September Weather in La Paz, Mexico

Last updated: April 22, 2025

September in La Paz, Mexico, offers a dynamic blend of warm temperatures and seasonal moisture. The mercury soars to a maximum of 38°C (101°F), while the average hovers around a comfortable 26°C (79°F), providing ideal conditions for outdoor activities. As the month progresses, the minimum temperatures dip to a cool 17°C (63°F), especially during the evenings. Rainfall makes its presence felt, with 50 mm (2.0 in) of precipitation spread over 7 days, contributing to the region's lush landscapes. Coupled with a humidity level of 82%, September creates a rich, tropical atmosphere, making La Paz a vibrant destination for travelers seeking both adventure and relaxation.

September Temperature in La Paz

In September, La Paz, Mexico, showcases a delightful transition in climate as summer begins to wane. With minimum temperatures averaging around 17°C (63°F) and daytime highs peaking at 38°C (101°F), the month reflects a balance of warmth that invites both outdoor adventures and coastal relaxation. The average temperature holds steady at 26°C (79°F), slightly cooler than the peak summer months, hinting at a gradual shift toward autumn. While the warm days continue, the evenings start to bring a welcomed reprieve, making September an ideal time to explore the stunning landscapes and vibrant culture of this coastal paradise. As the weather becomes more temperate, it sets the stage for enjoyable activities under the sun without the peak summer heat.

September Weather in La Paz: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Paz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec596672788485838479756761
Data source: Temperature data for La Paz generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in La Paz

In September, La Paz experiences a significant uptick in precipitation, with 50 mm (2.0 in) of rain recorded over seven days. This marks the monsoon season's peak, illustrating a stark contrast to earlier months where rainfall remained minimal. For example, August registered only 20 mm over three days, highlighting September's role as a turning point in the region’s climatic pattern. As the dry spells of the early year give way to increased humidity and vibrant landscapes, the month solidifies its position as a crucial time for both agriculture and natural rejuvenation in this coastal paradise.

September Precipitation Trends in La Paz

The chart displays monthly precipitation patterns in La Paz, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec567271642205031712
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Paz

As September arrives in La Paz, Mexico, residents and visitors alike experience a notable surge in humidity, peaking at 82%. This increase marks a shift from the more moderate levels seen in the earlier months, where the humidity dipped to a refreshing 48% in April. The warmth of summer, particularly in July and August, sets the stage for this rise, creating a notable contrast as the dry season approaches. Following September, the humidity remains elevated, peaking at 84% in December, suggesting that the transition into fall and winter months continues to bring moist air into the region. Overall, the seasonal trends demonstrate a significant upward trajectory in humidity that shapes the climate experience in La Paz during this time of year.

September Average Humidity in La Paz

This chart illustrates the average monthly humidity levels in La Paz, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec70%62%53%48%52%64%73%71%82%83%82%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Paz

As summer transitions into fall, September in La Paz, Mexico, maintains its status with a consistently extreme UV Index of 13. This maxed-out level, mirroring the heights reached during the summer months, demands vigilance, as the burn time is a brisk 10 minutes under direct sunlight. Throughout the year, La Paz experiences a notable trend where high UV levels predominantly rule from February through October, with just mild dips in November and December. Residents and visitors alike should actively monitor their sun exposure and take protective measures, especially during these peak months. For more detailed information, visit the La Paz UV Index.

Maximum UV Index Levels in La Paz for September

The chart shows the monthly maximum UV Index (UVI) for La Paz in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec710121313131313131187
Data source: La Paz September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in La Paz

September in La Paz, Mexico, ushers in a delightful shift as summer begins to wane, yet the sun continues to shine brightly. With 298 hours of sunlight, September maintains a vibrant glow, though slightly less than the peak summer months of July and August, which basked in an impressive 356 and 343 hours respectively. This slight decline signals the transition into fall, as the warm, golden rays invite both locals and travelers to embrace the lingering warmth. Leading up to September, the months show an upward trend in daylight hours—most notably, the jump from 219 hours in January to a summer peak. As the days grow shorter, La Paz’s beautiful surroundings remain awash with light, making it an ideal time to explore its picturesque landscapes and rich marine life before the cooler months approach.

