Last updated: August 21, 2025
In September, La Union, Colombia experiences a tropical climate characterized by warm temperatures and high humidity. The maximum daily temperature reaches around 31°C (88°F), while the average settles at a comfortable 22°C (72°F). Nights bring cooler breezes, with temperatures dipping to a minimum of 15°C (60°F). This month is particularly wet, with total precipitation accumulating to 395 mm (15.6 in) over approximately 28 rainy days, contributing to a lush environment. With humidity levels averaging 80%, visitors can expect a vibrant, green landscape, perfect for experiencing the rich biodiversity that La Union has to offer.
In September, La Union, Colombia, experiences a pleasant climate with temperatures that range from a minimum of 15°C (60°F) to a comfortable maximum of 31°C (88°F). The average temperature remains stable at 22°C (72°F), consistent with trends observed throughout the year. Notably, this month marks a slight increase in the maximum temperature compared to earlier months, reflecting a gradual warming trend as the region transitions into the latter part of the year. With its perfect blend of warm days and cooler nights, September is an inviting time to explore the natural beauty and rich culture that La Union has to offer.
In September, La Union, Colombia, experiences a significant shift in precipitation, with 395 mm (15.6 in) of rainfall across 28 days. This marks a slight decrease from the heavy downpours of previous months, such as May, which recorded the highest rainfall at 687 mm (27.1 in). However, September still maintains a robust level of moisture, continuing the trend of the wet season. Following a similarly wet August, the rainfall pattern reveals a gradual tapering that hints at the approaching dry months, yet remnant humidity lingers, sustaining the lush vegetation characteristic of this vibrant region. As the year progresses, the interplay of rainfall and dry spells shapes the local climate and environment, influencing everything from agriculture to daily life in La Union.
In September, the humidity in La Union, Colombia, settles at a comfortable 80%, reflecting a slight decline from the peak of 87% seen in May and June. This month marks a transitional point as humidity levels begin to recede after the wettest part of the year, which usually peaks in the summer months. Notably, September's humidity aligns with August's, suggesting a consistent trend of warm, moisture-laden air that persists through late summer. As the region heads into October, humidity rises again to 85%, hinting at a return to the muggier conditions characteristic of the rainy season. Overall, humidity in La Union demonstrates a rhythmic pattern, fluctuating but remaining relatively high throughout the year, creating a lush, vibrant landscape.
In September, La Union, Colombia, consistently experiences an extreme UV Index of 14, similar to the preceding months of June, July, and August. This persistent high level of UV exposure, which allows for a quick burn time of just 10 minutes, highlights the importance of taking protective measures against the sun's rays. Remarkably, the UV Index has been largely stable throughout the year, peaking at 17 in April and gradually tapering off to 13 in November. For those planning to enjoy the outdoors, it's crucial to stay informed about these trends to ensure safety under the sun. Learn more about UV exposure here: La Union UV Index.
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In September, La Union basks in 278 hours of glorious sunshine, continuing the late summer trend of bright days that began in August with an impressive 290 hours. As the year progresses, the sunshine hours gradually decline from the peak of summer, yet September still stands out as a remarkably sunny month, outperforming several earlier months, including January and April. The consistent warmth and plentiful sunlight make it an inviting time for visitors to enjoy the region's stunning landscapes and vibrant culture, as the warm light of early autumn melds beautifully with the lush surroundings. Whether lounging on the beach or exploring local attractions, the September sunshine in La Union offers an ideal backdrop for memorable experiences.
In La Union, Colombia, the likelihood of enjoying sunny weather in September stands at 13%, which is a notable improvement compared to the often cloudier months of June and August, where chances dip as low as 4%. As summer transitions into fall, September offers a slightly brighter outlook, though it still remains on the lower end of the spectrum when contrasted with some earlier months like January, which boasts a 17% chance of sunshine. This trend indicates that while September provides a glimmer of hope for sunny days, travelers should still be prepared for typical tropical weather variability throughout the month.
In La Union, Colombia, September continues the trend of consistently 12 hours of daylight, a pattern established from March through October. This stability in daylight duration allows for ample time to explore the region’s vibrant landscapes and rich culture. As the year progresses, daylight gradually decreases, with 11 hours of daylight returning in November and December, marking a gentle transition into the shorter days of the late year. Nonetheless, September stands out with its extended daylight, inviting both locals and visitors to relish in the beauty of the outdoors under the sunlit sky.
In September, La Union embraces a gentle breeze, with average wind speeds peaking at 1.1 m/s (2 mph), reflecting a subtle yet noticeable increase compared to the summer months. This consistent airflow, which has hovered around the 1.0 m/s mark through most of the year, marks September as a transitional period, hinting at the shift as the year progresses. As the winds whisper softly through the landscape, they bring a refreshing touch to the warm Colombian atmosphere and invite locals and visitors alike to revel in the beauty of late summer's embrace. With the winds beginning to calm slightly in the following months, September stands out as a serene moment, setting the tone for the changing seasons ahead.
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.
September and January offer similar average temperatures, both hovering around 22°C (72°F), but their overall weather patterns differ significantly. September experiences higher maximum temperatures of 31°C (88°F) and greater humidity at 80%, alongside substantial rainfall of 395 mm (15.6 in) over 28 days, making it one of the wetter months. In contrast, January is slightly cooler with maximum temperatures reaching 30°C (87°F) and enjoys less precipitation of 267 mm (10.5 in) over 24 days, resulting in a drier atmosphere with humidity at 78%. For more detailed information, you can check La Union weather in January.
