Last updated: August 21, 2025
In September, Luang Prabang, Laos experiences a warm tropical climate, with maximum temperatures reaching up to 34°C (93°F) and an average temperature around 26°C (78°F). As the month unfolds, the weather becomes increasingly humid, with humidity levels averaging 85%. Rainfall is significant, with 171 mm (6.8 in) of precipitation spread over about 22 days, making it one of the wetter months. Visitors should prepare for a blend of warmth and moisture, ideal for experiencing the lush landscapes and vibrant culture of this UNESCO World Heritage city.
September in Luang Prabang, Laos, marks a transition as temperatures begin to dip slightly from the summer peak. With a minimum of 19°C (66°F) and a comfortable average of 26°C (78°F), the city enjoys a pleasant warmth that invites exploration. Despite the lingering heat, the maximum temperature of 34°C (93°F) signals that summer's grip is loosening, making way for the cooler months ahead. This month stands out for its balance, showcasing a drop in the extremes seen in August, which often reached the upper 30s. As the rainy season unfolds, visitors can revel in a more moderate climate, perfect for discovering the rich cultural tapestry of this UNESCO World Heritage site.
In September, Luang Prabang experiences a notable drop in precipitation compared to the record highs of August, with 171 mm (6.8 in) of rain over 22 days. This month typically marks a transition as the monsoon season begins to wane, yet it still holds onto significant moisture. Just weeks after August’s peak of 337 mm, September’s rainfall can feel quite refreshing, contributing to the lushness of the surrounding landscapes. While the number of wet days remains high, the overall rainfall amount indicates a gradual easing of the monsoon intensity, preparing the region for the drier months ahead. This trend invites both the vibrant colors of nature and a slight respite from the relentless downpours, making it a unique time to experience Luang Prabang's rich environmental beauty.
In September, Luang Prabang experiences a notable drop from the peak humidity levels of the preceding months, settling at a robust 85%. This marks a slight decrease from the oppressive 92% humidity of August, yet still reflects the high humidity typical of the rainy season. The trend throughout the year showcases a gradual increase in humidity starting from the drier months of January and February, with levels reaching their highest in July and August. As the region transitions into October, humidity begins to taper off, offering a reprieve from the tropical stickiness. This blend of high humidity and lush landscapes enhances the vibrant allure of Luang Prabang, making September a uniquely atmospheric month to visit.
In September, Luang Prabang experiences a UV Index of 14, categorizing it as extreme and requiring just 10 minutes of sun exposure before burning occurs. This month continues the trend of high UV levels seen since the start of the year, peaking in the summer months of July and August with an index of 15. Although slightly lower than those peak levels, September remains a season where sun safety is crucial. With this high UV intensity, it's essential for visitors and locals alike to take protective measures. For more detailed information on the UV levels throughout the year, check the complete guide at Luang Prabang UV Index.
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September in Luang Prabang, Laos, offers a delightful blend of warm weather and impressive sunshine, boasting 280 hours of bright daylight. As the green hills start to embrace the onset of autumn, the sunlight is still abundant, tracing a gentle decline from the summer peak of 318 hours in May. This month continues a trend of consistent sunshine following the rainy season, where sunshine hours dip slightly to the 270s in July and August. As October approaches, the number of daylight hours picks up again, setting a warm stage for the vibrant culture and stunning landscapes that define this enchanting town. Whether soaking up the sun or exploring the rich heritage, September provides a perfect backdrop for unforgettable experiences in Luang Prabang.
As September rolls into Luang Prabang, the chances of sunny weather remain modest at 22%, a slight increase from the rainiest months of June and August, which see only 12% and 10% sunny days respectively. This transition hints at the tail end of the monsoon, but the sunshine in September is still quite elusive compared to the earlier months of the year. Notably, the likelihood of bright skies significantly picks up again in October, reaching 25%, and climbs even higher as the year approaches its close. Travelers should be prepared for occasional rain, but with a bit of luck, they might still enjoy some sun-drenched moments amid the breathtaking landscapes that characterise this enchanting region.
