Last updated: April 22, 2025
September in La Paz, Mexico brings a delightful yet humid climate, with temperatures averaging 18°C (65°F). Daily highs can reach a maximum of 28°C (83°F), while cooler nights dip to a refreshing 8°C (46°F). This month also witnesses significant precipitation, accumulating to 146 mm (5.8 in) over roughly 16 days, contributing to the vibrant landscapes. With an average humidity of 81%, September showcases La Paz’s characteristic tropical ambiance, making it a unique time to explore this enchanting coastal city.
As September rolls into La Paz, Mexico, the temperatures begin to transition into the cooler autumn months. With average highs of 28°C (83°F) giving a warm, inviting feel to the days, evenings cool down pleasantly, reaching lows of 8°C (46°F). This slight dip from the summer peaks reflects a gradual shift in the climate, settling into an average temperature of 18°C (65°F)—a comfortable middle ground perfect for enjoying outdoor activities. Compared to the hotter summer months of June and July, which see max temperatures around 34°C (94°F), September offers a refreshing reprieve, making it an ideal time for travelers looking to explore the stunning landscapes and vibrant culture of the region.
In September, La Paz experiences its peak precipitation, with rainfall totaling 146 mm (5.8 in) over 16 days—the highest of the year. This substantial increase follows a steady climb from the drier months of spring, culminating in a vibrant transition into the fall season. The rainfall, nearly 50% more than August’s 98 mm, signals the height of the monsoon, providing much-needed moisture to the landscape. Such a notable uptick not only nourishes local flora but also shapes the community’s activities, as residents adjust to the rhythm of rain after the drier summer months. This pattern underscores La Paz's climatic variability, as wet seasons can dramatically alter the environment, impacting everything from agriculture to daily life.
In September, La Paz experiences a noticeable rise in humidity, reaching 81%, marking one of the highest levels of the year. This increase continues the trend observed from the summer months, where humidity peaked around 76% in June. As the city transitions into autumn, humidity levels remain elevated, setting the stage for a damp early fall. Following September, October and November see even higher humidity levels, at 83% and 84% respectively, indicating that La Paz's climate remains lush and humid in the final months of the year. This consistent pattern of increasing humidity highlights the city's unique atmospheric conditions as summer wanes and autumn settles in.
In September, La Paz experiences a UV Index of 14, maintaining its status in the extreme exposure category. This trend follows the previous months, where intense sun exposure has been a consistent theme since March. Notably, the burn time remains a quick 10 minutes, highlighting the necessity of sun protection. As the year transitions to autumn, the UV Index begins to slightly decline, but September’s readings underscore the importance of vigilance against UV rays. For more information on protecting yourself from the sun in this beautiful region, visit La Paz UV Index.
UV Risk Categories
September in La Paz, Mexico, continues the tradition of summer's golden glow, offering 292 hours of sunshine. This month marks a gentle decline from August's 329 hours, yet it remains bright as it transitions into autumn. With sunshine peaking in May at 346 hours, there’s a clear pattern of abundance from spring through summer, gradually tapering off into the fall. Despite this slight drop, September's warmth and light create a lasting impression, inviting residents and visitors alike to revel in the enduring luminosity of this charming coastal city. As the days grow shorter, the vibrant sunsets of September still promise plenty of opportunities to bask in the sun-soaked beauty of La Paz.
When considering the likelihood of sunny weather in September in La Paz, Mexico, it's important to note a significant shift in the pattern as summer comes to an end. Emerging from the summer months, which show a strikingly low probability of sunshine—only 22% of the days likely to be sunny in September—a broader trend indicates a clear decline in sunshine compared to earlier months like February (86%) and March (73%). As the seasons change, conditions begin to improve slightly towards October, where the chance of sun rises again to 42%. This fluctuation illustrates how the warm, sunny days of early in the year give way to a more unpredictable climate, leaving September on the lower end of the spectrum for sunshine enthusiasts.
