Last updated: April 22, 2025
September weather in Nuevo Vallarta, Mexico showcases a tropical climate with average temperatures around 26°C (80°F), peaking at 31°C (88°F). Visitors can expect warmer nights, as lows dip to 23°C (73°F). This month sees a significant amount of precipitation, totaling 358 mm (14.1 in) across 28 days, contributing to an overall humidity level of 78%. Whether you're exploring the lush surroundings or relaxing on the beach, be prepared for frequent rain showers that are typical of this vibrant coastal destination.
September in Nuevo Vallarta, Mexico, marks a delightful continuation of the summer warmth, with temperatures typically ranging from a minimum of 23°C (73°F) to a maximum of 31°C (88°F). As the month progresses, the average temperature settles at a comfortable 26°C (80°F), offering a perfect blend of warmth and mildness for visitors. This is part of a noticeable trend throughout the year, where temperatures gradually rise from January's cooler averages and peak in the sultry heights of July and August. By September, the heat is still palpable, yet the coastal breezes provide a pleasant escape, making it an ideal time for beach lovers and adventure seekers alike. With such inviting conditions, September serves as a bridge toward the more temperate months of October and beyond.
In September, Nuevo Vallarta experiences a significant amount of rainfall, with 358 mm (or 14.1 inches) typically descending over 28 days. This marks a slight decrease from August's peak precipitation of 382 mm but remains one of the wettest months of the year. The transition from summer into fall is apparent, as the region is engulfed in a pattern of nearly daily rain, particularly following the intense storms of July and August. The lush, tropical landscape thrives under this consistent moisture, providing a vibrant backdrop for those visiting during this lush period, despite the frequent downpours. As the month progresses, the rainfall begins to taper off, setting the stage for the drier months ahead.
In September, Nuevo Vallarta experiences a humidity level of 78%, consistent with the high moisture of the preceding summer months and slightly elevated compared to earlier in the year. Following a gradual decline from January's 71% to April's 66%, the humidity begins to rise dramatically starting in June, peaking during the warmest months of July and August. As the summer winds down, September maintains this high humidity, reflecting the region's tropical climate. However, as October approaches, a slight dip to 75% suggests a transition toward drier conditions, paving the way for a more comfortable autumn. This pattern underscores the rhythmic ebb and flow of humidity that defines the allure of Nuevo Vallarta.
In September, Nuevo Vallarta experiences a UV Index of 12, categorizing the sun exposure as extreme. This indicates that even a brief sun exposure could lead to skin damage in just 10 minutes. As summer transitions into autumn, the UV Index remains consistently high, echoing similar figures from the peak summer months of June, July, and August, where the index also hovered around 12 to 13. Notably, although there is a slight decrease from the extreme highs of August, caution is still essential for anyone venturing outdoors. With the UV Index remaining significant through September, sun safety measures such as protective clothing, sunscreen, and shade are highly recommended. For a detailed outlook on UV levels, check the Nuevo Vallarta UV Index.
UV Risk Categories
As summer fades, September in Nuevo Vallarta continues to bask in the warm embrace of sunshine, offering an impressive 257 hours of radiant light. While this marks a decline from the peak months of May and April, it remains a vibrant choice for those seeking a sunny escape. The trend from the previous months shows a gradual decrease in hours of sunshine, with August at 274 hours reflecting the transition into fall. Despite the slight dip, September still glows brightly in comparison to the earlier winter months, emphasizing the region’s consistent allure for sun-seekers year-round. This captivating blend of sunshine and culture makes September a charming option for travelers.
As September rolls into Nuevo Vallarta, the likelihood of sunny weather dips significantly, with only a 22% chance of sunshine. This marks a continuation of a downward trend from the scorching months of May and April, which boasted higher sun exposure at 71% and 66%, respectively. Following a vibrant summer, September's typically cloudy skies contrast sharply with the drier months of March and April, where sun-seekers enjoyed the most favorable weather. Though sunshine may be sparse during this time, the surrounding beauty and warmth of Mexico still provide a delightful backdrop for both relaxation and adventure.
