Last updated: April 22, 2025
Experience the vibrant September weather of San Juan Mazatlán, Mexico, where temperatures typically peak at a warm 33°C (92°F) and settle at a comfortable average of 24°C (75°F). As the month unfolds, expect to feel the refreshing touch of humidity at an impressive 84%, creating a tropical ambiance. However, be prepared for brisk showers, with 249 mm (9.8 in) of rain expected over 25 days. This blend of warmth and moisture invites both adventure and relaxation, making September a unique time to explore the rich culture and stunning landscapes of Mazatlán.
In September, San Juan Mazatlan experiences warm and pleasant weather, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 33°C (92°F). The average temperature hovers around 24°C (75°F), marking it as one of the more moderate months following the hotter summer. This slight dip in temperature signals the gradual transition into fall, providing a comfortable atmosphere for visitors and locals alike. As the month progresses, you can expect warm days and balmy nights, perfect for enjoying the stunning beaches and vibrant culture that the region has to offer. Overall, September showcases a harmonious blend of warmth, making it an inviting time to experience San Juan Mazatlan’s charm.
In September, San Juan Mazatlan experiences a notable peak in precipitation, with a considerable 249 mm (9.8 in) of rainfall spread over 25 days. This trend continues the wet season's intensity, typically characterized by persistent rains that began in June. The consistency of rainy days, closely resembling the experiences of the previous months, underscores September's role as a crucial part of the monsoon season, contributing to the overall wet climate of the region. As summer transitions to fall, the blend of warmth and humidity often results in lively tropical storms, making it a dynamic time for both locals and visitors to witness the natural beauty of Mazatlan, albeit with an umbrella in tow!
September in San Juan Mazatlán sees humidity levels returning to a cozy 84%, echoing the city’s characteristic tropical climate. As summer winds down, the humidity gradually climbs back up, reflecting a trend observed in earlier months like January and August, which also hover around similar levels. The year starts at a high of 84% in January, dips to a comfortable 67% in April, before consistently rising again through the warmer months. This peak in September distinctly marks the transition towards the end of the wet season, with humidity levels continuing to climb to an average of 89% by October. The fluctuating humidity throughout the year paints a vivid picture of Mazatlán’s vibrant climate, where the air feels rich and lush, enticing residents and visitors alike to embrace the warmth and beauty of this coastal gem.
In September, San Juan Mazatlan continues to bask in the warmth of summer with a UV Index of 13, indicating an extreme level of sun exposure and a rapid burn time of just 10 minutes. This month follows a pattern seen throughout the summer, where the UV Index consistently peaked at 14 from June to August. As the region transitions toward fall, the Index slightly tapers off but remains a critical reminder to protect your skin from prolonged sun exposure. Visitors and locals alike should stay vigilant and consider sun safety practices to enjoy the beautiful outdoor activities that San Juan Mazatlan has to offer. For more detailed insights, visit San Juan Mazatlan UV Index.
UV Risk Categories
September in San Juan Mazatlán is a delightful blend of summer’s warmth and the onset of autumn, boasting 285 hours of glorious sunshine. This month captures the tail end of the sun-soaked summer season, following a peak in hours during July and May, which recorded 321 and 320 hours respectively. As the year progresses, sunlight gradually tapers off, with September highlighting a slight decrease from the vibrant summer months. Yet, the 285 hours still ensure plenty of sunny days to soak up by the beach or explore the picturesque surroundings. With consistent sunshine throughout the month, September offers a perfect opportunity to relish the remaining warmth before transitioning into cooler autumn vibes.
September in San Juan Mazatlan, Mexico, offers a relatively low 14% chance of sunny weather, making it one of the cloudier months of the year. As summer transitions into autumn, the likelihood of sunshine drops significantly, particularly when compared to earlier months like February and March, which enjoy much higher probabilities of clear skies. Additionally, September’s sunshine rates are reminiscent of the rainy summer months, indicating a continuation of the seasonal shift. While the prospects for basking in sunlight may be dim, the warm atmosphere and vibrant local culture provide an enjoyable experience in this coastal gem.
