Last updated: August 27, 2025
In May, Ko Lanta welcomes tropical warmth with an average temperature of 28°C (83°F), peaking at a maximum of 30°C (87°F). The island experiences a shift toward the wet season, evidenced by 255 mm (10.1 in) of rain spread across 27 days, creating a lush, vibrant landscape. With humidity levels hovering around 72%, visitors should prepare for a balmy, albeit occasionally rainy, atmosphere. Exploring the island's natural beauty during this month offers a unique experience for those embracing Ko Lanta's enchanting monsoon charm.
In May, Ko Lanta experiences warm and inviting temperatures, making it an ideal time for sun-seekers. The minimum temperature rises slightly to 26°C (79°F), ensuring that even the early mornings greet you with comforting warmth. Throughout the month, the average temperature remains stable at 28°C (83°F), contributing to the region's tropical charm. With a maximum of around 30°C (87°F), outdoor activities become more appealing, whether you're lounging on the beach or exploring the lush landscapes. Compared to the previous months, May marks a gentle transition into the warmer season, as temperatures begin to hold steady, hinting at summer's approach while still offering manageable heat for travelers.
In May, Ko Lanta experiences a significant surge in precipitation, with an impressive 255 mm (10.1 in) of rain falling over 27 days. This marks the peak of the wet season, following an already soggy April that contributed 180 mm (7.1 in) during its 22 rainy days. As the month progresses, showers become more frequent, transforming the island's vibrant landscape with lush greenery and revitalizing the local ecosystem. This trend continues into June, albeit with slightly less rain, as the atmospheric conditions remain conducive for moisture. May's rainfall not only highlights its role as a pivotal time for nature's revival but also signals the persistent pattern of heavy rain that characterizes the Thai monsoon season, setting the stage for the months ahead.
As May arrives in Ko Lanta, Thailand, the humidity remains relatively moderate at 72%, just slightly above April's 71%. This marks a subtle transition into the wetter months ahead, where humidity levels steadily climb. From June onwards, expect a marked increase, with humidity hitting 79% in both June and July, and peaking at 84% in the later months. This steady rise throughout the summer signals the onset of the rainy season, setting the stage for lush landscapes and vibrant flora as nature comes alive. So, while May offers a comfortable climate, it's a precursor to the more humid months that lie ahead.
In May, Ko Lanta, Thailand, experiences an impressive UV Index of 14, classifying it within the extreme exposure category. This consistently high index reflects a trend throughout the first half of the year, where the UV Index hovers between 12 and 15 from January to April, before slightly easing in June and July. With a burn time of just 10 minutes, visitors should prioritize sun safety and protection, ensuring that they have adequate sunscreen and protective clothing. As the summer approaches, the UV Index remains a crucial consideration for all beachgoers and outdoor enthusiasts in this tropical paradise. For more detailed insights on the UV Index throughout the year, check out the Ko Lanta UV Index.
UV Risk Categories
In Ko Lanta, Thailand, May marks a delightful transition into the monsoon season, boasting an impressive 309 hours of sunshine. This follows a vibrant spring where March shines the brightest with 345 hours, setting a high standard for the summer ahead. Notably, the sunshine hours remain consistently abundant from January through July, with numbers fluctuating but rarely dipping below 301 hours. After May, the trend shows a gentle decline, yet the island's charm endures through the year, with June and July still offering over 300 hours of sunlight. As the rainy season approaches, visitors can soak up lingering rays while enjoying this tropical paradise's stunning beaches and lush landscapes.
As you plan for your May getaway to Ko Lanta, it's important to note that the likelihood of sunny weather dips to 14%, a stark contrast to the brighter months earlier in the year, particularly February, which boasts a 47% chance of sunshine. The transition into May signifies the arrival of the rainy season, echoing patterns seen in both August and the following months, where the sun shines just 14% of the time. While it's a time of lush greenery and tropical beauty, with ample opportunities for exploration, expect occasional rain showers to be part of the experience. Embrace the charm of Ko Lanta’s weather in May, but do come prepared for a mix of sun and clouds!
