Last updated: April 22, 2025
In September, San Andres, Mexico, displays a captivating blend of summer warmth and refreshing breezes. With maximum temperatures reaching 28°C (83°F) and a comforting average of 18°C (65°F), the days are pleasantly warm. However, nights can bring a chill with minimum temperatures dipping to 9°C (49°F). This month also experiences significant precipitation, totaling 100 mm (3.9 in) across about 12 rainy days, contributing to the region’s lush landscapes. Coupled with a high humidity level of 81%, the weather creates a tropical atmosphere perfect for both exploration and relaxation.
As September settles in San Andres, Mexico, the temperatures begin to soften, offering a delightful respite from the summer heat. With a minimum temperature of 9°C (49°F) and a comfortable average around 18°C (65°F), the month signifies a transition towards cooler days. The maximum temperature peaks at 28°C (83°F), creating a pleasant climate ideal for outdoor exploration and relaxation. Overall, September marks a gradual decrease from the more intense summer warmth of July and August, inviting visitors to enjoy the gentle embrace of early autumn in this charming locale.
September marks a notable peak in precipitation for San Andres, Mexico, as the region receives 100 mm (about 3.9 inches) of rainfall over 12 days. This surge follows the trend observed throughout the summer months, where rainfall gradually escalated from 56 mm in August to September's significant total. The wet season clearly establishes itself during these months, with precipitation levels sharply rising compared to the drier beginnings of the year, which saw only a few millimeters of rain spread across just a couple of days. As September transitions the region deeper into autumn, the balance of rain and dry days sets the stage for continued shifts in weather patterns, marking a transformative period for both the landscape and local climate.
As September rolls into San Andres, Mexico, the humidity peaks at 81%, marking a notable increase from the previous months. This transition highlights a trend of rising humidity that begins in the summer, where June reaches 78% and July dips to 67% before the humidity climbs once again. Following September, the moisture in the air continues to escalate, reaching 85% in October and 87% in both November and December. This steady rise reflects the approach of the rainy season, where humidity levels consistently remain high, creating a lush, vibrant atmosphere as the year draws to a close.
As September settles over San Andres, the UV Index remains a striking 14, placing it firmly in the extreme exposure category with a burn time of just 10 minutes. This value continues the trend observed over the preceding months, where the UV Index consistently soared to elevated heights, particularly from February through August. With summer's intensity carrying over into early autumn, it's vital for sunbathers and outdoor enthusiasts alike to remain vigilant and protect their skin during this period. For those planning outdoor activities, understanding the persistent high levels of UV radiation this September is essential for ensuring safety and enjoyment. Explore more about what to expect in San Andres at San Andres UV Index.
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September in San Andres, Mexico, basks in 295 hours of sunshine, marking a delightful transition into the fall. As the summer months peak, with May enjoying the most sun at 347 hours, September maintains a generous amount of sunlight, though it shows a slight decline as it shifts away from the high days of summer. With August and July closely trailing above 330 hours, the coastal charm of San Andres remains vibrant in September, inviting visitors to enjoy the beautiful beaches and outdoor adventures before the sun's warmth begins to wane. The trend of consistent sunshine throughout the year indicates that while September might not boast the highest count of sun hours, it certainly holds its own, ensuring that the pleasures of summer linger a bit longer for all who visit.
As summer fades away, September in San Andres, Mexico, brings a notable dip in sunshine, with only a 26% chance of clear skies. This decline marks a stark contrast to the sun-drenched months that precede it, particularly February with a striking 80% likelihood of sunshine. Following the peak of summer, where July and June saw a steep drop in sunny days, September continues this trend, making it one of the least sunny months of the year. If you're planning a trip at this time, be prepared for the possibility of cloudier skies and intermittent rain, leaving the latter part of the year—especially November and December—a much sunnier prospect.
As September rolls in, San Andres, Mexico enjoys a pleasant 12 hours of daylight, which reflects a gradual transition from the summer months of June through August, where daylight peaked at 13 hours. This consistency in daylight duration marks a balance between the lingering warmth of summer and the approaching cooler autumn months. While the locals bask in the golden hours of late summer sun, they can anticipate a gentle reduction as October brings a slight dip to 11 hours. Overall, September in San Andres provides a harmonious blend of light and warmth, perfect for outdoor adventures and exploration.
In September, the enchanting winds of San Andres, Mexico, whisper gently at an average speed of 3.1 m/s (7 mph), marking a subtle drop from the vibrant breezes of the summer months. This decline continues a trend observed as the year transitions from the hotter season, with wind speeds peaking in August at 4.3 m/s (10 mph). As the year progresses, particularly from late summer to early fall, the winds tend to mellow, providing a more tranquil atmosphere. Interestingly, September maintains similar wind conditions to October and November, showcasing a consistent calm before the arrival of winter's softer breezes. This gentle shift in wind patterns invites both relaxation and reflection, perfect for soaking in the serene coastal beauty of San Andres.
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 September, the weather features a wide temperature range, with minimums around 9°C (49°F) and maximums reaching up to 28°C (83°F), averaging 18°C (65°F). The month is relatively humid, with an average humidity of 81% and significant rainfall, totaling 100 mm (3.9 in) over 12 days. In contrast, January brings a cooler climate, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 26°C (79°F), averaging 12°C (54°F). The winter month is much drier, experiencing only 12 mm (0.5 in) of precipitation over just 2 days and featuring lower humidity at 75%. For more details about January weather, you can refer to San Andres weather in January.
September and February exhibit distinctly different weather patterns. In September, temperatures range from a mild minimum of 9°C (49°F) to a warm maximum of 28°C (83°F), with an average of 18°C (65°F). The month experiences significant precipitation, totaling 100 mm (3.9 in) over 12 days, and high humidity at 81%. In contrast, February offers cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 30°C (87°F), but an average of only 15°C (59°F). This month sees much less rainfall—just 10 mm (0.4 in) over 2 days—and lower humidity at 69%. For more detailed insights on February weather, visit San Andres weather in February.
