Last updated: April 22, 2025
In September, San Andres, Mexico experiences a tropical climate characterized by mild to warm temperatures. The maximum temperature hovers around 29°C (85°F), while the average is a comfortable 21°C (70°F), dipping to a pleasant minimum of 15°C (59°F) at night. However, this month is notably marked by high humidity levels of 82%, contributing to a feeling of warmth. Rainfall is a significant feature, with a substantial precipitation total of 214 mm (8.4 in) spread over 26 rainy days, ensuring the landscape remains lush and vibrant. Visitors should prepare for the possibility of rain while enjoying the warm, tropical atmosphere that defines September in this beautiful region.
In September, San Andres, Mexico, experiences a transition marked by mild temperatures and a gentle decline from the summer heat. The month opens with a minimum of 15°C (59°F), gradually cooling to an average of 21°C (70°F), before reaching a comfortable maximum of 29°C (85°F). This slight dip from the peak summer highs suggests a shift toward a more temperate climate, making it an ideal time for outdoor activities and exploration. Visitors can enjoy pleasant days without the oppressive heat, while evenings remain comfortably warm, perfect for soaking in the vibrant local culture and stunning landscapes.
September marks a significant point in the precipitation cycle of San Andres, Mexico, with 214 mm (8.4 in) of rainfall recorded over 26 days. This month continues the trend established in the summer, where rainfall peaks, often leading to lush landscapes and vibrant surroundings. Following the heavy deluge of August with 219 mm (8.6 in), September sees only a slight decrease, illustrating a persistent wet season. The frequency of rainy days also remains high, matching July and August’s levels and emphasizing the region's characteristic tropical climate. This pattern indicates that as summer transitions to fall, residents can expect continued showers that contribute to the area's rich biodiversity and agricultural vitality.
In September, San Andres experiences a notable rise in humidity, reaching 82%, which marks a significant increase from the drier months of mid-summer, particularly July and August, where levels dipped to 68% and 70%, respectively. This uptick in moisture can create a more tropical feel as the summer heat begins to fade, setting the stage for the wetter months ahead. As the year progresses into the fall, humidity levels continue their ascent, peaking in October at a substantial 91%. Overall, September serves as a transitional month, highlighting the gradual return to more humid conditions that characterize the latter part of the year in this picturesque coastal destination.
As September rolls into San Andres, Mexico, the UV Index remains at a striking 14, categorized as extreme. This trend, consistent with the intense levels observed throughout the summer months, indicates that sun protection is paramount during this period. With a burn time of just 10 minutes, outdoor enthusiasts should be particularly vigilant about applying sunscreen and seeking shade to avoid harmful effects from the sun. Following September, the UV Index drops slightly in October to 12, yet remains in the extreme category. These patterns highlight the importance of staying informed and prepared for sun exposure, making resources like the San Andres UV Index essential for safe outdoor adventures.
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As the sun sets on summer and welcomes the start of fall, September in San Andres, Mexico continues to bask in the warm glow of sunshine, boasting 280 hours of radiant daylight. Following the peak of May, which enjoys the most sun with 335 hours, the month shows a gentle decline but remains robust compared to the earlier months of the year. The sunshine hours in September echo the consistent warmth of July and August, making it an ideal time for beach lovers and outdoor adventurers. Despite a slight dip from the summer highs, the sun still graces September with ample light, ensuring that visitors and locals alike can revel in the beautiful coastal scenery under a bright blue sky.
In San Andres, Mexico, September offers a notably low chance of sunny weather, with only 15% likelihood of sunshine gracing the skies. This trend marks a significant dip from the sunnier months leading up to September, with February boasting a remarkable 91% chance and April still holding a respectable 73%. As summer transitions into fall, the skies tend to cloud over, leading into the rainy season, making September one of the cloudiest months of the year. Consequently, travelers hoping for beach outings might want to plan their trips earlier in the summer for the best chances of sunshine.