In September, Nuevo Vallarta enjoys a delightful 12 hours of daylight, continuing the trend of ample sunlight established over the summer months. This month marks a subtle shift as the long, sun-filled days of June through August gradually give way to shorter daylight hours leading into autumn. Following the peak of 13 hours of daylight in May, June, and July, September maintains a balance that still invites outdoor activities while hinting at the cozy shorter days ahead. As autumn approaches, visitors can relish in the warm hues of the season, basking in the vibrant atmosphere that characterizes this coastal paradise.
As September rolls into Nuevo Vallarta, Mexico, the gentle whispers of the wind begin to soften, with average speeds dipping to a relaxed 1.3 m/s (3 mph). This trend marks the lowest point of the year, signifying a tranquil transition from the mid-summer months. Following a gradual decline since June, where winds peaked at 1.6 m/s, September's calm breezes create a serene atmosphere, perfect for unwinding by the beach or exploring the lush landscapes. As autumn approaches, the winds gradually regain strength, hinting at a revitalizing change as the region prepares for the lively months ahead.
The weather in Nuevo Vallarta 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 Nuevo Vallarta and find detailed weather information for every month.
In September, the weather is significantly warmer and more humid, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (88°F) and an average of 26°C (80°F). This month also sees high precipitation, with 358 mm (14.1 in) falling over 28 days and humidity levels around 78%. In contrast, January offers a much cooler climate, with temperatures dipping to a minimum of 13°C (56°F), an average temperature of 22°C (71°F), and a maximum of 30°C (85°F). Precipitation is minimal in January, at just 23 mm (0.9 in) over 2 days, accompanied by lower humidity levels of 71%. For more detailed weather information, you can visit Nuevo Vallarta weather in January.
September and February present noticeably different weather patterns. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 31°C (88°F), with an average of 26°C (80°F). This month also sees significant rainfall, with 358 mm (14.1 in) spread over 28 days, contributing to a humidity level of 78%. In contrast, February experiences cooler temperatures, with a minimum of 15°C (59°F) and a maximum of 29°C (84°F), averaging 22°C (71°F). Precipitation is minimal in February, totaling just 29 mm (1.1 in) over 3 days, and humidity is slightly lower at 69%. For a more detailed look at February weather specifics, you can visit Nuevo Vallarta weather in February.
September and March present distinct contrasts in weather. September is characterized by much warmer temperatures, with averages around 26°C (80°F) and highs reaching up to 31°C (88°F). However, it also brings significant rainfall, with a staggering 358 mm (14.1 in) of precipitation spread over 28 days, resulting in high humidity levels of 78%. In contrast, March features milder temperatures, with an average of 22°C (72°F) and a maximum of 29°C (85°F), but it remains mostly dry, seeing less than 1 mm of precipitation across the month and recording no rainy days. The humidity in March is slightly lower at 67%, making the weather feel more comfortable. For more on the March climate, you can check Nuevo Vallarta weather in March.
When comparing the weather in September and April, it's clear that September is significantly warmer and wetter. September boasts temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (88°F), with an average of 26°C (80°F). In stark contrast, April experiences milder temperatures, starting at a minimum of 16°C (61°F) and reaching a maximum of 29°C (84°F), with an average of 23°C (74°F). Additionally, September is characterized by high humidity at 78% and frequent rain, accumulating 358 mm (14.1 in) over 28 days. April, however, is much drier, with only 1 mm (0.0 in) of precipitation and no rainy days at all, making it a more comfortable time to enjoy the outdoors. For more details, you can visit Nuevo Vallarta weather in April.
When comparing the weather in September and May, notable differences emerge. September tends to be much warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (88°F) and a high humidity level at 78%. However, this month experiences significant rainfall, with approximately 358 mm (14.1 in) of precipitation over 28 days. In contrast, May features milder temperatures, with a minimum of 16°C (61°F) and a maximum of 30°C (87°F), combined with low humidity at 69% and virtually no rain, receiving just 4 mm (0.2 in) of precipitation over zero days. For more on what to expect during this time, you can check out Nuevo Vallarta weather in May.