In September, San Juan Mazatlán enjoys 12 hours of daylight, maintaining a balance seen in the previous months of August and May. This period reflects the gradual transition from the longer days of summer, which peak at 13 hours in June and July. As autumn approaches, daylight begins to wane, with October signaling a slight decrease to 11 hours. Overall, the daylight duration trend showcases a gradual ebb and flow, highlighting the vibrant rhythm of seasons in this coastal Mexican paradise, where longer days invite outdoor adventures and sun-soaked relaxation.
In September, the winds in San Juan Mazatlán are gentle, with an average speed of just 1.9 m/s (4 mph). This calm breeze mirrors the tranquil vibe of the month, marking a continuation of the slow wind patterns established over the summer. Following a gradual decline from the more spirited spring winds of 3.0 m/s (7 mph) in April and March, September's breeze is one of the softest of the year. As the season begins to transition into fall, the winds start to pick up slightly again in October, hinting at a shift towards more dynamic weather patterns. This subtle ebb and flow make September an ideal time to enjoy the serene beauty of the coast, with the softer winds contributing to the overall relaxing atmosphere.
The weather in San Juan Mazatlan 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 Juan Mazatlan and find detailed weather information for every month.
September and January present contrasting weather patterns in San Juan Mazatlán. In September, temperatures range from a minimum of 18°C (64°F) to a scorching maximum of 33°C (92°F), with an average temperature of 24°C (75°F). The month is characterized by significant rainfall, totaling 249 mm (9.8 in) over 25 days, while humidity hovers at a high 84%. In contrast, January offers a milder climate with temperatures ranging from a low of 8°C (47°F) to a high of 32°C (90°F), averaging 19°C (66°F). Rainfall is considerably less in January, with only 52 mm (2.1 in) over 10 days, yet the humidity remains consistent at 84%. These differences highlight the transition from the rainy season in September to the drier, cooler conditions of January. For more detailed information, refer to San Juan Mazatlan weather in January.
September and February showcase distinct weather patterns. In September, temperatures range from a minimum of 18°C (64°F) to a hot maximum of 33°C (92°F), with an average temperature of 24°C (75°F). This month is characterized by significant rainfall, accumulating 249 mm (9.8 in) over 25 days and high humidity levels at 84%. In contrast, February offers much cooler temperatures, with a minimum of 8°C (47°F) and an average of 20°C (69°F), while still peaking at 33°C (91°F). Rainfall is minimal in February, totaling only 50 mm (2.0 in) across just 8 days and a slightly lower humidity of 80%. For more information on February weather, you can visit San Juan Mazatlan weather in February.
September and March showcase distinct weather patterns that highlight the transition between the dry and wet seasons. In September, temperatures range from a mild 18°C (64°F) at night to a scorching 33°C (92°F) during the day, with high humidity at 84% and significant rainfall averaging 249 mm (9.8 in) across 25 days. In contrast, March brings cooler nights with a minimum of 10°C (51°F) and moderate daytime temperatures averaging 22°C (71°F) and peaking at 35°C (94°F). Rainfall is drastically reduced in March, totaling just 34 mm (1.3 in) over 7 days, and the humidity drops to 73%. For a closer look at the weather during this month, check out San Juan Mazatlan weather in March.
When comparing the weather in September and April, you'll notice some key differences. September experiences warmer temperatures, with minimums around 18°C (64°F) and maximums reaching up to 33°C (92°F), while April has slightly cooler evenings at a minimum of 13°C (55°F) but can peak at a scorching 35°C (96°F). Additionally, September is characterized by a significant amount of rainfall, totaling 249 mm (9.8 in) over approximately 25 days, resulting in high humidity levels of 84%. In contrast, April sees much less precipitation, with only about 46 mm (1.8 in) over 9 days and lower humidity at 67%. For more details, you can explore San Juan Mazatlan weather in April.
When comparing the weather in September and May, several notable differences emerge. In September, temperatures range from a minimum of 18°C (64°F) to a maximum of 33°C (92°F), while the average temperature sits at 24°C (75°F). The month is characterized by high humidity at 84% and significant precipitation of 249 mm (9.8 in) over 25 days, making it one of the wetter months. In contrast, May features slightly lower temperatures with a minimum of 14°C (57°F) and a maximum of 36°C (96°F), while the average temperature is a comfortable 25°C (78°F). Rainfall in May is considerably less, at 92 mm (3.6 in) across 15 days, and the humidity is lower at 72%. For more detailed insights on May weather, you can check out San Juan Mazatlan weather in May.
