Last updated: April 22, 2025
In September, La Union, Mexico, experiences warm temperatures, with a maximum reaching 35°C (95°F) and an average around 28°C (82°F). As the month progresses, the minimum temperatures can drop to a comfortable 22°C (72°F), providing relief from the heat. However, this period is characterized by significant precipitation, totaling 278 mm (10.9 in) over approximately 19 days, leading to a humid environment with levels averaging 80%. Visitors should prepare for a mix of sunny and rainy days while enjoying the lush green landscapes that the rains bring.
In La Union, Mexico, September experiences warm and inviting temperatures, making it an appealing time for visitors. With average temps hovering around 28°C (82°F), the month presents a pleasant late-summer vibe. Nighttime lows settle at a comfortable 22°C (72°F), ensuring that evenings remain enjoyable. While daytime highs reach up to 35°C (95°F), there is a slight dip compared to the peak summer months of July and August, which see maximums of 36°C (97°F). Overall, September maintains the region's signature warmth, offering a blend of sun-drenched days and mild nights, perfect for outdoor adventures or relaxing on the beach.
September marks a significant peak in precipitation for La Union, Mexico, with an impressive 278 mm (10.9 in) of rainfall recorded over 19 days, making it the wettest month of the year. This surge in rain follows a gradual buildup from the preceding months, particularly May and August, which also experienced substantial downpours of 174 mm (6.9 in) and 175 mm (6.9 in), respectively. The trend indicates a robust monsoon influence during this time, contributing not only to the lush landscape but also to heightened humidity throughout the region. As October follows closely with 266 mm (10.5 in), the rainy season continues, embodying the characteristic climatic pattern of La Union, where September serves as a pivotal transition point into a wetter autumn.
In September, La Union, Mexico, experiences humidity levels at 80%, marking a slight decrease from the peak of 82% observed in August. This transitional month reflects the lingering warmth of summer while hinting at the approach of fall. Notably, the humidity in September is part of a broader pattern throughout the year that showcases a general upward trend during the summer months, peaking in July and August. Following September, humidity levels remain relatively high as they touch 81% in October, emphasizing the region's characteristic tropical climate. This blend of humidity and warmth contributes to the lush landscapes and vibrant atmosphere that define La Union.
In September, La Union, Mexico, experiences an intensely high UV Index of 14, categorizing it as extreme with a burn time of just 10 minutes. This month maintains the trend seen throughout the summer, where UV levels remain consistently high, peaking in previous months. As the region transitions into the fall, the UV Index only slightly drops in October, yet still holds an extreme rating. For those venturing outdoors, it’s crucial to stay protected with sunscreen and seek shade during peak hours. To learn more about the UV Index in La Union, visit La Union UV Index.
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September in La Union, Mexico, offers a delightful blend of warm weather and sunshine, with an impressive 267 hours of sunlight. As summer fades, the days still bask in generous light, though slightly less than the sun-drenched heights of March with its peak of 323 hours. This month marks a transition, exhibiting a gradual decline in sunny hours from the vibrant summer months of July and August, both of which exceeded 300 hours. As the year progresses into October, La Union remains bright but hints at the cozy, shorter days of fall, with an expected 268 hours of sunshine, keeping the spirit of summer alive just a little longer.
As September rolls into La Union, Mexico, the chance of sunny weather takes a noticeable dip, dropping to 16%—the second-lowest of the year. This marks a stark contrast to the sunnier months that precede it, particularly February with 82% sunshine and March at 73%. Following the summer season, where June, July, and August are particularly gray, September continues the trend of limited sun, signaling a shift towards the arrival of the wetter months. The likelihood of clear skies doesn’t pick up again until October at 36%, illustrating how September serves as a transitional period in La Union’s climate. For those planning outdoor activities, it's wise to prepare for a mix of sun and clouds during this time.
