Last updated: August 21, 2025
In September, Muang Phonsavan, Laos experiences a warm and humid climate characterized by maximum temperatures reaching 30°C (87°F) and an average of 23°C (73°F). With minimum temperatures dipping to 13°C (56°F), the weather is pleasantly mild for outdoor activities. However, this month is also marked by considerable rainfall, with an average precipitation amount of 128 mm (5.0 in) over approximately 21 rainy days, contributing to a high humidity level of 85%. Visitors should prepare for both warmth and rain, making it a unique time to explore this captivating region.
In September, Muang Phonsavan experiences a mild transition as the temperatures begin to shift towards the cooler months. With minimums dropping to 13°C (56°F) and maximums reaching 30°C (87°F), the average temperature settles comfortably at 23°C (73°F). This month retains a tropic feel while hinting at the approaching autumn, contrasting sharply with the warmer, more humid conditions of summer. As the landscape transitions, visitors can enjoy a pleasant climate that’s ideal for exploring the area's rich history and natural beauty, making September a delightful time to experience all that Muang Phonsavan has to offer.
In September, Muang Phonsavan experiences a substantial precipitation drop compared to the previous months, with 128 mm (5.0 in) of rain over 21 days. This marks a shift from the heavy downpours typical of the peak monsoon months, August and July, where rainfall exceeded 300 mm (11.9 in) and 266 mm (10.5 in)**, respectively. As the rainy season begins to wane, September offers a balance of wet weather, allowing for necessary moisture while still providing clearer breaks in the rainfall. This trend hints at the gradual transition into the drier months ahead, with October showing further decreased precipitation at 115 mm (4.5 in) over 16 days. Thus, September serves as a pivotal point in the seasonal cycle, bridging the lushness of the monsoon with the impending tranquility of the dry season.
In Muang Phonsavan, Laos, September marks a transition as humidity begins to recede from the peak levels of the summer months. After experiencing a significant rise from 54% in March to a soaring 93% in August, September’s humidity settles at 85%. This drop provides a slight reprieve, yet the air remains noticeably moist, indicative of the region's tropical climate. October follows suit with a further decrease to 78%, suggesting that while the oppressive humidity of midsummer starts to wane, the lingering effects of the wet season still envelop the landscape, enhancing the lush greenery characteristic of this vibrant region.
In September, Muang Phonsavan experiences a notably high UV Index of 15, placing it firmly in the extreme exposure category. This marks the peak of the year’s intensity, mirroring the conditions seen in the preceding months of July and August. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to adopt sun protection measures during this time. This trend of consistently high UV levels from February through September underscores the importance of vigilance against sun exposure, as even the cooler months still present significant UV risk. For those looking to understand the nuances of sun safety in this captivating region, detailed insights can be found at Muang Phonsavan UV Index.
UV Risk Categories
September in Muang Phonsavan, Laos, offers a delightful retreat with 278 hours of sunshine, positioning it as one of the sunniest months of the year. Following the vibrant sunshine of August, which totaled 241 hours, September enjoys a significant boost in daylight, suggesting a gradual transition into the golden October. The month’s ample sunshine is not only refreshing but also part of a trend throughout the year, where the sunny allure peaks in March and May, both boasting 305 hours. As autumn approaches, September's weather allows residents and visitors alike to bask in pleasant warmth while the lush landscapes celebrate the tail-end of the rainy season.
In Muang Phonsavan, Laos, the likelihood of sunny weather in September is relatively low, with only a 13% chance of sunshine. This marks a significant drop from the more promising months earlier in the year, such as January and December, when the chance of sun exceeds 60%. As the rainy season peaks during the summer months, the chances of clear skies diminish sharply, reaching a mere 9% in August. Following this trend, September continues to grapple with the remnants of monsoon activity, making sunny days a rarity. However, as the month progresses toward the cooler months, there tends to be a gradual increase in the likelihood of sunshine, hinting at the more favorable conditions that return with October and beyond.
