Last updated: August 21, 2025
August in Vientiane, Laos serves up a tropical climate characterized by warm temperatures and substantial rainfall. With maximum highs reaching 37°C (98°F) and an average of 28°C (83°F), the weather can feel quite intense, especially with humidity hovering around 87%. This month also sees significant precipitation, totaling 402 mm (15.8 in), spread over an average of 26 rainy days, making it one of the wetter months of the year. Travelers should prepare for a mix of sunshine and showers, as the lush landscapes thrive under these conditions.
In Vientiane, Laos, August ushers in the tail end of the wet season with warm, humid conditions. Temperatures during this month range from a minimum of 24°C (75°F) to a comfortable average of 28°C (83°F), peaking at 37°C (98°F). This marks a slight decrease in maximum temperatures compared to the scorching highs seen in the earlier months of April and May, where temperatures soared above 40°C (104°F). The consistent warmth of August reflects a trend of rising temperatures as the year progresses, while also hinting at the cooling effect of the rainy season that begins to stabilize at the end of summer. Overall, while days can still feel quite warm, the relative humidity and occasional rain can offer a respite from the heat, creating a unique climate that is characteristic of this vibrant Laotian capital.
August marks a significant peak in precipitation in Vientiane, Laos, with an impressive 402 mm (15.8 in) of rain over 26 days. This influx underscores the region's pronounced wet season, as it follows the relatively dry months of January through April and leads into the still-wet September. The rainfall in August not only contributes to the lush landscape that the city is known for but also highlights a continuous upward trend from May through July, where precipitation escalated dramatically from 204 mm to 331 mm. As the wet season intensifies, August stands out as a crucial period for water replenishment, nurturing the vibrant ecosystem and preparing for a gradual tapering off in the following months.
In August, Vientiane, Laos, experiences its peak humidity level at a staggering 87%, reflecting the region's transition into the heart of the wet season. This is a significant increase from the 39% humidity recorded in March, showcasing the dramatic shift in climate as the year progresses. Following the trend set by June and July, where humidity levels climb to 81% and 83% respectively, August represents the culmination of the annual rise in moisture, leading into the slightly drier conditions of September at 86%. As these humid months unfold, one can sense the palpable stickiness in the air, a hallmark of Vientiane’s tropical climate.
August in Vientiane, Laos, continues the trend of extreme UV exposure, registering a UV Index of 14. This level of intensity means that unprotected skin can burn in just 10 minutes, emphasizing the need for diligent sun safety. The heat and sun intensity peak during this month, mirroring the conditions seen from April through July, where similar extreme levels consistently pose risks. As the rainy season approaches in September, the UV Index remains high, maintaining the extreme alert for sun exposure. For those planning to enjoy the outdoors this August, protective measures are essential. For in-depth information, visit Vientiane UV Index.
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In August, while Vientiane basks in the warmth of the tropical sun, residents experience a modest decline in sunlight hours, totaling 249 hours for the month. This dip marks a continuation of the trend observed since March, when sunshine peaked at 318 hours. Following that height, the days grew shorter through the summer months, as the rainy season set in. Although August offers slightly less sunshine than its preceding months, it is part of a vibrant seasonal rhythm that sees sunshine hours comfortably fluctuate throughout the year, with January beginning with 253 hours and October returning to a more generous 295 hours. While August might not shine the brightest, it still embodies the tropical allure, complimented by the lush greenery that flourishes with the rains.
In August, the likelihood of experiencing sunny weather in Vientiane, Laos is notably low, with only a 14% chance of sunshine. This month continues a decline in clear skies, following an already dismal July at 15% and June at a mere 13%. As the rainy season progresses, the sunny chances dip further, contrasting sharply with the sun-soaked beginning of the year, where January boasts a striking 82% chance of sun. Visitors hoping for bright August days may want to temper their expectations, as the cloud cover and potential rainfall dominate the weather pattern during this time.
