Last updated: August 21, 2025
September in La Union, Ecuador experiences a cool and wet climate, with maximum temperatures reaching a comfortable 18°C (64°F) and dipping to an average of 10°C (50°F) by night. The city sees a minimum temperature of 3°C (38°F), making warm clothing a necessity for residents and visitors alike. This month is characterized by significant precipitation, totaling 88 mm (3.5 in) over 16 rainy days, contributing to a lush environment and elevated humidity levels around 62%. Overall, September offers a unique blend of chilly air and refreshing rain, ideal for those who appreciate vibrant, green landscapes.
In September, La Union, Ecuador experiences a subtle shift in temperatures as the year begins to transition from its cooler months. The minimum temperature hovers around 3°C (38°F), while the average is a crisp 10°C (50°F), and the maximum reaches a mild 18°C (64°F). This month mirrors the trends observed in August and July, where cooler evenings and moderate daytime warmth persist. As the temperatures gradually rise towards the end of the year, September serves as a gentle reminder of the cooler climate that defines La Union's enchanting highland atmosphere. The overall stability in the temperatures highlights the region's consistent climate, making it a serene escape for those who appreciate a cooler, tranquil setting.
In September, La Union, Ecuador, experiences a notable dip in precipitation, receiving only 88 mm (3.5 in) of rain over 16 days. This marks a significant decrease from the heavier rains of earlier months, such as March's peak of 294 mm (11.6 in). The trend showcases the transition into drier conditions, as rainfall diminishes from the swing of late summer, paving the way for October's resurgence of wet weather. While September still sees rain, the reduced amount highlights a shift towards drier spells, creating a brief respite before the heavier rains return in late autumn.
September in La Union, Ecuador, marks a subtle transition in humidity as it settles at 62%, providing a brief respite from the much higher levels seen in the preceding months. After experiencing the peak humidity of 92% in May and consistent high levels throughout the wetter season, September's conditions reflect the gradual easing of moisture in the air. This month stands out compared to the preceding summer months, where humidity levels were significantly lower, reaching just 57% in August. As October approaches, humidity begins to rise again, climbing to 77%, signaling the return of moisture as the region gears up for the wet season ahead. This fluctuation highlights a distinct rhythm in La Union's climate, with September serving as a bridge between the humid summer and the impending autumn rains.
In September, La Union, Ecuador, experiences a notably high UV Index of 18, placing it in the extreme exposure category with a burn time of just 10 minutes. This month reflects a continuation of the intense UV levels seen from January to May, where values climbed as high as 19. After a slight dip in the previous months of June and July, which recorded UV Indexes of 14, the resurgence to 18 in September underscores the region’s consistent susceptibility to high UV radiation. Residents and visitors alike should remain vigilant about sun safety during these periods of elevated UV exposure. For more insights, check out the La Union UV Index.
UV Risk Categories
September shines brightly in La Union, Ecuador, as the region basks in 320 hours of golden sunshine. This month, just shy of August’s peak, continues a seasonal trend of increasing daylight that begins in the earlier months. From 219 hours in January, sunlight steadily climbs, peaking in the summer when July enjoys 287 hours. The warm glow of September not only reflects the beauty of the landscape but also signals the transition towards a slightly cooler October, which still boasts a robust 293 hours of daylight. This consistent abundance of sunshine makes September a truly delightful time to experience the vibrant culture and natural wonders of La Union.
September marks a notable shift in La Union, Ecuador, as the likelihood of sunny weather reaches 26%, the highest of the year. This increase follows the relatively moderate sun chances seen in the preceding months; with July and August both offering around 19%. The sunny trend in September opens the door to vibrant outdoor activities and breathtaking landscapes, making it an enticing time for visitors. As autumn approaches, the sun begins to show its true colors, inviting both locals and tourists alike to bask in the warmth before the cloud cover returns. With both October and the later months seeing a decrease, seizing the sunny days of September becomes all the more appealing.