Monthly Sunshine Duration in La Paz: September Highlighted

The September sunshine duration represents the total number of hours La Paz experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec219h262h310h324h353h350h356h343h298h291h272h272h
Data source: La Paz September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in La Paz During September

In La Paz, Mexico, September brings a moderate chance of sunny weather, with a 55% likelihood of sun gracing the skies. This marks a slight uptick compared to the cloudy months of July and August, which see only 52% and 51% chances, respectively. However, September's sunshine potential pales in comparison to the sunnier months like May and April, where the chances soar to 76% and 71%. As summer transitions to autumn, the weather becomes a bit more unpredictable, yet September still offers glimpses of sunshine amidst occasional clouds, setting the stage for a delightful end to the summer season.

Percentage of Sunny Days in September in La Paz

The chart illustrates the percentage of sunny days in La Paz throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often La Paz experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec71%70%64%71%76%66%52%51%55%69%67%61%
Data source: La Paz September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in La Paz in September

In September, La Paz enjoys a harmonious balance with 12 hours of daylight, reflecting a gradual transition as summer edges towards autumn. This duration is consistent with the longer days of the preceding months, peaking at 13 hours in May through July. As the seasons shift, daylight begins to wane, with October marking a decrease to 11 hours. Overall, the trend illustrates a steady increase in daylight from the depths of winter, culminating in a rich summer glow, before gently tapering off towards the end of the year. This rhythmic pattern not only highlights the beauty of La Paz's climate but also sets the stage for the vibrant changes that characterize each season.

Average Daylight Hours in La Paz for September

The chart illustrates the variation in daylight duration in La Paz throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 44m11h 18m12h 1m12h 45m13h 23m13h 41m13h 31m12h 58m12h 15m11h 31m10h 53m10h 34m
Data source: La Paz daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in La Paz

As September rolls into La Paz, Mexico, the gentle whispers of the wind begin to dance around the city, with average gusts reaching 2.6 m/s (6 mph). This mild increase from August reflects a subtle trend of rising wind speeds that peaks in late spring and early summer, where breezes touch 3.2 m/s (7 mph) in June. Following this peak, the winds start to ebb slightly through the early fall before tapering off into the cooler months. While September maintains a pleasant and refreshing atmosphere, it signals the transition towards calmer conditions as autumn approaches, inviting both locals and visitors to enjoy its serene coastal vistas.

Average September Wind Speed in La Paz

The chart displays monthly wind speed patterns in La Paz, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.22.92.93.03.22.42.52.6 m/s2.32.01.9
Data source: La Paz September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in La Paz Compares to Other Months

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 present contrasting weather conditions. In September, temperatures range from a minimum of 17°C (63°F) to a scorching maximum of 38°C (101°F), with an average of 26°C (79°F). This month typically experiences about 50 mm (2.0 in) of rainfall over 7 days, contributing to high humidity levels of 82%. In sharp contrast, January boasts much cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 31°C (88°F), averaging at 15°C (60°F). This winter month is far drier, with only 5 mm (0.2 in) of precipitation on just 1 day and a lower humidity of 70%. For more detailed information about the weather in January, check La Paz weather in January.

September and February exhibit distinct weather patterns, highlighting the transition from summer to winter. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 38°C (101°F), with an average of 26°C (79°F). This month experiences relatively high humidity at 82% and sees approximately 50 mm (2.0 in) of precipitation over about 7 days. In contrast, February presents much cooler conditions, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 36°C (97°F) and an average of 19°C (66°F). Notably, February is quite dry, with only 6 mm (0.2 in) of precipitation and no rainy days recorded. The humidity is also lower at 62%. For more details, check La Paz weather in February.

September and March exhibit notable differences in weather patterns. September tends to be much warmer, with an average temperature of 26°C (79°F) and peaks reaching up to 38°C (101°F). It also experiences higher humidity at 82% and more precipitation, with about 50 mm (2.0 in) falling over approximately 7 days. In contrast, March has cooler temperatures, featuring a minimum of 6°C (43°F) and an average of 22°C (72°F), with maximums slightly rising to 39°C (102°F). The month sees significantly less rainfall—only 7 mm (0.3 in) on just 1 day—and lower humidity at 53%. For further details, you can check La Paz weather in March.

In September, the weather is typically warmer with average temperatures hovering around 26°C (79°F) and occasional highs reaching up to 38°C (101°F). This month also brings higher humidity levels at 82% and about 50 mm (2.0 in) of rainfall over approximately 7 days. Conversely, April features a more temperate climate with similar average temperatures of 26°C (78°F), but it starts off cooler at night with minimum temperatures around 11°C (51°F). April is notably drier, receiving just 2 mm (0.1 in) of precipitation across 0 days, and benefits from lower humidity at 48%. For more details, check out La Paz weather in April.