In September, La Union, Mexico, enjoys a generous 12 hours of daylight, maintaining the consistent pattern established during the summer months. This month marks the continuation of an extended period of sunlight that spans from March through August, showcasing a wonderful stretch of brightness perfect for outdoor activities and exploration. As the year transitions towards autumn, daylight begins to dwindle in October, dipping back to 11 hours, a shift that heralds the onset of shorter days. The gradual reduction in daylight highlights the region's movement towards its cooler months while still offering ample time to soak in the sun's warm rays in late summer.
As September rolls into La Union, Mexico, the coastal breeze maintains a gentle rhythm with an average wind speed of 1.3 m/s (3 mph). This mild wind mirrors the patterns established over the year, where the early summer months exhibit slightly lower velocities, prompting a serene environment that invites relaxation. Interestingly, from February through April, wind speeds ascend to a peak of 1.6 m/s (4 mph), creating a perfect backdrop for water sports and outdoor activities. However, as we transition into fall, the wind calms down, only to dip to its lowest average by October at 1.1 m/s (2 mph). Overall, September signifies a comforting consistency in the gentle coastal winds, offering both tranquility and just enough breeze to enjoy the warm sun.
The weather in La Union 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 Union and find detailed weather information for every month.
September is characterized by warmer temperatures, with an average of 28°C (82°F) and highs reaching up to 35°C (95°F). The month experiences significant rainfall, totaling 278 mm (10.9 in) over 19 days, contributing to a high humidity level of 80%. In contrast, January presents a cooler climate, with slightly lower temperatures, averaging 27°C (80°F) and minimums of 17°C (63°F). Remarkably, January is much drier, receiving only 2 mm (0.1 in) of precipitation and boasting no rainy days, along with a humidity level of 70%. For more detailed weather insights, check out La Union weather in January.
September typically features warm temperatures, with a minimum of 22°C (72°F) and an average of 28°C (82°F), peaking at a high of 35°C (95°F). This month is characterized by significant rainfall, with an average of 278 mm (10.9 in) spread over 19 days, resulting in high humidity levels of around 80%. In contrast, February offers a slightly cooler temperature range, with a minimum of 18°C (64°F) and a maximum of 36°C (96°F), while maintaining the same average of 28°C (82°F). Notably, precipitation is virtually absent in February, with only 1 mm recorded over the entire month and no rainy days, contributing to a lower humidity of 68%. For more detailed weather information in February, you can visit La Union weather in February.
September and March present notably different weather patterns. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 35°C (95°F), with an average of 28°C (82°F). This month experiences significant rainfall, totaling 278 mm (10.9 in) across 19 days, contributing to a high humidity level of 80%. In contrast, March features slightly cooler temperatures, with a minimum of 21°C (70°F) and a maximum of 36°C (98°F), averaging 29°C (84°F). Remarkably, March sees almost no precipitation, with just 2 mm (0.1 in) recorded, and experiences a much lower humidity level at 64%. For more detailed insights, you can check La Union weather in March.
When comparing the weather in September and April, notable differences emerge. September typically experiences a minimum temperature of 22°C (72°F) and an average of 28°C (82°F), leading up to a maximum of 35°C (95°F). This month is marked by a significant amount of rainfall, totaling 278 mm (10.9 in) across 19 days, coupled with high humidity levels of 80%. In contrast, April boasts slightly cooler minimum temperatures of 21°C (70°F) and a higher average of 30°C (86°F), with extreme highs reaching 38°C (100°F). Precipitation in April is remarkably low at just 18 mm (0.7 in) over 4 days, alongside a more comfortable humidity level of 67%. For more information, you can visit La Union weather in April.
In comparing the weather of September and May, both months exhibit warm temperatures but with notable differences in humidity and precipitation. September has a minimum temperature of 22°C (72°F) and averages around 28°C (82°F), peaking at 35°C (95°F), accompanied by significant rainfall of 278 mm (10.9 in) over 19 days and high humidity levels of 80%. In contrast, May starts slightly warmer with a minimum of 23°C (74°F) and an average of 29°C (84°F), reaching a maximum of 37°C (99°F). However, it features less rainfall, totaling 174 mm (6.9 in) across the same number of days, and lower humidity at 74%. For more detailed insights on May weather in this region, check out La Union weather in May.