When comparing the weather in September and June, both months have similar minimum temperatures, averaging around 18°C (64°F), but June tends to be slightly warmer with maximum temperatures reaching 34°C (93°F) compared to September's peak of 33°C (92°F). In terms of precipitation, June is notably wetter, with 377 mm (14.8 in) of rainfall over 23 days, while September sees 249 mm (9.8 in) over 25 days. Additionally, September's higher humidity at 84% contrasts with June's more comfortable 73%, making September feel more oppressive despite its slightly lower average maximum temperature. For more details on June weather, visit San Juan Mazatlan weather in June.
In comparing September and July weather, both months feature similar minimum and average temperatures, with September slightly warmer, peaking at 33°C (92°F) compared to July's 32°C (90°F). However, September experiences considerably more precipitation, totaling 249 mm (9.8 in) over 25 days, compared to July's 191 mm (7.5 in) over 27 days. Additionally, September has higher humidity at 84%, while July's humidity is slightly lower at 76%. This indicates that while both months are warm, September tends to be wetter and more humid. For more detailed insights into July weather, you can explore San Juan Mazatlan weather in July.
In September, the weather in San Juan Mazatlán features a slight decrease in average temperature compared to August, with September experiencing an average temperature of 24°C (75°F) versus August's 23°C (75°F). While both months have similar minimum and maximum temperatures, September tends to have more rain, with 249 mm (9.8 in) of precipitation over 25 days compared to August's 323 mm (12.7 in) over 27 days. Humidity is slightly higher in September at 84%, compared to 80% in August, contributing to a more humid feel despite the minor temperature changes. For more detailed weather information, check out San Juan Mazatlan weather in August.
September and October both feature warm temperatures, with September seeing a slightly higher average of 24°C (75°F) compared to October's 23°C (73°F). Both months share the same maximum of 33°C (92°F), but September has a higher minimum temperature of 18°C (64°F) compared to October's 14°C (57°F). In terms of precipitation, October experiences slightly more rain at 270 mm (10.6 in) over 20 days, while September has 249 mm (9.8 in) over 25 days. October is also a bit more humid, with an average of 89% compared to September's 84%. For more detailed information, you can refer to San Juan Mazatlan weather in October.
September and November present a stark contrast in weather patterns. September typically features warmer temperatures, with a minimum of 18°C (64°F) and an average of 24°C (75°F), peaking at a maximum of 33°C (92°F). However, it is also quite humid at 84% and experiences considerable rainfall, totaling 249 mm (9.8 in) over 25 days. In comparison, November sees cooler conditions, with temperatures ranging from a low of 10°C (50°F) to an average of 20°C (68°F) and a high of 32°C (89°F). The month is drier, with only 91 mm (3.6 in) of precipitation over just 11 days and slightly higher humidity at 88%. For detailed insights into November weather, check out San Juan Mazatlan weather in November.
September and December present contrasting weather patterns. In September, temperatures are significantly warmer, with a minimum of 18°C (64°F) and an average of 24°C (75°F), reaching a peak of 33°C (92°F). However, this month also brings considerable rainfall, with 249 mm (9.8 in) over 25 days, resulting in high humidity levels at 84%. In comparison, December sees much cooler temperatures, with a minimum of 9°C (48°F) and an average of 19°C (66°F), while the maximum temperature reaches 32°C (89°F). Rainfall is minimal in December, totaling just 40 mm (1.6 in) across 8 days, and humidity slightly increases to 88%. For more information on December weather, check San Juan Mazatlan weather in December.
As September rolls in, San Juan Mazatlan experiences a distinct shift in weather patterns, setting it apart from the milder months preceding it. With temperatures reaching a peak of 33°C (92°F) and an average that hovers around 24°C (75°F), the heat is palpable, especially when coupled with a high humidity of 84%. This month is characterized by its significant rainfall, with nearly 250 mm of precipitation scattered across 25 rainy days, making it one of the wettest times of the year. Travelers should brace themselves for a tropical atmosphere where warm days transition into cooler evenings, perfect for enjoying the local culture. For a deeper dive into what to expect, check out San Juan Mazatlan Climate.