As summer gives way to autumn in Muang Phonsavan, Laos, September brings 12 hours of daylight, maintaining the steady rhythm established in the previous months. Following a peak of 13 hours in May, June, and July, the duration of daylight begins to taper off slightly, transitioning back toward the shorter days of the winter months. This gradual decrease highlights a trend where daylight durations increase sharply from January through July and then gently decline until December. With daylight remaining consistent at 12 hours in September and August, residents and visitors alike can enjoy ample sunlight as the landscape shifts into vibrant fall hues, making it an ideal time for exploration and discovery.
As September rolls into Muang Phonsavan, the air carries a gentle whisper, with average wind speeds dropping to 1.4 m/s (3 mph). This slight decrease reflects a month where the soft breezes of preceding summer begin to fade. In contrast to the more consistent winds of June through August, which maintained a moderate pace of around 1.6 to 1.9 m/s, September’s calms create a serene atmosphere, inviting both reflection and exploration. As autumn approaches, the landscape may seem to hold its breath, poised between the vibrancy of summer and the crispness of the upcoming season, reminding visitors that nature’s rhythm is ever-present and true to its course.
Weather in Muang Phonsavan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Muang Phonsavan, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is characterized by warmer temperatures, with a minimum of 13°C (56°F) and an average of 23°C (73°F), peaking at 30°C (87°F). However, it's also a month of significant precipitation, averaging 128 mm (5.0 in) over 21 days, coupled with high humidity at 85%. In contrast, January experiences cooler temperatures, with a minimum of 3°C (37°F) and an average of 16°C (62°F), reaching a maximum of 28°C (84°F). This month sees much less rainfall, only 18 mm (0.7 in) over just 4 days, and a decrease in humidity to 65%. For more details about the weather patterns in January, you can check Muang Phonsavan weather in January.
September and February present quite different weather patterns. September tends to be warmer overall, with an average temperature of 23°C (73°F) and maximum highs reaching 30°C (87°F). However, it is also marked by high humidity at 85% and significant rainfall, with precipitation occurring on 21 days and totaling 128 mm (5.0 in). In contrast, February offers cooler temperatures, with a minimum of 6°C (43°F) and an average of 17°C (64°F). The month is notably drier, with only 23 mm (0.9 in) of rain falling on just 2 days and lower humidity at 63%. For a more detailed look at February weather, check out Muang Phonsavan weather in February.
In September, the weather tends to be warmer and more humid, with average temperatures around 23°C (73°F) and maximums reaching up to 30°C (87°F). This month also sees considerable rainfall, recording about 128 mm (5.0 in) over 21 days, contributing to a high humidity level of 85%. In contrast, March offers milder temperatures, with an average of 20°C (69°F) and highs that can peak at 33°C (91°F). The precipitation is significantly lower at 44 mm (1.7 in) over just 10 days, and the humidity is much more comfortable at 54%. For more detailed weather information during this month, check out Muang Phonsavan weather in March.
When comparing the weather between September and April, notable differences emerge in both temperature and humidity levels. September tends to be warmer, with average highs reaching 30°C (87°F), while April experiences its peak temperature at 33°C (92°F). However, April starts off cooler with a minimum temperature of 7°C (45°F), compared to September's minimum of 13°C (56°F). Both months see a similar amount of precipitation, with September receiving 128 mm (5.0 in) over 21 days and April slightly higher at 130 mm (5.1 in) over 19 days. Additionally, the humidity in September is significantly higher at 85%, compared to a much drier 47% in April. For more detailed information, you can explore Muang Phonsavan weather in April.
September and May offer distinct weather patterns, making each month unique in its own right. In September, temperatures range from a minimum of 13°C to a maximum of 30°C, with an average of 23°C. The month experiences considerable rainfall, with 128 mm falling over 21 days and a high humidity level of 85%. In contrast, May sees slightly warmer temperatures, with a minimum of 14°C and a maximum reaching 33°C, while maintaining a similar average of 23°C. Rainfall in May is a bit higher at 136 mm over 24 days, but the humidity is notably lower at 67%. For more detailed insights specific to May, you can refer to Muang Phonsavan weather in May.