In comparing the weather between September and May, September tends to be milder with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 38°C (101°F), while May experiences warmer conditions, peaking at up to 41°C (106°F) with an average of 29°C (84°F). September is also characterized by higher humidity at 82%, compared to May's much drier 52%. Additionally, September sees significantly more precipitation, averaging 50 mm (2.0 in) over 7 days, whereas May is relatively dry with just 7 mm (0.3 in) on a single day. For more detailed insights on the weather in May, check La Paz weather in May.

In comparing the weather of September and June, September tends to be slightly cooler with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 38°C (101°F), whereas June is warmer, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 42°C (107°F). June also has lower humidity at 64%, compared to September's higher level of 82%. Precipitation is more frequent in September, with 50 mm (2.0 in) falling over 7 days, while June experiences much less rain, amounting to only 16 mm (0.6 in) over just 3 days. For further details, you can check La Paz weather in June.

When comparing the weather in September and July, September generally presents slightly milder temperatures, with a minimum of 17°C (63°F) and an average of 26°C (79°F), in contrast to July’s minimum of 19°C (67°F) and average of 29°C (84°F). Although both months have similar maximum temperatures, with September reaching up to 38°C (101°F) and July peaking at 39°C (102°F), July experiences higher temperatures overall. Additionally, September sees an increase in humidity at 82%, compared to July's 73%, along with slightly higher precipitation of 50 mm (2.0 in), despite both months having rain on about 7 days. For more detailed insights, you can check La Paz weather in July.

In comparing September and August weather, September's temperatures range from a minimum of 17°C (63°F) to an average of 26°C (79°F) and a maximum of 38°C (101°F), slightly cooling off compared to August, which has a minimum of 18°C (65°F) and an average of 29°C (84°F). While both months experience maximum temperatures of 38°C (100°F or 101°F), September sees increased precipitation, totaling 50 mm (2.0 in) over 7 days, compared to August's 20 mm (0.8 in) over just 3 days. Additionally, September exhibits higher humidity at 82%, contrasting with August's 71%. For more details on the weather during this period, visit La Paz weather in August.

September and October feature notable differences in weather patterns. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 38°C (101°F), with an average of 26°C (79°F). This month experiences higher precipitation levels at 50 mm (2.0 in) over 7 days, and humidity is relatively high at 82%. In contrast, October sees cooler temperatures with a minimum of 8°C (48°F) and a maximum of 37°C (98°F), averaging 24°C (75°F). Precipitation decreases to 31 mm (1.2 in) over just 4 days, while humidity slightly rises to 83%. For more detailed insights, check out La Paz weather in October.

In September, the weather is significantly warmer, with temperatures ranging from a minimum of 17°C (63°F) to a scorching maximum of 38°C (101°F), accompanied by relatively high humidity at 82%. The month experiences moderate rainfall, totaling about 50 mm (2.0 in) over 7 days. In contrast, November brings a cooler climate, with temperatures dropping to a minimum of -1°C (31°F) and averaging 19°C (67°F), while the maximum reaches 34°C (93°F). November enjoys much drier conditions, with only 7 mm (0.3 in) of precipitation expected over just one day, yet humidity remains constant at 82%. For more detailed weather insights, you can check out La Paz weather in November.

In September, the weather is typically warm, with average temperatures around 26°C (79°F), peaking at highs of 38°C (101°F). The humidity level is quite high at 82%, and the month sees around 50 mm (2.0 in) of rainfall over about 7 days. In contrast, December brings a much cooler climate, with average temperatures dropping to 16°C (61°F) and lows reaching as low as -1°C (30°F). Precipitation is significantly reduced, totaling only 12 mm (0.5 in) over about 2 days, while humidity remains relatively stable at 84%. For those interested in experiencing the December weather specifically, more information can be found here: La Paz weather in December.

Compare La Paz's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in La Paz

As September unfolds in La Paz, the weather begins to shift, offering a unique blend of warmth and occasional rainfall that sets it apart from the drier months. The maximum temperatures can soar to an impressive 38°C (101°F), while the average remains comfortably warm at around 26°C (79°F). This transitional month is characterized by humidity levels rising to 82%, making the air feel quite different compared to the preceding dry season. With a total precipitation of 50 mm (2.0 in) spread across 7 days, September marks a notable departure from the arid climate of summer. For a more detailed look at how September fits into the broader context of weather in La Paz, check out La Paz Climate.