In Vientiane, Laos, August marks a slight dip in daylight duration, with the sun gracing the skies for about 12 hours each day. This month continues the trend established earlier in the summer, where daylight peaked at 13 hours in June and July. As the country transitions towards the end of the dry season, the amount of natural light gradually stabilizes, mirroring the consistent 12 hours noted in both March and April. With the daylight hours witnessing only modest fluctuations throughout the year, August offers a perfect balance of warmth and light, making it an ideal time for outdoor activities while preparing for the upcoming seasonal changes.
As August rolls in, Vientiane experiences a gentle breeze with an average wind speed of 1.6 m/s (4 mph), slightly lower than the preceding summer months. This modest shift reflects a gradual decrease in wind velocity compared to the earlier part of the year, where swells of 2.0 m/s in January set the stage for more dynamic air flows. Throughout the hotter months of May and June, wind speeds tumbled to 1.3 m/s before slightly recuperating in July. The overall trend of late summer captures a serene yet refreshing airflow that complements Vientiane's warm, tropical climate, inviting locals and visitors alike to bask in its tranquil embrace. As the city transitions into autumn, this soft wind continues to whisper whispers of change, indicating the approach of cooler days ahead.
Weather in Vientiane varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Vientiane, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present strikingly different weather conditions. In August, temperatures range from a minimum of 24°C (75°F) to a maximum of 37°C (98°F), with an average of 28°C (83°F). This month is also characterized by high humidity at 87% and significant rainfall, totaling 402 mm (15.8 in) over approximately 26 days. In contrast, January offers much cooler weather, with temperatures ranging from a low of 10°C (51°F) to a high of 35°C (95°F) and an average of 24°C (75°F). The winter month witnesses minimal precipitation, just 6 mm (0.2 in), over a single day, and enjoys lower humidity at 52%. For a more detailed look at January weather, visit Vientiane weather in January.
The weather in August contrasts significantly with that of February in terms of temperature, precipitation, and humidity. In August, temperatures range from a minimum of 24°C (75°F) to a maximum of 37°C (98°F), with an average of 28°C (83°F). This month is characterized by heavy rainfall, with a staggering 402 mm (15.8 in) of precipitation spread across 26 days and high humidity at 87%. In contrast, February enjoys a milder climate, with temperatures ranging from a cooler minimum of 13°C (55°F) to a maximum of 38°C (100°F), and an average of 25°C (76°F). The precipitation in February is significantly lower, at just 17 mm (0.7 in) over only one day, and the humidity is notably less at 49%. For more details on February weather, visit Vientiane weather in February.
August and March present contrasting weather patterns. In August, temperatures range from a minimum of 24°C (75°F) to a maximum of 37°C (98°F), with an average of 28°C (83°F). This month is characterized by high humidity at 87% and significant rainfall, totaling 402 mm (15.8 in) over 26 days. In contrast, March experiences a slightly lower minimum temperature of 17°C (63°F) but can reach up to 40°C (104°F), maintaining an average of 28°C (82°F). Notably, March has much less precipitation, with only 41 mm (1.6 in) occurring over just 6 days and a significantly lower humidity level of 39%. For more details, you can check Vientiane weather in March.
August and April present significantly different weather patterns. In August, temperatures range from a minimum of 24°C (75°F) to a maximum of 37°C (98°F), with an average of 28°C (83°F). This month is marked by high humidity at 87% and considerable precipitation, totaling 402 mm (15.8 in) over 26 days. In contrast, April features higher maximum temperatures, peaking at 42°C (107°F), with an average temperature of 29°C (85°F) and a minimum of 17°C (63°F). However, it experiences much less rainfall, with only 70 mm (2.8 in) over 11 days and significantly lower humidity at 40%. For a detailed look at April weather, you can visit Vientiane weather in April.
When comparing the weather in August and May, we see some notable differences. August has a slightly higher average temperature of 28°C (83°F), but with a maximum of 37°C (98°F), it is cooler than May’s peak temperature of 41°C (107°F). Precipitation is significantly higher in August, with 402 mm (15.8 in) falling over 26 days, compared to May’s 204 mm (8.0 in) over 21 days. Additionally, humidity is much greater in August at 87%, while May has a lower humidity level of 69%. For more detailed information about May's climate, you can visit Vientiane weather in May.