In La Union, Ecuador, September shines with a delightful 12 hours of daylight, continuing the trend established earlier in the year. This consistent daylight duration reflects the region's unique equatorial positioning, where the length of day remains remarkably stable throughout most of the year. Following a subtle drop to 11 hours in the months of May, June, and July, daylight returns to its optimal length in August and persists through September, October, and November, showcasing the area's beautiful, predictable rhythm of light. As the year transitions, the unwavering 12-hour daylight serves as a reminder of the enchanting balance between day and night that characterizes life near the equator.
As September rolls into La Union, Ecuador, the coastal breezes pick up slightly, boasting an average wind speed of 2.0 m/s (5 mph). This marks a continuation of the summer pattern, where winds gently increase from July's peak of 2.1 m/s, offering a delightful respite from the warmth of the sun. The steady winds during these late summer months create ideal conditions for various outdoor activities, complementing the serene beauty of the region. Following September, a gradual decline in wind speed is observed as the year transitions into the cooler months, showcasing a captivating rhythm between the seasons that locals have come to cherish.
Weather in La Union varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Union, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 18°C (64°F), with an average temperature of 10°C (50°F). The month sees about 88 mm (3.5 in) of precipitation over 16 days, with humidity levels around 62%. In contrast, January offers slightly warmer temperatures, with a minimum of 5°C (41°F) and a maximum of 20°C (68°F), accompanied by an average of 12°C (53°F). However, January is much wetter, receiving 211 mm (8.3 in) of rainfall over 25 days, and higher humidity at 81%. For a more detailed look at January's climate, you can visit La Union weather in January.
When comparing the weather in September and February, we see some notable differences. September experiences a milder temperature range, with minimums around 3°C (38°F) and maximums peaking at 18°C (64°F), while February is slightly warmer, with minimums at 4°C (39°F) and maximums reaching 19°C (67°F). However, February sees significantly higher precipitation, totaling 240 mm (9.4 in) over 28 days compared to September’s 88 mm (3.5 in) over just 16 days, resulting in a much more humid atmosphere in February with humidity levels at 79% compared to September’s 62%. For a detailed look at February's weather, you can check La Union weather in February.
In comparing the weather of September and March, September tends to be slightly cooler with an average temperature of 10°C (50°F) and maximums reaching up to 18°C (64°F). The month experiences about 88 mm (3.5 in) of precipitation over 16 days, contributing to a relatively moderate humidity level of 62%. In contrast, March offers a milder climate with a higher average temperature of 12°C (54°F) and maximum temperatures peaking at 20°C (68°F). However, it sees significantly more rainfall, with 294 mm (11.6 in) over 30 days and a humidity level of 85%. For a more detailed look at the weather during this month, you can visit La Union weather in March.
September and April showcase distinct differences in weather patterns. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 18°C (64°F), averaging around 10°C (50°F). The month experiences about 88 mm (3.5 in) of precipitation spread over 16 days, with humidity levels at 62%. In contrast, April boasts milder temperatures, with a minimum of 6°C (42°F) and a maximum of 20°C (68°F), averaging 12°C (53°F). However, it is also significantly wetter, receiving 242 mm (9.5 in) of rain over 29 days, resulting in higher humidity levels of 88%. For more details on weather conditions specific to April, you can check La Union weather in April.
In comparing the weather between September and May, September generally shows milder temperatures, with a minimum of 3°C (38°F) and a maximum of 18°C (64°F), averaging around 10°C (50°F). In contrast, May temperatures are slightly warmer, featuring a minimum of 5°C (41°F) and a maximum of 19°C (66°F), with an average of 11°C (53°F). However, May is also characterized by significantly higher precipitation, totaling 215 mm (8.5 in) over 28 days, compared to September's 88 mm (3.5 in) across 16 days. Additionally, May's humidity at 92% makes it feel even wetter compared to September's 62%. For more detailed weather insights for May, you can visit La Union weather in May.