In September, San Andres, Mexico enjoys 12 hours of daylight, continuing the transition from the longer days of summer. This month marks a gradual shift from the peak brightness of the previous months, as daylight duration begins to recede towards the winter months ahead. Following the consistent 13 hours experienced in both June and July, and the steady 12 hours in August, September maintains this balanced sunlight before the days start to shorten again in October. Such trends highlight a rhythmic cadence in daylight, offering residents and visitors alike the chance to revel in the vibrant beauty of early autumn while still basking in ample sunshine.
As September arrives in San Andres, Mexico, the gentle caress of the wind becomes a defining feature of the landscape. With an average wind speed of 1.2 m/s (3 mph), this month marks a slight dip in breeziness compared to the preceding summer months. The trend shows a gradual decline from June to September, where winds shift from a more lively 1.2 to 1.9 m/s before stabilizing. This mellow breeze offers a perfect backdrop for serene beach days and tranquil sunset evenings, subtly hinting at the transitional nature of the approaching fall. As the year winds down, the average speeds begin to rebound slightly in October, but September remains an invitingly calm chapter of the coastal experience.
The weather in San Andres 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 Andres and find detailed weather information for every month.
In comparing the weather between September and January, we can observe notable differences. September experiences a wider temperature range, with minimums around 15°C (59°F) and maximums reaching up to 29°C (85°F), while January has cooler nights with a minimum of 6°C (43°F) but can soar to a similar maximum of 31°C (88°F). September is characterized by significant rainfall, averaging 214 mm (8.4 in) over 26 days, creating a humid environment with an average humidity of 82%. In contrast, January is much drier, with only 2 mm (0.1 in) of precipitation, and enjoys dry conditions with no recorded rainy days, reflected in a slightly higher humidity level of 84%. For more details, you can check out the San Andres weather in January.
September and February present strikingly different weather patterns. In September, temperatures range from a mild 15°C (59°F) to a warm 29°C (85°F), with an average of 21°C (70°F). This month experiences significant rainfall, accumulating 214 mm (8.4 in) over 26 days, resulting in a high humidity of 82%. In contrast, February boasts a lower minimum temperature of 8°C (47°F) while still reaching a maximum of 32°C (90°F) and an average of 20°C (69°F). Remarkably, February sees little to no precipitation, with only 2 mm (0.1 in) recorded, across zero rainy days, and a lower humidity of 78%. For a deeper look into the February weather specifics, check out San Andres weather in February.
In comparing the weather of September and March, there are notable differences in temperature and precipitation. September typically sees temperatures ranging from a minimum of 15°C (59°F) to a maximum of 29°C (85°F), while March showcases a broader range with a minimum of 11°C (53°F) and a peak temperature of 35°C (95°F). Precipitation also varies significantly; September experiences 214 mm (8.4 in) of rainfall over 26 days, making it quite wet, whereas March is much drier, receiving only 6 mm (0.2 in) on just 1 day. Additionally, humidity is higher in September at 82%, compared to 75% in March. For more detailed weather insights for March, you can visit San Andres weather in March.
In comparing the weather between September and April, September tends to be wetter and cooler. During September, temperatures range from a minimum of 15°C (59°F) to a maximum of 29°C (85°F), with an average of 21°C (70°F). This month sees significant rainfall, with 214 mm (8.4 inches) spread over 26 days and a humidity level of 82%. In contrast, April offers warmer conditions, with temperatures ranging from a minimum of 12°C (53°F) to a sweltering maximum of 35°C (96°F), averaging 24°C (76°F). April is also notably drier, receiving only 18 mm (0.7 inches) of precipitation over just 4 days, coupled with a lower humidity of 70%. For more detailed information about April weather specifics, check out San Andres weather in April.
When comparing the weather in September and May, we see notable differences in temperature and precipitation. September experiences a cooler average temperature of 21°C (70°F) with maximums reaching up to 29°C (85°F), while May boasts warmer averages at 24°C (76°F) and highs that can soar to 35°C (95°F). Additionally, September is much wetter, receiving 214 mm (8.4 in) of rain over 26 days, compared to May's 94 mm (3.7 in) of rain over just 14 days. Humidity levels are also relatively high in both months, with September slightly higher at 82% compared to May's 77%. For more details on the specific conditions in May, you can check San Andres weather in May.