In comparing the weather between September and June, September tends to have milder temperatures with a minimum of 13°C (56°F) and an average of 23°C (73°F), while June is warmer, featuring a minimum of 19°C (67°F) and an average of 24°C (76°F). However, June reaches higher maximum temperatures, peaking at 36°C (96°F), compared to September’s maximum of 30°C (87°F). Both months experience considerable rainfall, but June sees higher precipitation at 196 mm (7.7 in) over 26 days, compared to September's 128 mm (5.0 in) over 21 days. While September has slightly higher humidity at 85%, June remains fairly humid at 81%. For a detailed look at June weather, you can visit Muang Phonsavan weather in June.
In comparing the weather of September and July, we notice distinct differences in temperature and precipitation patterns. September sees a minimum temperature of 13°C (56°F), which is noticeably cooler than July’s minimum of 18°C (65°F). Despite both months having a similar average temperature of around 23°C (73°F), July reaches a slightly higher maximum of 31°C (88°F) compared to September's 30°C (87°F).
Precipitation levels also differ significantly; September experiences 128 mm (5.0 in) of rain over 21 days, while July is much wetter with 266 mm (10.5 in) over 28 days. The humidity remains high in both months, but July's is slightly higher at 92%, compared to September's 85%. For a detailed look at July weather, you can visit Muang Phonsavan weather in July.
In comparing the weather of September and August, we see some notable differences. September features slightly cooler temperatures, with a minimum of 13°C and a maximum of 30°C, while August boasts a warmer minimum of 18°C and a maximum of 31°C. Both months experience similar average temperatures, around 23°C, but August tends to be wetter, receiving 301 mm of precipitation over 28 days compared to September's 128 mm over 21 days. Additionally, humidity levels are higher in August at 93%, compared to 85% in September. For more detailed information, you can refer to Muang Phonsavan weather in August.
September and October present a transition in weather patterns, with noticeable differences in temperature and precipitation. In September, the temperatures range from a minimum of 13°C (56°F) to a maximum of 30°C (87°F), accompanied by 128 mm (5.0 in) of rainfall over 21 days, creating a humid environment with an average humidity of 85%. Conversely, October showcases slightly cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 31°C (88°F), while experiencing less rainfall at 115 mm (4.5 in) spread over 16 days. The humidity also decreases to an average of 78%, making October feel more comfortable compared to the preceding month. For further details on the weather in this region, you can check Muang Phonsavan weather in October.
September and November present contrasting weather patterns. In September, temperatures typically range from a minimum of 13°C (56°F) to a maximum of 30°C (87°F), with an average of 23°C (73°F). This month experiences significant rainfall, totaling 128 mm (5.0 in) over 21 days, resulting in a high humidity level of 85%. In contrast, November sees cooler temperatures, averaging 19°C (66°F) with a minimum of 8°C (47°F) and a maximum of 30°C (86°F). Rainfall diminishes dramatically to just 18 mm (0.7 in) spread over only 4 days, leading to a more comfortable humidity of 73%. For more details, you can check Muang Phonsavan weather in November.
September and December present contrasting weather patterns. In September, temperatures range from a minimum of 13°C (56°F) to a maximum of 30°C (87°F), with an average of 23°C (73°F). This month also sees significant rainfall, totaling 128 mm (5.0 in) over 21 days, accompanied by high humidity levels of 85%. In stark contrast, December offers cooler conditions, with temperatures dropping to a minimum of 0°C (33°F) and averaging 16°C (60°F), peaking at 28°C (82°F). December experiences much less precipitation, totaling only 14 mm (0.6 in) over just one day, and the humidity decreases to 69%. For a more detailed look at December weather, check out Muang Phonsavan weather in December.
As September unfolds in Muang Phonsavan, the weather showcases a distinct shift compared to other months, with milder temperatures averaging around 23°C and a considerable increase in humidity at 85%. Rainfall becomes more prevalent, with an average of 128 mm over 21 days, transforming the landscape into a lush paradise while cooling the air. This month serves as a transitional period, blending warm days with frequent showers that are both refreshing and vital for the region’s ecosystems. For a deeper dive into the weather patterns throughout the year, check out the full details at Muang Phonsavan Climate.