In comparing the weather of September and June, both months experience similar average temperatures, with June averaging 26°C (79°F) and September slightly higher at 26°C (80°F). However, September sees a notable increase in precipitation, with 358 mm (14.1 in) reported over 28 days, compared to June's 171 mm (6.7 in) over just 15 days. The humidity remains constant at 78% for both months, contributing to a tropical feel. For more detailed insights, you can visit Nuevo Vallarta weather in June.
In comparing the weather between September and July, we see that both months maintain similar minimum temperatures, hovering around 23°C (73°F). However, September tends to be slightly cooler on average, with temperatures peaking at 31°C (88°F) compared to July’s maximum of 32°C (89°F). Notably, September receives significantly more rainfall, with 358 mm (14.1 in) falling over 28 days, whereas July has only 192 mm (7.6 in) over 24 days. Humidity levels remain high in both months, with September at 78% and July just marginally lower at 79%. For more specific details on July's weather, you can refer to Nuevo Vallarta weather in July.
In comparing the weather of September and August, both months exhibit similar temperature ranges, with September boasting a minimum of 23°C (73°F), an average of 26°C (80°F), and a maximum of 31°C (88°F), closely mirroring August's figures of 22°C (72°F) minimum, 27°C (81°F) average, and 31°C (89°F) maximum. However, September experiences slightly lower precipitation at 358 mm (14.1 in) over 28 days, compared to August's 382 mm (15.0 in) across 29 days. Both months maintain a consistent humidity level of around 78%. For more detailed insights on the weather, check Nuevo Vallarta weather in August.
September and October exhibit notable differences in weather patterns. September experiences slightly warmer temperatures, with a minimum of 23°C (73°F) and a maximum of 31°C (88°F), while October sees a slight decrease with a minimum of 21°C (71°F) and a maximum of 32°C (90°F). However, October has significantly lower precipitation of 214 mm (8.4 in) over 21 days compared to September's 358 mm (14.1 in) spread across 28 days. Humidity also drops slightly in October to 75%, down from September's 78%. For more specific details on October's weather, check out Nuevo Vallarta weather in October.
September and November present distinct differences in weather patterns. September boasts higher temperatures, with a minimum of 23°C (73°F) and an average of 26°C (80°F), while November is cooler with a minimum of 17°C (63°F) and an average of 25°C (77°F). Though both months can reach a maximum of 31°C (88°F), September is marked by significantly higher precipitation at 358 mm (14.1 in) over 28 days, compared to November's much lighter rainfall of only 30 mm (1.2 in) across 4 days. Humidity levels are also slightly different, with September at 78% and November at 74%. For a more detailed look into the weather specifics in November, you can refer to Nuevo Vallarta weather in November.
In September, the weather is distinctly warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 31°C (88°F) and high precipitation levels of 358 mm (14.1 in) over 28 days. The humidity is also quite notable at 78%, creating a tropical feel. In contrast, December experiences cooler temperatures, with averages from a minimum of 15°C (60°F) to a maximum of 29°C (84°F), and significantly lower precipitation, totaling just 20 mm (0.8 in) over only 3 days. The humidity decreases slightly to 74%, contributing to a more comfortable winter climate. For a closer look at the specifics, check out Nuevo Vallarta weather in December.
As September rolls into Nuevo Vallarta, the weather takes on a unique character distinct from other months. The warmth remains inviting, with average temperatures hovering around a comfortable 26°C (80°F), but it’s the increased humidity and frequent rainfall that set this month apart. With nearly daily precipitation, this time of year ushers in lush greenery, creating a vibrant backdrop for visitors. While summer heat lingers, the abundance of rain also offers a refreshing escape from the sun, making it a great month for those who enjoy the dynamism of tropical weather. To understand more about the annual climate variations, check out Nuevo Vallarta Climate.