In Ko Lanta, Thailand, the daylight duration presents a captivating trend that enhances the island's charm throughout the year. From January to February, the days bask in 11 hours of sunlight, offering a cozy atmosphere for visitors. As spring approaches in March and April, daylight stretches to 12 hours, beckoning outdoor adventures and beach bliss. Remarkably, this 12-hour daylight persists from May through September, allowing ample time to explore the island’s stunning landscapes. However, as autumn arrives in October, the hours dwindle back to 11, mirroring the gentle transition into cooler months. This rhythmic ebb and flow of daylight not only defines the island's seasons but also enriches the unforgettable experiences awaiting travelers throughout the year.
In Ko Lanta, Thailand, the wind patterns in May reveal a gentle breeze, with an average speed of 3.6 m/s (8 mph), marking one of the calmer periods of the year. This slight dip follows the increasingly variable winds of earlier months, such as January and February, which boast averages of 5.7 m/s and 5.3 m/s respectively. As the region transitions from April's mild winds, May presents a tranquil atmosphere ideal for enjoying the stunning beaches and vibrant marine life. Interestingly, as summer approaches in June, wind speeds pick up slightly to 3.9 m/s, hinting at a seasonal shift that brings renewed breeziness through the following months. Overall, May embodies a brief peaceful interlude in Ko Lanta's breezy calendar, inviting visitors to savor the serenity before the winds pick back up.
Weather in Ko Lanta varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Ko Lanta, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of May and January, May typically exhibits warmer temperatures with a minimum of 26°C (79°F) and an average of 28°C (83°F), while January shows slightly cooler conditions with a minimum of 24°C (75°F) and an average of 27°C (81°F). Both months reach similar maximum temperatures of around 30°C (86-87°F). However, May is characterized by significantly higher precipitation, receiving 255 mm (10.1 in) over 27 days, compared to January's 98 mm (3.9 in) over just 8 days, making January a drier option overall. The humidity remains fairly high in both months, with January at 76% and May at 72%. For more detailed information, you can check Ko Lanta weather in January.
In comparing the weather of May and February, we see notable differences. February generally enjoys a slightly cooler climate with an average temperature of 27°C (82°F), while May warms up a bit more, averaging 28°C (83°F). However, May is significantly wetter, experiencing 255 mm (10.1 in) of precipitation over 27 days, in stark contrast to February's minimal 9 mm (0.3 in) over just 2 days. Both months have similar humidity levels, with February at 73% and May at 72%. For more details on February weather in Ko Lanta, you can visit Ko Lanta weather in February.
In comparing the weather in May and March, both months exhibit similar average temperatures, around 28°C (83°F). However, May sees higher humidity at 72% compared to March's 74%, coupled with a noticeable increase in precipitation. May experiences a total of 255 mm (10.1 in) of rain over 27 days, making it significantly wetter than March, which sees only 33 mm (1.3 in) of rain over 8 days. Notably, while March can have maximum temperatures reaching up to 32°C (89°F), May's maximum typically peaks at a cooler 30°C (87°F). For a more detailed look at weather conditions, check out Ko Lanta weather in March.
In comparing the weather between April and May, we find that both months experience similar average temperatures, with May's minimum at 26°C and max at 30°C, while April's range is slightly warmer, from a minimum of 25°C to a maximum of 31°C. However, May is characterized by significantly higher precipitation, totaling 255 mm over 27 days, compared to April's 180 mm over 22 days. The humidity levels remain relatively close, with May at 72% and April at 71%. Overall, May tends to be wetter and more humid, making it feel a bit more oppressive than April. For more detailed insights, check out Ko Lanta weather in April.
May and June exhibit similar temperature patterns, with both months featuring average highs of 30°C (87°F) and lows around 25-26°C (78-79°F). However, May tends to be wetter, receiving 255 mm (10.1 in) of precipitation over 27 days, compared to June's 234 mm (9.2 in) spread over 23 days. Notably, June also experiences slightly higher humidity at 79%, compared to May's 72%. For more detailed insights, you can check Ko Lanta weather in June.
