Last updated: April 22, 2025
In September, La Union, Mexico experiences a dynamic climate characterized by warm temperatures and significant rainfall. With maximum daily highs reaching 34°C (94°F) and an average of 26°C (79°F), the weather remains quite warm, while minimums dip to a comfortable 22°C (72°F). This month sees considerable precipitation, totaling 253 mm (10.0 in) over approximately 23 days, resulting in a humid atmosphere with an average humidity of 78%. Visitors should prepare for a mixture of warmth and frequent showers, making for a vibrant albeit wet experience in this lively coastal region.
In September, La Union, Mexico, offers a delightful blend of warmth and mildness, with temperatures reflecting a transition into the cooler months. The minimum temperature hovers around 22°C (72°F), while the average rises to a comfortable 26°C (79°F), peaking at a toasty 34°C (94°F). This month continues the trend of summer, similar to August, yet hints at the coming autumn with slightly cooler nights. As the days remain bright and sunny, the evenings provide a refreshing respite, making September a perfect time for both exploration and relaxation in this vibrant coastal region.
In September, La Union, Mexico, experiences its peak precipitation, with an impressive 253 mm (10.0 in) of rain recorded over 23 days. This significant rainfall marks the culmination of the region's wet season, following a buildup from the preceding months. It notably surpasses the previous month of August, which also saw heavy rains at 215 mm (8.5 in), highlighting September as a vibrant period in the local climate. The trend of increasing precipitation from May through September indicates a strong seasonal pattern, emphasizing La Union's tropical influences and its transition into the drier months that follow. As the rainy season reaches its zenith, the landscape flourishes, showcasing the essential role of this autumnal deluge in supporting the local ecosystem.
In September, La Union, Mexico experiences a humidity level of 78%, maintaining a trend that peaks during the summer months. Following the pattern of rising humidity from 63% in March to 79% in August, September represents a slight decrease but remains comfortably high, signifying the lingering warmth of late summer. This month continues the trend of increasing humidity seen from April through August, before it gradually drops in October to 75%. Overall, September's humidity reflects an ongoing embrace of tropical conditions, perfect for those who enjoy the warmth and moist air before the slight reprieve of autumn.
In September, La Union, Mexico experiences a UV Index of 14, marking it as an extreme exposure period with a burn time of just 10 minutes. This trend of high UV levels has been consistent throughout the summer months, as both July and August also recorded a UV Index of 14 and 12, respectively. The months leading up to September, particularly April and June, have featured similarly intense UV levels. As we transition into autumn, October shows a slight decrease to an Index of 11, but the extreme sun exposure is still a considerable factor. For those planning to enjoy the sun, it’s essential to stay protected during these high-risk periods. For more detailed information, visit La Union UV Index.
UV Risk Categories
As the summer sun begins to wane, September in La Union, Mexico embraces a delightful 269 hours of sunshine, a slight dip from the peak of 335 hours seen in May. The month transitions gracefully from the vibrant summer days, following a pattern of gradually decreasing daylight that continues into the fall. While September's hours are less than the sun-drenched heights of the preceding months, they still offer ample opportunity to enjoy the area's stunning beaches and lively atmosphere. As the warm golden rays linger, La Union invites travelers to savor the last notes of summer before the cooler autumn breezes arrive.
As you plan your visit to La Union, Mexico in September, it's essential to consider the likelihood of sunny weather. With a mere 14% chance of sunshine, September marks the lowest point for sunny days in the region. This trend of limited sunshine begins in June and continues through the summer months, with the sun struggling to make an appearance. Following the vibrant months of January through May, when the chances of sun soar between 61% and 83%, September presents a notable shift, hinting at the onset of the wetter season. If you're craving those sun-soaked days, October shows a slight improvement with a 32% chance, but for late summer outings, be prepared for potential cloud cover.
In La Union, Mexico, September marks a seamless transition in daylight duration, offering approximately 12 hours of sunlight each day. This month reflects a continued trend seen since the summer, where daylight peaks at 13 hours in June and July before gently tapering off. Following a slight decline in August, the consistent 12-hour rhythm of September has a warm reassurance that welcomes the onset of autumn. As the year progresses into October, daylight begins to diminish again, settling into the shorter days characteristic of winter. This cyclical pattern not only enhances the beauty of the region but also invites both locals and visitors to bask in the golden hues of early fall.
As summer transitions to autumn in La Union, Mexico, September ushers in a gentle calm, with average wind speeds dipping to 1.5 m/s (3 mph), the lowest of the year. This decline aligns with the gradual easing of summer's warmth, as the region experiences a shift in climatic patterns. Following the slightly breezy months of April and May, which both saw 2.2 m/s (5 mph) winds, September's lighter winds cast a serene atmosphere, perfect for quiet reflection by the shore. As the year progresses into October, winds pick up slightly to 1.6 m/s (4 mph), hinting at the return of a bit more movement in the air. This subtle rhythm of wind throughout the months highlights La Union's captivating climate, making every season unique in its own right.
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 and January present contrasting weather patterns. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 34°C (94°F), with an average of 26°C (79°F). This month is also characterized by frequent rainfall, totaling 253 mm (10.0 in) over 23 days, coupled with high humidity levels at 78%. In stark contrast, January offers cooler temperatures, with a minimum of 15°C (60°F) and a maximum of 33°C (92°F), and a comfortable average of 24°C (76°F). Notably, January experiences minimal precipitation, with only 4 mm (0.1 in) recorded over 0 days and lower humidity at 66%. For more detailed insights, you can check La Union weather in January.
