Last updated: August 27, 2025
In Mae Sai, Thailand, the weather in May showcases a vibrant interplay of heat and humidity. Daily maximum temperatures can soar to an impressive 41°C (107°F), while the average hovers around a comfortable 28°C (82°F). As the month unfolds, residents and visitors can expect a splash of rain, with 167 mm (6.6 in) of precipitation spread across roughly 18 days. This tropical climate, characterized by 56% humidity, creates a lively atmosphere, making Mae Sai an intriguing destination for those ready to embrace both the sun and the tropical showers.
In Mae Sai, Thailand, the month of May marks a transition into the sweltering summer, characterized by a noticeable increase in temperatures. With minimums rising to 20°C (69°F) and average temperatures peaking at around 28°C (82°F), May feels distinctly warmer than the preceding months. The maximum daily temperatures can soar to 41°C (107°F), making it one of the hottest months of the year. This upward trend from the cooler early months highlights the gradual shift towards the peak heat of summer, encouraging visitors to brace themselves for the intense warmth while exploring the region's vibrant landscapes and culture. As the heat becomes more pronounced, the lush greenery and natural beauty of Mae Sai thrive, showcasing nature’s resilience in the face of the rising temperatures.
May marks a significant transition in Mae Sai, Thailand, as the region experiences a dramatic increase in precipitation. With 167 mm (6.6 in) of rain falling over 18 days, May sets the stage for the wet season that follows. This surge in rainfall is nearly 33% higher than April’s totals and indicates the onset of more consistent rain patterns that will dominate the coming months. As temperatures rise, the frequent showers not only rejuvenate the landscape but also prepare it for the heavier deluge that characterizes June and July, showcasing a clear trend toward increased moisture that is essential for local agriculture and ecosystems.
In May, Mae Sai, Thailand, experiences a notable uptick in humidity, rising to 56% after the drier months of April. This shift signals the transition into the wetter season, as the surrounding climate begins to warm and prepare for the heavy rains of summer. The humidity levels in May not only surpass the previous month but also set the stage for a significant increase in the coming months, peaking at 92% in August. This trend illustrates the striking contrast in Mae Sai's climate, highlighting how the region swiftly transforms from milder conditions to a lush, humid landscape as it heads deeper into the monsoon season.
In Mae Sai, Thailand, the UV Index steadily climbs as spring transitions into summer, peaking in May with a remarkable UV Index of 14, categorized as extreme. This signifies a notable trend in increasing sun intensity, with a dangerously short burn time of just 10 minutes. Following May, the UV Index remains high throughout June to September, consistently staying at 14, which highlights the region's intense sunshine during these months. As the year progresses, the levels gradually taper off, returning to a very high category by November. If you plan to venture outdoors during this time, be sure to take appropriate sun protection measures. For more details on daily UV levels and safety tips, visit Mae Sai UV Index.
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Nestled in the vibrant landscapes of Mae Sai, Thailand, May shines as a delightful gateway into the lush rainy season, boasting an impressive 323 hours of sunshine. This month follows a gradual increase in daylight, starting with 236 hours in January and climbing steadily throughout the spring, peaking in March at 328 hours. Though a slight dip occurs as June approaches, May retains a remarkable brightness, suggesting an inviting atmosphere for travelers and locals alike. The trends indicate that while the clouds may soon roll in, this month offers a perfect blend of warmth and illumination, making it a prime time to soak in the natural beauty of this enchanting region.
In Mae Sai, Thailand, the weather in May presents a notable dip in sunny days, with a chance of sun dropping to just 39%. This decline follows a promising surge in March, where sunlit skies prevail 82% of the time, and a moderate April, which holds at 41%. As May approaches, the shift signals the onset of the wet season, leading into June and July, where opportunities for sunshine drastically decrease to 11% and 15%, respectively. Thus, while early spring boasts a more vibrant sun, the arrival of May marks a transition into a more overcast and humid phase in Mae Sai's climate.