In La Paz, Mexico, September marks a gentle transition into the fall season, featuring approximately 12 hours of daylight. This duration mirrors the longer days of the summer months, providing ample sunlight as the year begins to wane. Following the peak of 13 hours in May through July, daylight starts to taper off slightly in August and remains consistent in September, offering a comforting stability to the city's vibrant outdoor life. As the autumn months approach, La Paz will soon see a gradual decrease in daylight, returning to 11 hours in October, yet September continues to bask in the lingering warmth of the sun, making it an ideal time for exploration and enjoyment of the beautiful landscapes.
As September unfolds in La Paz, Mexico, the average wind speed dips to 2.5 m/s (6 mph), marking it as one of the calmest months of the year. This decline in wind intensity follows a summer of modest breezes, suggesting a gentle transition into the fall season. Compared to the higher speeds of 3.8 m/s in April and August, September’s serene gusts create a tranquil atmosphere, perfect for enjoying the scenic coastal views and vibrant sunsets that define the region. The overall trend reveals a gradual waning of wind as the year progresses, providing a stark contrast to the livelier breezes experienced in the earlier months. With September’s soft winds, La Paz invites visitors and locals alike to savor the serene beauty of its coastal charm.
The weather in La Paz 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 La Paz and find detailed weather information for every month.
September and January showcase contrasting weather conditions in La Paz. September features a broader temperature range with minimums around 8°C (46°F) and maximums reaching 28°C (83°F), leading to an average temperature of 18°C (65°F). It is also much wetter during this month, experiencing 146 mm (5.8 in) of precipitation over 16 days and higher humidity at 81%. In stark contrast, January has cooler temperatures, with minimums dropping to -1°C (31°F) and averaging around 13°C (55°F). Precipitation is significantly lower at just 11 mm (0.4 in) over only 2 days, and the humidity decreases to 74%. For a more detailed overview of January's weather, visit La Paz weather in January.
September and February present contrasting weather conditions. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), with an average of 18°C (65°F). The month is relatively wet, experiencing 146 mm (5.8 in) of precipitation over 16 days and higher humidity at 81%. In contrast, February enjoys milder temperatures, with a minimum of 1°C (35°F) and a maximum of 29°C (84°F), while the average sits at 15°C (59°F). This month is significantly drier, with only 10 mm (0.4 in) of precipitation over just 2 days and lower humidity at 65%. For more detailed information, you can check La Paz weather in February.
In September, the weather is characterized by a generally mild climate, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (83°F) and an average of 18°C (65°F). This month is also notable for its higher precipitation, experiencing 146 mm (5.8 in) over 16 days, contributing to an elevated humidity level of 81%. Conversely, March offers a more varied temperature range, with a minimum of 3°C (37°F) and a maximum of 32°C (89°F), while the average remains around 18°C (64°F). Precipitation is significantly lower in March, with only 9 mm (0.4 in) spread across just 2 days, leading to a more comfortable humidity of 58%. For more detailed information, check La Paz weather in March.
In September, the weather tends to be cooler with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), averaging around 18°C (65°F). This month also sees significant rainfall, with 146 mm (5.8 in) of precipitation over 16 days, contributing to a high humidity level of 81%. In contrast, April offers warmer conditions, with temperatures varying from a minimum of 5°C (42°F) to a high of 32°C (90°F) and an average of 20°C (68°F). Notably, April is much drier, experiencing only 4 mm (0.2 in) of precipitation over just 1 day and a more comfortable humidity level of 58%. For more details on April weather, visit La Paz weather in April.
In comparing the weather of September and May, it's evident that May tends to offer warmer and sunnier conditions. While September features a wider temperature range with lows around 8°C (46°F) and highs reaching up to 28°C (83°F), May consistently showcases a milder temperature profile, with minimums at 9°C (48°F) and maximums soaring up to 34°C (93°F). Additionally, precipitation is significantly lower in May, averaging only 32 mm (1.3 in) over 6 days, compared to September's substantial 146 mm (5.8 in) over 16 days, making September much wetter and more humid at 81%. For a comprehensive look at May's weather, you can refer to La Paz weather in May.