In comparing the weather of September and June, both months feature similar temperature ranges, with minimum temperatures around 3°C (38°F), average highs reaching 18°C (64°F), and average temperatures hovering close to 10°C (50°F). However, June experiences significantly higher precipitation, with 165 mm (6.5 in) spread across 24 days, compared to September’s 88 mm (3.5 in) over 16 days. Additionally, June has a higher humidity level at 87%, while September sits at 62%. For a more detailed look at June weather conditions, you can visit La Union weather in June.
When comparing the weather in September and July, both months show a similar maximum temperature of 18°C (64°F), but September typically experiences slightly milder conditions with an average temperature of 10°C (50°F) compared to July's average of 9°C (49°F). Additionally, September has a higher minimum temperature of 3°C (38°F), while July's minimum dips to 1°C (34°F). Precipitation is significantly more prevalent in July, with 157 mm (6.2 in) over 23 days, compared to September's 88 mm (3.5 in) over 16 days, indicating that July tends to be the wetter month. The humidity levels are also marginally higher in July at 67%, while September averages 62%. For more detailed information on July weather, you can visit La Union weather in July.
In comparing the weather of September and August, September tends to be slightly warmer with an average temperature of 10°C (50°F) compared to August's 9°C (49°F). Both months share the same maximum temperature of 18°C (64°F), but September has a marginally higher minimum temperature of 3°C (38°F) versus August's 2°C (36°F). Precipitation levels are slightly lower in September, with 88 mm (3.5 in) over 16 days, compared to August's 109 mm (4.3 in) over 20 days. Interestingly, September also experiences a higher humidity at 62%, compared to August's 57%. For more detailed information, you can visit La Union weather in August.
September and October present a gradual transition in weather conditions. In September, temperatures range from a chilly minimum of 3°C (38°F) to a comfortable maximum of 18°C (64°F), with average rainfall of 88 mm (3.5 in) spread over 16 rainy days and a humidity level of 62%. As October arrives, the temperatures slightly increase, with a minimum of 4°C (40°F) and a maximum of 19°C (66°F), but precipitation experiences a significant rise to 181 mm (7.1 in) over 28 days, contributing to increased humidity at 77%. This shift indicates a wetter and more humid October compared to the milder and drier September. For more detailed weather insights, you can check La Union weather in October.
September and November present distinct variations in weather, despite their similar minimum temperatures of around 3°C (38°F). In September, the average temperature is slightly cooler at 10°C (50°F), peaking at 18°C (64°F), with a total precipitation of 88 mm (3.5 in) over 16 days, resulting in a humidity level of 62%. In contrast, November brings a milder average temperature of 12°C (53°F) and a higher maximum of 20°C (68°F), but it also sees a significant increase in rainfall, totaling 255 mm (10.0 in) across 29 days and elevating humidity to 82%. For more details on November weather patterns, you can check La Union weather in November.
In September, the weather is generally milder with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 18°C (64°F), averaging around 10°C (50°F). This month sees moderately low precipitation of 88 mm (3.5 in) over 16 days, along with a humidity level of 62%. In contrast, December experiences slightly warmer temperatures, with a minimum of 5°C (42°F) and a maximum of 19°C (66°F), averaging 12°C (54°F). However, December is much wetter, with a significant increase in precipitation totaling 275 mm (10.8 in) across 30 days and higher humidity levels at 86%. For more detailed information regarding the weather in December, you can visit La Union weather in December.
As September arrives in La Union, the weather takes a notable turn, bringing cooler temperatures with an average hovering around 10°C (50°F). This month stands out with a higher precipitation level, recording about 88 mm over 16 days, resulting in a distinctly wet atmosphere compared to the drier months preceding it. The humidity also increases, reaching around 62%, which can make the cool days feel a bit more brisk. Overall, September presents a refreshing contrast, making it a unique time to experience La Union's character. For a deeper dive into the trends and nuances of the region's climate, visit La Union Climate.