In Mae Sai, Thailand, the daylight duration follows an intriguing pattern throughout the year, showcasing the region's seasonal transitions. From January to February, daylight remains steady at 11 hours, creating a consistent start to the year. As spring approaches in March and April, this duration increases to 12 hours, signaling longer days ahead. May marks a noticeable shift with 13 hours of daylight, ushering in the peak of brightness that continues through June and July. As the summer months wane, daylight begins to taper off gradually; August and September return to 12 hours, while October to December sees a decline back to 11 hours and 10 hours, respectively. This rhythm of daylight reflects Mae Sai's vibrant climate, welcoming longer days in the summer and the gentle retreat of light as the year progresses.
In Mae Sai, Thailand, the wind speed in May remains steady at 1.2 m/s (3 mph), consistent with the gentle breezes typical of the preceding months. Throughout early spring, the winds tend to ease a bit, reaching their lowest in April at 1.1 m/s before picking up slightly again as May arrives. This pattern reflects a calm atmosphere, ideal for outdoor activities. As the seasons shift into the wetter months of June and July, a slight increase to 1.4 m/s suggests a potential rise in wind dynamics, indicating a transition toward the monsoon while preserving an overall tranquil environment typical of northern Thailand’s climate.
Weather in Mae Sai varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Mae Sai, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit striking differences in weather conditions. In May, temperatures soar with a minimum of 20°C (69°F) and an average of 28°C (82°F), reaching highs of up to 41°C (107°F). This month also experiences significant rainfall, with 167 mm (6.6 in) spread across 18 days, contributing to a humidity level of 56%. In contrast, January offers a much cooler climate, with minimum temperatures dropping to 8°C (47°F), an average of 20°C (68°F), and maximum temperatures peaking at 32°C (90°F). Precipitation is much lighter in January, totaling only 44 mm (1.7 in) over 6 days, and the humidity remains slightly lower at 54%. For more details on January's weather, visit Mae Sai weather in January.
May is typically much warmer than February, with average temperatures reaching 28°C (82°F) compared to February's 21°C (71°F). The peak temperatures in May can soar to a maximum of 41°C (107°F), while February’s highs only reach 35°C (95°F). Moreover, May experiences significantly more rainfall, with 167 mm (6.6 in) spread across 18 days, in stark contrast to February’s 18 mm (0.7 in) over just 2 days. Despite these differences, humidity levels are relatively similar, with May at 56% and February at 52%. For more details, you can check Mae Sai weather in February.
When comparing the weather in March and May, it’s clear that May is significantly warmer and wetter. In May, temperatures range from a minimum of 20°C (69°F) to a maximum of 41°C (107°F), with an average of 28°C (82°F). In contrast, March experiences milder conditions, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 38°C (101°F) and an average of 25°C (77°F). Additionally, May sees much higher precipitation, averaging 167 mm (6.6 in) over 18 days, while March has only 17 mm (0.7 in) during just 3 days of rainfall. Humidity levels also increase in May, reaching 56% compared to 40% in March. For more detailed information, check out Mae Sai weather in March.
In comparing the weather of May and April, May tends to be hotter with an average temperature of 28°C (82°F) and a maximum of 41°C (107°F), whereas April sees slightly cooler temperatures, averaging 27°C (80°F) with a peak of 40°C (105°F). Precipitation also increases in May, with 167 mm (6.6 in) of rain over 18 days, compared to April's 125 mm (4.9 in) over 11 days. Additionally, the humidity rises notably in May to 56%, compared to 36% in April, making the latter generally more comfortable. For a more detailed look at April's weather, you can explore Mae Sai weather in April.
In comparing the weather of May and June, we see distinct differences that highlight the transition into the more humid summer months. May experiences a minimum temperature of 20°C (69°F) and a maximum of 41°C (107°F), with an average temperature remaining steady at 28°C (82°F). Although it is slightly cooler than June, May sees significant rainfall, totaling 167 mm (6.6 in) across 18 days and maintaining a humidity level of 56%.
In contrast, June starts with a higher minimum temperature of 23°C (73°F) but features a lower maximum temperature of 38°C (101°F), lending a slightly cooler peak to the month. However, June is marked by increased precipitation of 348 mm (13.7 in) over 26 days and a rise in humidity to 82%. This shift indicates that while both months share the same average temperature, June's weather is characterized by prolonged rainfall and higher humidity levels. For more detailed weather conditions in June, you can visit Mae Sai weather in June.
