a deeper dive into February weather patterns, you can check San Cristobal weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F). This month is characterized by significant rainfall, averaging 142 mm (5.6 in) over 15 days, and high humidity levels at 81%. In contrast, March experiences milder temperatures, with a minimum of 4°C (39°F) and a maximum reaching 33°C (91°F), while maintaining a similar average of 18°C (64°F). The precipitation is notably lower in March, totaling just 9 mm (0.3 in) over only 2 days, and humidity drops to 65%. For a detailed look at the weather specifics for March, visit San Cristobal weather in March.
September and April display contrasting weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F). The month is quite rainy, receiving 142 mm (5.6 in) of precipitation over 15 days, coupled with high humidity at 81%. In comparison, April experiences a milder range of temperatures with a minimum of 5°C (40°F) and a maximum of 33°C (91°F), averaging around 20°C (67°F). Notably, April is much drier, receiving just 7 mm (0.3 in) of precipitation over only 1 day, along with lower humidity at 64%. For a closer look at April weather, visit San Cristobal weather in April.
In comparing the weather of September and May, we find notable differences in temperature and precipitation. September experiences a wider range of temperatures, with a minimum of 9°C (48°F) and a maximum reaching 29°C (84°F), whereas May maintains slightly higher averages, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 34°C (94°F). Furthermore, September is characterized by significantly higher precipitation, averaging 142 mm (5.6 in) over 15 days, compared to May's modest 29 mm (1.1 in) across just 5 days. The humidity levels also vary slightly, with September at 81% and May at 75%, suggesting a more humid feel in the early autumn. For a detailed look at May’s climate, you can refer to San Cristobal weather in May.
September and June display distinct characteristics in their weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F). The month experiences higher precipitation levels at 142 mm (5.6 in) over 15 days, accompanied by a notably high humidity of 81%. In contrast, June tends to be warmer, with temperatures ranging between a minimum of 10°C (51°F) and a maximum of 34°C (94°F), averaging 21°C (70°F). June also sees less rain, with 106 mm (4.2 in) falling over 12 days and a slightly lower humidity of 78%. For a more detailed look at June weather, you can visit San Cristobal weather in June.
September and July present distinct weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F), making it cooler than July, which boasts a minimum of 12°C (53°F) and a maximum of 31°C (87°F) with an average temperature of 20°C (68°F). Both months are relatively wet, but September sees slightly more precipitation at 142 mm (5.6 in) over 15 days compared to July's 131 mm (5.2 in) over 16 days. Additionally, September is much more humid, with levels reaching 81%, while July maintains a more comfortable 67% humidity. For more detailed weather information specifically on July, you can visit San Cristobal weather in July.
In August, the weather tends to be warmer and more stable, with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 31°C (87°F). Precipitation is relatively low, totaling 78 mm (3.1 in) over about 10 days, and humidity levels are more moderate at 64%. In contrast, September sees a noticeable drop in temperatures, with a minimum of 9°C (48°F) and a maximum of 29°C (84°F), while the average temperature decreases to 18°C (65°F). This month also brings increased rainfall, with 142 mm (5.6 in) spread across 15 days and a higher humidity level of 81%. For a detailed look at weather conditions in August, please visit San Cristobal weather in August.
In September, the weather is generally warmer with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), averaging around 18°C (65°F). It is also quite wet, with 142 mm (5.6 in) of precipitation over 15 days, and humidity levels sit at 81%. In contrast, October sees slightly cooler temperatures, dropping to a minimum of 5°C (41°F) and an average of 17°C (64°F), with a maximum of 28°C (83°F). Precipitation decreases significantly to 44 mm (1.7 in) over just 8 days, though humidity rises slightly to 85%. For those looking to learn more about October weather specifics, San Cristobal weather in October offers detailed information.
September and November exhibit notable differences in weather patterns. September typically experiences warmer temperatures, with averages around 18°C (65°F) and highs reaching up to 29°C (84°F), while November cools down considerably with an average of 15°C (59°F) and minimal highs of 28°C (83°F). Additionally, September is marked by significant rainfall, accumulating 142 mm (5.6 in) over 15 days, whereas November sees a drastic reduction in precipitation, with only 16 mm (0.6 in) over just 2 days. Humidity remains relatively high in both months, but it is slightly higher in November at 87%. For more detailed information, you can check San Cristobal weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 18°C (65°F), accompanied by significant rainfall totaling 142 mm (5.6 in) over 15 days, and humidity levels around 81%. In contrast, December sees much cooler temperatures, ranging from a low of -7°C (20°F) to a high of 26°C (80°F), with an average of 12°C (55°F). Additionally, precipitation drops dramatically to just 14 mm (0.6 in) over a single day, while humidity slightly increases to 87%. These differences highlight the shift from the warm, wet conditions of September to the colder, drier atmosphere of December. For more details on December weather specifics, you can check San Cristobal weather in December.
As September rolls in, San Cristobal experiences a notable shift in weather patterns, marked by increased humidity and significant precipitation. While the average temperature remains mild, the month stands out with its peaks and troughs, providing a crisp contrast to the summer months. This transition brings lush greenery to the landscape, but also requires residents and visitors alike to prepare for occasional rainy days. As the atmosphere becomes more vibrant with moisture, September provides a unique charm that differs from the drier spells earlier in the year. For more detailed insights, explore the full San Cristobal Climate.