May weather forecast
Thailand

May acts as a transitional month in Thailand, bridging the gap between the intense summer and the onset of the monsoon season. As May progresses, there's an evident shift in weather dynamics with temperatures slightly receding, coupled with an increase in humidity and rain showers.

Northern Thailand, near the borders with Myanmar and Laos, starts experiencing more cloud cover and occasional rain showers. While the temperatures remain warm, ranging from 30°C (86°F) to 34°C (93.2°F), the influx of moisture lends a slight relief to the parched regions.

Bangkok and its neighboring areas, having endured the summer's peak, now welcome sporadic rain showers. These pre-monsoon showers, although intermittent, offer brief respites from the oppressive heat. Average temperatures hover around 32°C (89.6°F) to 35°C (95°F), but the increased humidity can make the environment feel warmer than the actual readings suggest.

As May advances, the frequency and intensity of rain showers grow. By the latter half of the month, the southwest monsoon begins making its presence felt, especially in the western and southern regions of the country. The rain showers, though still not at their peak, set the stage for the rainy season that is poised to unfold in the coming months.

Comparatively, May stands as a month of change. The oppressive heat of April gradually yields to increasing cloud cover and showers. While it doesn't bear the full brunt of the monsoon yet, May's weather patterns hint at the wetter months that lie ahead for Thailand.

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• Bangkok - May »
  May is the month with the warmest seawater with an average sea temperature of 29.9°C (85.8°F). The month with the warmest seawater in Bangkok is May, with an average sea temperature of 29.9°C (85.8°F).
• Chiang Mai - May »
  On the first day of May in Chiang Mai, sunrise is at 05:56 and sunset at 18:45. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit degrees.
• Pattaya - May »
  In May, the average sea temperature in Pattaya is 30°C (86°F). Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat.
• Phuket - May »
  The months with the warmest seawater in Phuket are April through June, with an average sea temperature of 30°C (86°F). On the last day of the month, in Phuket, Thailand, sunrise is at 06:07 and sunset at 18:40 +07.
• Nakhon Ratchasima - May »
  On the last day of the month, in Nakhon Ratchasima, Thailand, sunrise is at 05:40 and sunset at 18:37 +07. Moving on to May, the city of Nakhon Ratchasima shows signs of transition from summer to monsoon with a whopping 154mm (6.06") rainfall.
• Udon Thani - May »
  On the last day of the month, in Udon Thani, Thailand, sunrise is at 05:33 and sunset at 18:39 +07. In Udon Thani during May, the rain falls for 16 days and regularly aggregates up to 199mm (7.83") of precipitation.
• Hua Hin - May »
  As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues. The average heat index, which factors the actual air temperature with the relative humidity, in May is calculated to be 47°C (116.6°F).
• Krabi - May »
  The months with the warmest seawater in Krabi are April through June, with an average sea temperature of 30°C (86°F). On the last day of the month, in Krabi, sunrise is at 06:05 and sunset at 18:38 +07.
• Hat Yai - May »
  The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth.
• Surat Thani - May »
  April through June, with an average sea temperature of 30°C (86°F), are months with the warmest seawater in Surat Thani. April through June, with an average sea temperature of 30°C (86°F), are months with the warmest seawater in Surat Thani.
• Chiang Rai - May »
  March through September, with an average maximum UV index of 12, are months with the highest UV index in Chiang Rai. On the first day of May in Chiang Rai, sunrise is at 05:51 and sunset at 18:43.
• Khon Kaen - May »
  In Khon Kaen, during the entire year, the rain falls for 108 days and collects up to 1247mm (49.09") of precipitation. With the arrival of May, Khon Kaen's average high-temperature registers at a tropical 34.5°C (94.1°F), indicating a subtle variation from the previous month.