In September, the weather is characterized by a slightly wider temperature range, with a minimum of 15°C (60°F) and a maximum of 31°C (88°F). This month receives significant rainfall, totaling 395 mm (15.6 in) over 28 days, coupled with high humidity at 80%. In contrast, February features a similar average temperature of 22°C (72°F), but with a slightly lower minimum of 14°C (57°F) and a maximum of 30°C (86°F). Precipitation in February is also reduced, at 323 mm (12.7 in) over 24 days and with a humidity level of 77%. For more detailed information, you can check La Union weather in February.
When comparing the weather in September and March, we see that both months exhibit a similar average temperature of around 22°C (72°F). September experiences a slightly higher maximum temperature of 31°C (88°F) compared to March's 30°C (86°F). However, March tends to have a marginally wetter climate, with precipitation measuring 452 mm (17.8 in) over 29 days, as opposed to September's 395 mm (15.6 in) spread across 28 days. Both months maintain a high humidity level of 80%, creating a consistently tropical environment throughout. For more detailed insights into March weather, you can check out La Union weather in March.
When comparing the weather in September and April, both months feature similar average temperatures, with minimums around 15°C (60°F) and averages of 22°C (72°F). However, September can reach a maximum temperature of 31°C (88°F), slightly higher than April's peak of 30°C (86°F). Precipitation levels are notably higher in April, totaling 569 mm (22.4 in) over 29 days, compared to September's 395 mm (15.6 in) over 28 days. Additionally, April has a slightly higher humidity level at 83%, compared to 80% in September. For a detailed look at April's weather, check out La Union weather in April.
When comparing September and May weather, we notice some interesting contrasts. Both months have a similar average temperature of 22°C (72°F), but September's temperatures range from a minimum of 15°C (60°F) to a maximum of 31°C (88°F), while May sees slightly warmer temperatures with a minimum of 16°C (62°F) and a maximum of 29°C (85°F).
However, May is characterized by significantly higher precipitation, totaling 687 mm (27.1 inches) over 31 days compared to September's 395 mm (15.6 inches) across 28 days. The humidity levels are also higher in May at 87%, compared to 80% in September. For a closer look at the weather specifics in May, you can refer to La Union weather in May.
In comparing the weather of September and June, we see some notable similarities and differences. Both months share an average temperature of 22°C (72°F), but September experiences slightly higher maximum temperatures, reaching up to 31°C (88°F), compared to June's peak of 29°C (85°F). Precipitation levels are higher in June, with a total of 526 mm (20.7 in) over 30 days, compared to September's 395 mm (15.6 in) across 28 days. Additionally, humidity in June is a bit more intense at 87%, while September averages at 80%. For more detailed weather insights, you can check La Union weather in June.
In comparing the weather conditions of September and July, both months exhibit warm average temperatures around 22°C (72°F), but September tends to have slightly higher maximum temperatures reaching up to 31°C (88°F), compared to July's peak of 29°C (85°F). However, July experiences more precipitation, with a total of 496 mm (19.5 in) over 29 days, while September sees lower rainfall at 395 mm (15.6 in) spread across 28 days. Additionally, humidity in July is marginally higher at 85% compared to 80% in September, contributing to a more humid atmosphere during the earlier month. For a more detailed look at July's weather, you can refer to La Union weather in July.
In comparing the weather conditions of September and August, we observe that both months share similar temperature ranges, with September experiencing slight variations: a maximum of 31°C (88°F) compared to August's 30°C (86°F), while the minimum and average temperatures remain unchanged at 15°C (60°F) and 22°C (72°F) respectively. Precipitation levels are also quite similar, with September receiving 395 mm (15.6 in) over 28 days and August slightly higher at 400 mm (15.7 in) over 29 days. Humidity remains constant at 80% for both months, contributing to the overall muggy climate. For those interested in August specifics, you can find more details in this resource: La Union weather in August.
In September, the weather typically features temperatures ranging from a minimum of 15°C (60°F) to a maximum of 31°C (88°F), with an average of around 22°C (72°F). The month is quite wet, with a total precipitation of 395 mm (15.6 in) spread over 28 days and humidity averaging 80%.
In comparison, October sees a slight increase in minimum temperature to 16°C (62°F), while the average remains around 22°C (71°F) and the maximum dips slightly to 30°C (86°F). However, October is significantly wetter, with precipitation rising to 513 mm (20.2 in) over 30 days and humidity increasing to 85%.
For more specific information on the weather conditions in La Union, refer to this link: La Union weather in October.
In comparing the weather between September and November, both months exhibit similar average temperatures, with September showing a minimum of 15°C and a maximum of 31°C, while November has slightly higher minimums at 17°C and a maximum of 30°C. However, November experiences increased precipitation, totaling 474 mm over 29 days, compared to September's 395 mm over 28 days. Additionally, humidity levels rise in November to 87%, up from September's 80%, making the atmosphere feel a bit more muggy. For more detailed insights on the weather in November, you can visit La Union weather in November.
In September, temperatures range from a minimum of 15°C (60°F) to a maximum of 31°C (88°F), with an average of 22°C (72°F), while December sees slightly warmer temperatures, with a minimum of 16°C (62°F) and a maximum of 29°C (84°F), maintaining the same average of 22°C (72°F). However, September is notably wetter, with a total precipitation of 395 mm (15.6 in) over 28 days compared to December's 349 mm (13.8 in) over 29 days. Humidity levels are also higher in December at 83%, compared to 80% in September. For more detailed weather information, you can visit La Union weather in December.
As September unfolds in La Union, it brings a distinct shift in weather patterns compared to other months. With a peak temperature of 31°C and an average that hovers around 22°C, the warmth is complemented by a noticeable increase in humidity, reaching around 80%. This month is also marked by a significant amount of rainfall, with 395 mm spread across nearly every day, making September one of the wettest times of the year. The lush landscape thrives under these conditions, showcasing nature's resilience. To better understand these weather dynamics and their impact on the region, you can explore more at La Union Climate.