Comparing the weather in August and June reveals notable differences in temperature, precipitation, and humidity levels. In August, the temperatures range from a minimum of 24°C (75°F) to a maximum of 37°C (98°F), with an average of 28°C (83°F). This month also experiences significant rainfall, with 402 mm (15.8 in) of precipitation spread over 26 days and a humidity level of 87%. In contrast, June sees slightly higher temperatures, with a minimum of 24°C (75°F) and a maximum of 39°C (102°F), averaging around 29°C (85°F). The precipitation in June is less intense at 309 mm (12.2 in) over 25 days and a lower humidity of 81%. For a more detailed look at June's weather, you can visit Vientiane weather in June.
In comparing the weather of August and July, we see that August experiences slightly cooler temperatures with a minimum of 24°C (75°F) and an average of 28°C (83°F), while July has a minimum of 25°C (76°F) and a slightly higher average of 29°C (84°F). Both months share the same maximum temperature of 37°C (98°F) in August and 37°C (99°F) in July. When it comes to precipitation, August is notably wetter, receiving 402 mm (15.8 in) over 26 days, compared to July's 331 mm (13.0 in) during the same number of days. Additionally, humidity is higher in August at 87%, compared to 83% in July. For more detailed information about July's weather, check Vientiane weather in July.
In comparing the weather between August and September, we observe that both months feature similar average temperatures, with August and September averaging around 28°C (83°F) and maximums reaching up to 37°C (98°F). However, August experiences significantly higher precipitation, totaling 402 mm (15.8 in) over 26 days, compared to September's 265 mm (10.4 in) spread across 24 days. Additionally, humidity levels remain comparable, with August at 87% and September slightly lower at 86%. For a more detailed look at September's weather, you can visit Vientiane weather in September.
August and October present distinct weather patterns in terms of temperature and precipitation. In August, temperatures range from a minimum of 24°C (75°F) to a maximum of 37°C (98°F), with an average of 28°C (83°F). The month is characterized by high humidity at 87% and significant rainfall, accumulating 402 mm (15.8 in) over 26 days. In contrast, October sees slightly cooler temperatures, with a minimum of 20°C (68°F) and a maximum of 36°C (98°F), while maintaining the same average of 28°C (82°F). The humidity drops to 74%, and precipitation is considerably lower at 129 mm (5.1 in) over just 15 days. For a more detailed look at October’s weather in Vientiane, you can visit Vientiane weather in October.
In August, Vientiane experiences hot and humid weather, characterized by a minimum temperature of 24°C (75°F) and an average of 28°C (83°F). The month sees significant rainfall, with precipitation totaling 402 mm (15.8 in) over 26 days, leading to a high humidity level of 87%. In contrast, November brings a noticeable drop in temperature, with a minimum of 17°C (63°F) and an average of 26°C (79°F), while still reaching a maximum of 36°C (98°F). This month is much drier, with only 10 mm (0.4 in) of rainfall across just 3 days, and humidity levels fall to a more comfortable 63%. For more details, you can check Vientiane weather in November.
August and December present a stark contrast in weather conditions. In August, temperatures soar with a minimum of 24°C (75°F), averaging around 28°C (83°F), and peaking at a sweltering 37°C (98°F). This month is also marked by high humidity at 87% and substantial rainfall, with 402 mm (15.8 in) spread over 26 days. In contrast, December enjoys a much milder climate, where temperatures range from a minimum of 9°C (48°F) to a maximum of 35°C (95°F), averaging 23°C (74°F). Rainfall is minimal at just 7 mm (0.3 in) over a single day, and humidity levels drop to a comfortable 57%. For more details, you can explore Vientiane weather in December.
In August, Vientiane experiences notable shifts in weather, characterized by high humidity levels and significant rainfall. The city's temperatures hover around a warm average, making it feel particularly sweltering during this month. With precipitation occurring on a frequent basis—around 26 days of the month—August stands out as one of the wetter periods of the year. This combination of high humidity and consistent rain contributes to a distinctive tropical atmosphere, setting August apart from the drier months. Visitors should be prepared for these conditions while exploring the vibrant capital. For a deeper understanding of what to expect throughout the year, check out Vientiane Climate.