As September unfolds in Luang Prabang, residents and visitors alike can enjoy approximately 12 hours of daylight each day. This month marks a subtle transition from the long, sun-drenched days of summer, peaking in May through July with 13 hours of daylight, back toward the shorter days of fall. As the year progresses, daylight durations begin to gradually decline, with October signaling a further drop to 11 hours. This rhythm of daylight is particularly captivating, as it mirrors the shifting seasons, inviting locals to savor the lingering warmth while preparing for the cooler months ahead. The balance of light and shadow creates a perfect backdrop for the picturesque landscapes and vibrant culture that define this enchanting destination.
In September, the gentle breath of the Laotian wind slows to an average speed of just 1.0 m/s (2 mph), making it one of the calmest months in Luang Prabang. This dip in wind speed marks a notable contrast to the slight increases observed in the preceding months, where the winds picked up to 4 mph in both March and June. The overall pattern reveals a fascinating fluctuation, with the winds throughout the year typically hovering around the 3 mph mark. As the monsoon season wanes, September's tranquil winds offer a serene backdrop for exploring the stunning landscapes and rich cultural heritage of this enchanting city.
Weather in Luang Prabang varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Luang Prabang, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase a stark contrast in weather conditions. September features warmer temperatures, with a minimum of 19°C (66°F) and an average of 26°C (78°F), peaking at 34°C (93°F). This month also experiences significant rainfall, with 171 mm (6.8 in) over 22 days, resulting in a high humidity of 85%. In contrast, January is much cooler, with temperatures ranging from a low of 7°C (46°F) to a comfortable average of 19°C (66°F) and a maximum of 31°C (89°F). Additionally, January receives significantly less precipitation at 26 mm (1.0 in) across only 4 days, leading to a lower humidity level of 57%. For more details on January weather, visit Luang Prabang weather in January.
In comparing the weather between September and February, September is notably warmer and much more humid, featuring average temperatures of 26°C (78°F) and a maximum of 34°C (93°F). This month also experiences significantly higher precipitation, with 171 mm (6.8 in) spread over 22 days, contributing to an 85% humidity level. In contrast, February offers a milder climate with lower average temperatures of 20°C (69°F), a maximum of 33°C (91°F), and a stark reduction in rainfall, recording only 16 mm (0.6 in) over just 1 day, resulting in a comfortable 53% humidity. For more specifics on February weather, you can check out Luang Prabang weather in February.
September and March present noticeable contrasts in weather patterns. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 34°C (93°F), with an average of 26°C (78°F). This month experiences significant precipitation, totaling 171 mm (6.8 in) over 22 days, and high humidity levels at 85%. In contrast, March boasts slightly cooler temperatures, with a minimum of 14°C (57°F) and a maximum of 36°C (98°F), averaging 24°C (75°F). Notably, March is much drier, receiving only 19 mm (0.8 in) of rain over just 4 days, and has a significantly lower humidity level of 45%. For a deeper look into the weather specifics, visit Luang Prabang weather in March.
September and April exhibit distinct differences in weather patterns. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 34°C (93°F), with an average of 26°C (78°F). The month is characterized by high humidity at 85% and significant rainfall, averaging 171 mm (6.8 in) over 22 days. In contrast, April features milder mornings with a minimum temperature of 13°C (56°F) but can soar to a maximum of 37°C (100°F) during the day, with an overall average of 25°C (77°F). April also experiences less precipitation, with 103 mm (4.1 in) falling across only 12 days and significantly lower humidity at 39%. For a more detailed look at the weather characteristics in April, check out Luang Prabang weather in April.
When comparing the weather in September and May, several key differences emerge. September tends to be slightly warmer overall, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 34°C (93°F), while May offers a minimum of 18°C (65°F) and can peak at an impressive 39°C (102°F). Precipitation is significantly higher in September, totaling 171 mm (6.8 in) over 22 days, compared to May's 82 mm (3.2 in) over just 13 days. Humidity levels also differ, with September being notably more humid at 85%, whereas May has a lower humidity at 66%. For a more detailed look at the conditions during this time, check out Luang Prabang weather in May.