When comparing the weather in September to that of June, both months exhibit warm temperatures, but June is notably hotter with average highs reaching 34°C (93°F) compared to September's maximum of 29°C (85°F). The minimum temperatures are quite similar, with June starting at 15°C (60°F) and September at 15°C (59°F). Moreover, while both months see considerable rainfall, June has a slightly higher precipitation total of 260 mm (10.2 in) over 25 days, compared to September’s 214 mm (8.4 in) across 26 days. Humidity levels are also a bit different, with September being more humid at 82% versus June’s 76%. For a detailed look at June's conditions, visit San Andres weather in June.
In comparing the weather of September and July, we see notable differences in temperatures and precipitation. September boasts a minimum temperature of 15°C (59°F) and an average of 21°C (70°F), with a maximum reaching 29°C (85°F). In contrast, July has slightly warmer temperatures, with a minimum of 14°C (58°F), an average of 22°C (72°F), and a peak of 32°C (89°F).
However, September experiences significantly higher precipitation, measuring 214 mm (8.4 in) over 26 days compared to July's 151 mm (5.9 in) over 20 days, leading to a spike in humidity levels in September at 82%, while July maintains a more comfortable 68% humidity. For more details on July weather, you can visit San Andres weather in July.
In comparing the weather of September and August, we see some notable differences. While both months start with a minimum temperature of 15°C (59°F), August has a slightly warmer average of 22°C (71°F) and a higher maximum of 31°C (88°F) compared to September's average of 21°C (70°F) and maximum of 29°C (85°F). Precipitation levels are quite similar, with September receiving 214 mm (8.4 in) over 26 days and August slightly higher at 219 mm (8.6 in) over 25 days. Additionally, September experiences a higher humidity level at 82%, while August maintains a lower humidity of 70%. For a detailed look at the weather specifics of August, you can refer to this link: San Andres weather in August.
In September, the weather tends to be warm and humid, with average temperatures around 21°C (70°F) and a maximum of 29°C (85°F). The month is characterized by significant rainfall, accumulating 214 mm (8.4 in) over 26 days, resulting in a humidity level of 82%. In contrast, October experiences slightly cooler temperatures, with a minimum of 12°C (54°F) and a maximum reaching 31°C (87°F), yet it maintains the same average of 21°C (70°F). Rainfall decreases significantly to 115 mm (4.5 in) over 19 days, leading to increased humidity at 91%. For more detailed information, check out San Andres weather in October.
September and November present contrasting weather patterns as summer transitions into autumn. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 29°C (85°F), with an average of 21°C (70°F). This month experiences significant rainfall, averaging 214 mm (8.4 in) over 26 days, contributing to a high humidity level of 82%. In contrast, November features warmer nights with a minimum temperature of 8°C (47°F) and a comfortable maximum of 30°C (87°F), but with much less rainfall, totaling only 32 mm (1.3 in) over just 5 days. The humidity in November rises slightly to 89%, creating a different feel in the air. For a detailed look at the weather in this month, visit San Andres weather in November.
September and December present contrasting weather conditions. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 29°C (85°F), with an average of 21°C (70°F). The month is characterized by high precipitation, totaling 214 mm (8.4 in) over 26 days, and humidity levels at 82%. In contrast, December experiences cooler temperatures, with a minimum of 7°C (44°F) and an average of 19°C (66°F), though it can still reach up to 29°C (85°F). Remarkably dry, December sees only 2 mm (0.1 in) of precipitation over 0 days and has higher humidity at 88%. For a detailed overview of December weather, visit San Andres weather in December.
September in San Andres stands out as a month of challenges and transitions in weather patterns. With average temperatures hovering around a mild 21°C, it's noticeably cooler compared to the peak summer months. However, this month also brings high humidity levels and frequent rain, with precipitation occurring on nearly every day. The lush landscapes are nourished by the 214 mm of rain, creating a vibrant, verdant environment. While September is often seen as a quieter time for visitors, those who embrace its unique climate are rewarded with a more tranquil experience. For those interested in understanding more about San Andres' weather patterns throughout the year, be sure to visit San Andres Climate.