September and February present a striking contrast in weather conditions. In September, temperatures range from a minimum of 22°C (72°F) to an average of 26°C (79°F), peaking at 34°C (94°F). This month is characterized by significant rainfall, with 253 mm (10.0 in) of precipitation spread over 23 days, resulting in a high humidity level of 78%. In contrast, February offers a milder climate, with temperatures starting at a minimum of 14°C (58°F), averaging at 24°C (76°F), and still reaching up to 34°C (94°F). Notably, February experiences minimal precipitation of just 2 mm (0.1 in) and boasts 0 days of rain, along with a lower humidity of 64%. For further details on February weather, check La Union weather in February.
September and March present quite distinct weather patterns. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 34°C (94°F), with an average of 26°C (79°F). This month is characterized by high precipitation, measuring 253 mm (10.0 in) over 23 days, and a high humidity level of 78%. In contrast, March offers milder temperatures, with a minimum of 16°C (61°F) and an average high of 34°C (94°F), but it enjoys significantly drier conditions, recording no rainfall over 0 days and a lower humidity level of 63%. For more insights on March weather trends, check out La Union weather in March.
September and April present quite a contrast in weather conditions. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 34°C (94°F), with an average of 26°C (79°F). This month is characterized by significant rainfall, receiving 253 mm (10.0 in) over 23 days, leading to a high humidity level of 78%. In contrast, April showcases warmer nights with a minimum temperature of 16°C (61°F) and a maximum of 35°C (95°F), averaging 25°C (77°F). Remarkably, April experiences no rainfall, resulting in a humidity level of just 69%. For more detailed information about April weather, you can visit La Union weather in April.
In comparing the weather in September and May, we see distinct differences in temperature and precipitation. September experiences slightly higher average temperatures with a minimum of 22°C (72°F) and a maximum of 34°C (94°F), while May has a milder minimum of 18°C (64°F) and a peak of 35°C (96°F). However, September is characterized by significantly more rainfall, with 253 mm (10.0 in) spread over 23 days, compared to May's minimal 7 mm (0.3 in) over just 1 day. Additionally, September has a higher humidity level at 78%, whereas May's humidity is a bit lower at 73%. For more details, you can check La Union weather in May.
In September, the weather is characterized by a slightly higher average temperature of 26°C (79°F), similar to June, but with maximum temperatures that can reach up to 34°C (94°F). However, September is notably wetter, with 253 mm (10.0 in) of precipitation spread across 23 days, in contrast to June's 193 mm (7.6 in) over 17 days. Humidity levels are also slightly higher in September at 78%, compared to 76% in June. For more detailed insights, you can refer to La Union weather in June.
In comparing the weather of September to that of July, we see notable differences in precipitation and temperature patterns. September experiences slightly lower minimum and average temperatures, with a minimum of 22°C (72°F) and an average of 26°C (79°F), compared to July's minimum of 23°C (73°F) and average of 27°C (81°F). However, September is significantly wetter, with 253 mm (10.0 in) of rain falling over 23 days, whereas July receives only 97 mm (3.8 in) over 17 days. Both months share a consistent humidity level of 78%. For more detailed insights into July's weather specifics, you can check out La Union weather in July.
In comparing the weather of September and August, both months experience similar temperature ranges, with minimums around 22°C (72°F) and maximums peaking at 34°C (94°F). However, September tends to be slightly cooler on average at 26°C (79°F), compared to August's average of 27°C (80°F). Additionally, September experiences more rainfall, with 253 mm (10.0 in) over 23 days, while August registers less precipitation at 215 mm (8.5 in) during the same number of days. Humidity levels are almost equivalent, with September at 78% and August at 79%. For more detailed insights, you can check La Union weather in August.
In comparing the weather of September and October, we notice a slight decrease in both temperature and precipitation. September showcases a temperature range from a minimum of 22°C (72°F) to a maximum of 34°C (94°F), with an average of 26°C (79°F) and heavy rainfall totaling 253 mm (10.0 in) over 23 days. On the other hand, October experiences a similar average temperature of 26°C (79°F), but with a slightly lower maximum of 33°C (92°F) and a total precipitation of 218 mm (8.6 in) spread across 24 days. Additionally, humidity levels ease from 78% in September to 75% in October, making the latter month feel a bit more comfortable. For more details, you can check the La Union weather in October.
In comparing the weather between September and November, we see a notable transition from the warmth and humidity of early fall to milder conditions as winter approaches. September experiences higher temperatures, with an average of 26°C (79°F) and maximum highs reaching 34°C (94°F), alongside significant rainfall of 253 mm (10.0 in) over 23 days. In contrast, November offers cooler nights with a minimum temperature of 17°C (63°F) and a similar maximum of 34°C (93°F), but with much less rain, totaling only 42 mm (1.7 in) over about 7 days. Humidity also decreases slightly from 78% in September to 72% in November, creating a more comfortable atmosphere for outdoor activities. For more detailed information, you can check La Union weather in November.
September weather is characterized by higher temperatures and significant rainfall, with average daily highs reaching 34°C (94°F) and over 250 mm (10.0 in) of precipitation spread across 23 days. This results in a humid atmosphere, averaging around 78%. In contrast, December sees milder temperatures, with maximums around 33°C (92°F) and a significant drop in precipitation to only 4 mm (0.2 in) over just one day, making for drier and less humid conditions at 70%. For more on December weather specifics, you can check out La Union weather in December.
As September unfolds in La Union, the weather presents a unique character distinct from other months. With average temperatures hovering around a comfortable 26°C, this month experiences high humidity at 78%, enveloping the area in a tropical embrace. However, the real tale lies in the sky, as the region sees a significant amount of rainfall, with precipitation occurring on 23 days and totaling 253 mm. This wet spell contrasts with the drier months, underscoring September's role as a prime time for lush landscapes. Be sure to explore more about the year-round weather patterns at La Union Climate.