In comparing the weather of September and June, we see some notable differences. September generally experiences slightly cooler temperatures, with an average of 26°C (78°F) compared to June’s average of 27°C (81°F). However, June has a higher maximum temperature, reaching up to 38°C (101°F), while September peaks at 34°C (93°F). Both months have significant precipitation, with September receiving more rainfall at 171 mm (6.8 in) over 22 days, whereas June totals 149 mm (5.9 in) across 20 days. Humidity also plays a role, being higher in September at 85% compared to June's 79%. For more detailed information on June's weather specifically, you can visit Luang Prabang weather in June.
In comparing the weather of September and July, both months experience warm temperatures, but July tends to be slightly hotter, with a maximum average of 36°C (97°F) compared to September’s 34°C (93°F). While both months have similar average temperatures of around 26°C (80°F), September has a lower minimum temperature of 19°C (66°F) compared to July’s 22°C (72°F). Additionally, July sees more precipitation, totaling 240 mm (9.4 in) over 23 days, whereas September receives 171 mm (6.8 in) of rain over 22 days. Humidity remains high in both months, peaking at 90% in July and 85% in September. For more details, you can refer to the information about Luang Prabang weather in July.
In comparing the weather conditions of September and August, September exhibits slightly milder temperatures, with minimums at 19°C (66°F) compared to August's 21°C (71°F). Both months share an average temperature of around 26°C (79°F) and reach maximums of 34°C (93°F). However, September experiences significantly less rainfall, with 171 mm (6.8 in) over 22 days, while August sees a much wetter climate with 337 mm (13.3 in) over 27 days. Humidity levels are also lower in September at 85%, as opposed to August's 92%. For those interested in a detailed overview of August weather in this region, please refer to Luang Prabang weather in August.
In September, the weather in Luang Prabang is characterized by warm temperatures, with a minimum of 19°C (66°F) and an average of 26°C (78°F), peaking at 34°C (93°F). Rainfall is considerable, with 171 mm (6.8 in) of precipitation spread over 22 days, and the humidity remains high at 85%. In contrast, October brings slightly cooler conditions, with temperatures ranging from a minimum of 14°C (58°F) to an average of 24°C (76°F), while still reaching a maximum of 34°C (93°F). The month sees less precipitation, totaling 103 mm (4.0 in) over 15 days, and humidity levels drop to 72%. For more detailed weather information, check out Luang Prabang weather in October.
In September, the weather is quite warm with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 34°C (93°F), averaging around 26°C (78°F). This month also experiences significant rainfall, with 171 mm (6.8 in) of precipitation spread over 22 days, contributing to a high humidity level of 85%. In contrast, November brings cooler temperatures, with a minimum of 13°C (56°F) and a maximum of 31°C (89°F), averaging at 22°C (72°F). The month is much drier, seeing only 20 mm (0.8 in) of rain over just 4 days, and the humidity drops to a more comfortable 64%. For more detailed insights about the weather in November, you can check Luang Prabang weather in November.
September and December in Luang Prabang present a striking contrast in weather patterns. In September, the temperatures range from a minimum of 19°C (66°F) to a maximum of 34°C (93°F), with an average of 26°C (78°F). This month is characterized by high humidity at 85% and significant rainfall, averaging 171 mm (6.8 in) across approximately 22 days. In sharp contrast, December features much cooler weather, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 30°C (87°F) and an average of 18°C (66°F). Precipitation drops dramatically to just 15 mm (0.6 in) over 2 days, and humidity decreases to 60%. For a more detailed overview of December weather, you can visit Luang Prabang weather in December.
September in Luang Prabang offers a unique blend of warm temperatures, with days averaging around 26°C and occasional peaks up to 34°C. However, it's also marked by significant rainfall, as the region experiences its wettest month with an average of 171 mm spread over 22 days. This humidity, hovering around 85%, contributes to a lush, vibrant landscape, setting September apart from the dryer months. Travelers should prepare for a mix of sunshine and showers, making it a perfect time to experience the city's natural beauty in full bloom. For more detailed insights into the weather patterns throughout the year, visit Luang Prabang Climate.