In May, temperatures range from a minimum of 20°C (69°F) to a maximum of 41°C (107°F), with an average of 28°C (82°F). The month experiences about 167 mm (6.6 in) of precipitation over 18 days, with humidity levels around 56%. In contrast, July brings slightly milder temperatures, with a minimum of 23°C (73°F), an average of 27°C (81°F), and a maximum of 38°C (100°F). However, it is significantly wetter, accumulating 372 mm (14.7 in) of rainfall across 28 days, alongside much higher humidity levels at 90%. This stark difference highlights how July tends to be more humid and wetter than May. For more details, visit Mae Sai weather in July.
May and August present contrasting weather patterns, highlighting the transition from late spring to the peak of the monsoon season. In May, temperatures range from a minimum of 20°C (69°F) to a maximum of 41°C (107°F), with an average of 28°C (82°F) and relatively moderate humidity at 56%. However, it experiences substantial rainfall, totaling 167 mm (6.6 in) over about 18 days.
In contrast, August brings cooler averages but significantly higher humidity, with minimum temperatures around 23°C (73°F), an average of 27°C (81°F), and maximums peaking at 36°C (98°F). The month is much wetter, recording 430 mm (16.9 in) of precipitation across 27 days, leading to a much more humid environment at 92%. For more detailed information, you can check Mae Sai weather in August.
May and September present contrasting weather patterns, particularly in terms of temperature and precipitation. In May, temperatures can soar up to a maximum of 41°C (107°F), with an average of 28°C (82°F) and relatively lower humidity at 56%. However, the month also sees considerable rainfall, recorded at 167 mm (6.6 in) over 18 days. In contrast, September brings slightly cooler temperatures, peaking at 37°C (98°F) with an average of 27°C (81°F), but the humidity rises significantly to 85%. Additionally, September experiences more rainfall, totaling 272 mm (10.7 in) over 23 days. For more detailed information, you can check Mae Sai weather in September.
In comparing the weather between May and October, we see distinct differences in temperature and humidity. May tends to be hotter, with average temperatures reaching 28°C (82°F) and maximums soaring to 41°C (107°F), while October offers a slightly cooler climate with averages around 26°C (78°F) and maximums of 35°C (94°F). Additionally, October experiences higher humidity at 70%, compared to May's 56%, which can make it feel warmer. Precipitation is somewhat comparable, with May having 167 mm (6.6 in) over 18 days and October receiving 158 mm (6.2 in) across 20 days. For more specific details on October weather, you can check Mae Sai weather in October.
In comparing the weather between May and November, we see significant differences in temperature and precipitation. May typically experiences warmer temperatures, with minimums around 20°C (69°F), averages of 28°C (82°F), and maximums reaching as high as 41°C (107°F). This month also sees considerable rainfall, averaging 167 mm (6.6 in) over 18 days, contributing to a humidity level of 56%.
In contrast, November offers a much cooler climate, with minimum temperatures dipping to 14°C (57°F), an average of 23°C (74°F), and maximums of 34°C (93°F). Rainfall is also significantly less, with only 49 mm (1.9 in) over 9 days, alongside a higher humidity of 67%. For more details on November weather, you can visit Mae Sai weather in November.
May and December present contrasting weather patterns. In May, temperatures soar with minimums around 20°C (69°F) and maximums peaking at 41°C (107°F), accompanied by a significant amount of precipitation totaling 167 mm (6.6 in) over 18 days, resulting in a humidity level of 56%. In stark contrast, December boasts much cooler temperatures, with a minimum of 6°C (44°F) and a maximum of 31°C (89°F). This month experiences far less rainfall, totaling only 35 mm (1.4 in) over just 4 days, and a slightly higher humidity of 62%. For more detailed insight into December's weather, you can visit Mae Sai weather in December.
As May arrives in Mae Sai, the weather sees a notable shift, characterized by increased humidity and intense heat. With temperatures reaching their peak, days can feel sweltering, contrasting sharply with the more temperate weather of earlier months. Frequent rain showers add to the mix, bringing relief during those hot days while also marking the transition into the rainy season. The overall experience of May weather showcases a vibrant tapestry of heat and rainfall, making it a unique month in the annual climate cycle of Mae Sai. For more detailed insights, check out Mae Sai Climate.