In comparing the weather of September and June, we find that both months experience a range of temperatures, but with notable differences. September tends to be cooler, with a minimum temperature of 8°C (46°F) and a maximum of 28°C (83°F), while June features a slightly warmer range, with min temperatures of 10°C (50°F) and max temperatures reaching up to 34°C (94°F). Additionally, September is characterized by higher average humidity at 81%, compared to June's 76%. Rainfall is also more prevalent in September, with 146 mm (5.8 in) of precipitation over 16 days, whereas June has slightly less at 131 mm (5.2 in) over 14 days. For more specific insights on the conditions during June, you can view La Paz weather in June.
In comparison to July, September experiences slightly cooler temperatures, with a minimum of 8°C (46°F) and a maximum of 28°C (83°F), while July sees temperatures ranging from a minimum of 10°C (50°F) to a maximum of 30°C (86°F). The average temperature in both months is relatively similar, sitting at around 18°C (65°F) in September and 19°C (66°F) in July. However, September is wetter, with 146 mm (5.8 in) of precipitation over 16 days, compared to July’s 125 mm (4.9 in) over 15 days. Additionally, September has a higher humidity level of 81%, compared to July's 67%. For more details on July weather, you can visit La Paz weather in July.
Comparing the weather in September to that of August reveals some notable differences. September experiences cooler temperatures with a minimum of 8°C (46°F) and a maximum of 28°C (83°F), while August tends to be warmer, ranging from a minimum of 11°C (52°F) to a maximum of 31°C (88°F). Precipitation in September is significantly higher at 146 mm (5.8 in) over 16 days, compared to August's 98 mm (3.8 in) over just 11 days. Additionally, September is more humid, with an average humidity of 81%, whereas August has an average of 68%. For more insights on August weather, you can check La Paz weather in August.
In comparing the weather between September and October, we see a notable shift in temperatures and precipitation patterns. September boasts a wider temperature range with a minimum of 8°C (46°F) and a maximum of 28°C (83°F), while October features slightly cooler mornings with a minimum of 3°C (38°F) but maintains a similar high of 29°C (84°F). Precipitation decreases significantly from 146 mm (5.8 in) over 16 days in September to just 57 mm (2.2 in) over 8 days in October, indicating a drier month ahead. Despite the lower average temperature of 17°C (63°F) in October compared to 18°C (65°F) in September, October tends to feel slightly more humid at 83%. For more detailed information, check La Paz weather in October.
September and November exhibit notable differences in weather conditions. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 28°C (83°F), with an average of 18°C (65°F). The month tends to be wetter, experiencing 146 mm (5.8 in) of precipitation over 16 days and maintaining an average humidity of 81%. In contrast, November brings colder temperatures, with a minimum of -1°C (31°F) and the same maximum of 28°C (83°F), but an average temperature of 15°C (59°F). This month is significantly drier, with only 15 mm (0.6 in) of precipitation occurring over just 2 days and slightly higher humidity at 84%. For more detailed weather insights for November, you can check La Paz weather in November.
In September, the weather is notably warmer, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (83°F). The month experiences considerable rainfall, totaling 146 mm (5.8 in) over 16 days, leading to high humidity levels consistently at 81%. In contrast, December brings much cooler temperatures, with lows dipping to -3°C (28°F) and a comfortable high of 26°C (80°F), while the overall average sits at 13°C (56°F). Precipitation is minimal in December, with only 7 mm (0.3 in) recorded on just one day, maintaining similar humidity levels at 81%. For more detailed information, check La Paz weather in December.
September in La Paz is marked by a unique blend of warm and cooler temperatures, setting it apart from other months. With an average temperature of 18°C and a maximum reaching 28°C, the days are pleasantly warm, while nights can dip to a cooler 8°C. However, this month also brings significant rainfall, with 16 days of precipitation contributing to a high humidity level of 81%. This surge in moisture and variability in weather makes September a refreshing transition into the fall season. For a more detailed look at how September's weather compares to the rest of the year, check out La Paz Climate.