In comparing the weather of September and June, both months experience similar average temperatures, with June slightly warmer on average due to its higher minimum temperature of 23°C (74°F) compared to September’s 22°C (72°F). However, September sees an increase in precipitation, with 278 mm (10.9 in) falling over 19 days, in contrast to June’s 241 mm (9.5 in) spread across 20 days. The humidity levels are also marginally higher in September at 80%, compared to June’s 78%. For more details on June weather, you can visit La Union weather in June.
In comparing the weather of September and July, both months experience warm temperatures, with September's minimum at 22°C (72°F) and average at 28°C (82°F), slightly lower than July's maximum of 36°C (98°F). While the average temperatures are fairly similar, September tends to be more humid at 80%, compared to July's 81%. However, September is significantly wetter, with 278 mm (10.9 in) of precipitation over 19 days, compared to July's 75 mm (3.0 in) over just 9 days. For more detailed insights on July weather, you can visit La Union weather in July.
In August, the weather features slightly higher maximum temperatures, reaching up to 36°C (97°F), compared to September's peak of 35°C (95°F). Both months share similar minimum temperatures at 22°C (72°F) and average temperatures hovering around 28°C (82°F). However, September experiences significantly more rainfall, totaling 278 mm (10.9 in) over 19 days, in contrast to August's 175 mm (6.9 in) over 17 days. Additionally, while humidity levels remain fairly consistent, September is slightly less humid at 80% compared to August's 82%. For more details on August weather, you can visit La Union weather in August.
In September, the weather is characterized by higher temperatures, with a minimum of 22°C (72°F), an average of 28°C (82°F), and a maximum reaching 35°C (95°F). The month also experiences significant rainfall, accumulating 278 mm (10.9 in) over 19 days, and humidity levels hover around 80%. In contrast, October sees slightly lower average temperatures, with a minimum of 22°C (72°F), an average of 27°C (81°F), and a maximum of 34°C (93°F). Although rainfall remains substantial at 266 mm (10.5 in), it occurs over more days, with precipitation noted on 21 days, and humidity remains similar at 81%. For more detailed information, you can check La Union weather in October.
September and November exhibit distinct weather patterns, with September generally being warmer and wetter. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 35°C (95°F), averaging at 28°C (82°F), alongside a high precipitation level of 278 mm (10.9 in) over 19 rainy days. In contrast, November features slightly cooler temperatures, where the minimum is 20°C (68°F) and the maximum reaches 34°C (93°F), averaging at 27°C (81°F). Additionally, November experiences significantly less rainfall, totaling just 49 mm (1.9 in) across 6 days, while maintaining the same 80% humidity. For more detailed insights about the weather in November, you can check La Union weather in November.
September weather is characterized by warmer temperatures, with minimums around 22°C (72°F) and maximums peaking at 35°C (95°F), averaging 28°C (82°F). The month also sees a significant amount of rainfall, with 278 mm (10.9 in) recorded over 19 days, creating a humid environment with an average humidity of 80%. In contrast, December experiences milder temperatures, with minimums around 18°C (64°F) and maximums reaching 34°C (93°F), maintaining an average of 27°C (80°F). The precipitation dramatically drops to just 2 mm (0.1 in) over the month, with no rainy days, and a slight decrease in humidity to 75%. For more details on the weather in December, you can check La Union weather in December.
As September unfolds in La Union, it brings a distinct transition from the warmer, drier months. This period is characterized by higher humidity levels, averaging around 80%, which coupled with frequent rain, sets it apart from the preceding summer. The month experiences an average rainfall of 278 mm over approximately 19 days, making it one of the wetter months of the year. Temperatures remain comfortably warm, with average highs of 35°C and lows around 22°C, inviting a vibrant, lush landscape. For a detailed look at La Union's climate throughout the year, check out La Union Climate.