September and March showcase contrasting weather patterns. In September, temperatures range from a cooler minimum of 9°C (49°F) to an average of 18°C (65°F), with highs peaking at 28°C (83°F). This month also experiences considerable rainfall, averaging 100 mm (3.9 in) over 12 days and a high humidity of 81%. In comparison, March presents slightly milder conditions with a minimum of 1°C (33°F) and an average temperature similar to September at 17°C (63°F), but it can reach up to a warm 32°C (90°F). March is notably drier, with only 13 mm (0.5 in) of precipitation across just 2 days and a lower humidity of 65%. For a detailed look at the weather specifics in March, visit San Andres weather in March.
In comparing the weather of September and April, one can observe distinct differences in temperature and precipitation. September typically sees temperatures ranging from a minimum of 9°C (49°F) to a maximum of 28°C (83°F), with an average of 18°C (65°F). It also experiences more rainfall, averaging 100 mm (3.9 in) over about 12 days, contributing to a higher humidity of 81%. In contrast, April tends to be warmer, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 32°C (90°F) and an average of 19°C (67°F). April is much drier, with only 10 mm (0.4 in) of precipitation over just 2 days and lower humidity at 64%. For more detailed information about April weather, you can visit San Andres weather in April.
In comparing the weather of September and May, September tends to be more variable, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 28°C (83°F) and an average of 18°C (65°F). This month also experiences higher humidity at 81% and increased precipitation, with around 100 mm (3.9 in) spread over 12 days. In contrast, May is generally warmer and drier, featuring a temperature range from 7°C (45°F) to 34°C (93°F) and an average of 21°C (70°F). The precipitation in May is significantly lower, at 41 mm (1.6 in) over just 6 days, along with a humidity level of 75%. For more information on May weather, you can check San Andres weather in May.
September weather shows cooler temperatures than June, with average highs reaching 28°C (83°F) compared to June's warmer 33°C (91°F). While both months experience similar precipitation levels at 100 mm (3.9 in) over approximately 12 days, September tends to feel more humid, averaging 81% compared to June's 78%. Overall, September marks the transition into autumn, offering a milder climate than the warmer, more humid June days. For more details on June weather patterns, you can check San Andres weather in June.
In comparing the weather of September and July, we can observe some notable differences. September typically experiences a wider range of temperatures, with minimums dropping to 9°C (49°F) and maximums reaching up to 28°C (83°F), while July maintains a slightly warmer profile, with minimum temperatures of 11°C (52°F) and maximums peaking at 30°C (86°F). Additionally, September is wetter, receiving about 100 mm (3.9 in) of precipitation over 12 days, compared to July’s 89 mm (3.5 in) over 9 days. The humidity is also higher in September at 81%, compared to July’s 67%. For more specific insights about July's climate, see San Andres weather in July.
September weather is cooler and more humid compared to August, with minimum temperatures dropping to 9°C (49°F) and maximums reaching 28°C (83°F). In contrast, August features a slightly warmer range, with minimum temperatures of 11°C (52°F) and peaks of 30°C (86°F). Additionally, September experiences more precipitation, totaling 100 mm (3.9 in) over 12 days, while August has only 56 mm (2.2 in) over 7 days. The humidity also rises significantly in September to 81%, compared to 64% in August. For a closer look at August weather details, you can visit San Andres weather in August.
September and October exhibit noticeable shifts in weather patterns. September tends to be warmer, with average temperatures around 18°C (65°F) and maximum highs reaching 28°C (83°F), while October sees a slight drop in the minimum temperature to 3°C (38°F) and an average of 17°C (62°F). Precipitation also decreases from 100 mm (3.9 in) in September over 12 days to 50 mm (2.0 in) across 9 days in October, indicating a transition to drier conditions. Humidity levels remain relatively high, with September at 81% and October slightly higher at 85%. For more detailed information, you can visit San Andres weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a mild 9°C (49°F) at night to a warm average of 18°C (65°F), peaking at 28°C (83°F) during the day. This month experiences about 100 mm (3.9 in) of rainfall over 12 days, contributing to a humidity level of 81%. In contrast, November sees a notable drop in nighttime lows, reaching as low as -1°C (30°F), with an average temperature of 14°C (58°F) and highs of 27°C (82°F). Precipitation in November is minimal, totaling just 14 mm (0.6 in) over 2 days, although humidity rises slightly to 87%. For more detailed information on weather specifics in November, you can check San Andres weather in November.
In September, the weather is warm and dynamic, with temperatures ranging from a cool 9°C (49°F) at night to a pleasant 28°C (83°F) during the day, and average precipitation of 100 mm (3.9 in) spread across 12 days. The humidity is relatively high at 81%, contributing to a humid but comfortable atmosphere. In contrast, December brings a notable change, featuring cooler temperatures that drop to a minimum of -6°C (21°F) and can reach a maximum of 26°C (79°F). This month experiences significantly less rainfall, with only 10 mm (0.4 in) of precipitation over just 1 day, although the humidity remains elevated at 87%. For those interested in more details, visit San Andres weather in December.
As September unfolds in San Andres, it brings a distinct shift in weather, characterized by mild temperatures and increased humidity. While daytime highs hover around a comfortable 28°C, evenings cool down, presenting a refreshing contrast to the warmer months. This time of year is also marked by significant rainfall, averaging about 100 mm over approximately half the month, making it one of the wetter periods. With humidity levels peaking at 81%, visitors can expect a lush, vibrant atmosphere. For those seeking insights on seasonal trends, explore more at San Andres Climate.