In comparison, the weather in May and July showcases similar temperature ranges, with both months experiencing minimums around 26°C (79°F) and average highs of approximately 30°C (86-87°F). However, May tends to be wetter, receiving significantly more precipitation at 255 mm (10.1 in) across 27 days, compared to July's 203 mm (8.0 in) over just 18 days. Additionally, humidity levels are slightly higher in July at 79%, compared to May's 72%. For more details on the weather patterns during this time, you can check Ko Lanta weather in July.
In comparing the weather between May and August, both months experience similar average temperatures, hovering around 28°C (82°F), with daytime highs reaching 30°C (86-87°F). However, May tends to be slightly wetter, receiving 255 mm (10.1 in) of rainfall over 27 days, compared to August's 241 mm (9.5 in) spread across 21 days. Additionally, August has a higher humidity level at 82%, while May records a relative humidity of 72%. For more detailed insights on August weather, you can visit Ko Lanta weather in August.
May and September showcase a transition in weather patterns, with both months exhibiting warm temperatures and significant rainfall. In May, the temperature ranges from a minimum of 26°C (79°F) to a maximum of 30°C (87°F), with an average of 28°C (83°F). However, the month also sees considerable precipitation, totaling 255 mm (10.1 in) over 27 days, along with a humidity level of 72%. In contrast, September is slightly cooler, with temperatures ranging from 25°C (78°F) to 29°C (85°F) and an average of 27°C (82°F). This month experiences even higher rainfall, amounting to 306 mm (12.0 in) across 24 days and a rise in humidity to 84%. For more detailed information, check out Ko Lanta weather in September.
May and October on Ko Lanta both feature warm temperatures, but they have notable differences in weather conditions. In May, temperatures range from a minimum of 26°C (79°F) to a maximum of 30°C (87°F), with an average of 28°C (83°F). However, it is a particularly wet month, receiving 255 mm (10.1 in) of rain over 27 days and humidity levels at 72%. In contrast, October experiences slightly cooler temperatures, with a minimum of 25°C (77°F) and an average of 27°C (81°F), while still peaking at 30°C (86°F). Nonetheless, it sees increased rainfall, accumulating 314 mm (12.4 in) over 26 days, accompanied by higher humidity at 83%. For more detailed information on October weather, you can check Ko Lanta weather in October.
May and November showcase similar temperature ranges with minimums around 25-26°C (77-79°F), and maximums peaking at 30°C (87°F). However, while May averages slightly higher at 28°C (83°F), November has a marginally lower average of 27°C (81°F). Both months experience high humidity levels, with November being more humid at 84% compared to May's 72%. Precipitation levels are also comparable, with May receiving 255 mm (10.1 in) over 27 days and November having 257 mm (10.1 in) over 26 days. To learn more about the weather conditions in November, check out Ko Lanta weather in November.
In May, the weather is characterized by warmer temperatures, with minimums around 26°C (79°F) and maximums reaching up to 30°C (87°F), while the average sits at 28°C (83°F). However, this month sees significant rainfall, with 255 mm (10.1 in) of precipitation spread over 27 days, resulting in a humidity level of 72%. In contrast, December offers slightly cooler temperatures, with a minimum of 24°C (76°F) and a similar maximum of 30°C (86°F), averaging 27°C (81°F). The precipitation drops notably to 134 mm (5.3 in) across just 14 days, accompanied by higher humidity at 84%. For more detailed information on conditions during this month, you can visit Ko Lanta weather in December.
As May unfolds in Ko Lanta, the island experiences a noticeable shift in weather patterns compared to the preceding months. With temperatures hovering around a cozy 28°C (83°F), visitors can expect warm days characterized by high humidity levels of 72%. This month also heralds the onset of the rainy season, bringing increased precipitation with approximately 255 mm falling over 27 days. The lush landscapes come alive, but it's wise to prepare for occasional downpours. Those looking to explore the island during this transition can gain valuable insights by checking the comprehensive details at Ko Lanta Climate.