May weather forecast
Pattaya, Thailand

May can be best described as the advent of heavy monsoon in Pattaya. There is a proliferation in rainfall, reaching a significant figure of 148mm (5.83"). As the rainy season takes hold, fluctuations in temperature narrow and sea temperatures start to retreat. Even though rainfall is persistent, Pattaya does not see a drastic decline in sunshine hours. Heavy showers interspersed with sunny spells define the month’s weather.

Temperature

The transition into May is marked with an average high-temperature of a still hot 32.4°C (90.3°F), showing an insignificant shift from April's 32.9°C (91.2°F). Pattaya records an average low of 26.4°C (79.5°F) throughout the nights in May.

Heat index

For May, the heat index is appraised at a life-threatening hot 45°C (113°F). Observe: Heat exhaustion and heat cramps are probable. Heatstroke is on the horizon with prolonged exertion.
Keep in mind the heat index values are meant for areas in shade and with light wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In Pattaya, the average relative humidity in May is 78%.

Rainfall

In Pattaya, Thailand, in May, during 12 rainfall days, 148mm (5.83") of precipitation is typically accumulated. Throughout the year, there are 106 rainfall days, and 1111mm (43.74") of precipitation is accumulated.

Sea temperature

May is the month with the warmest seawater, with an average sea temperature of 30°C (86°F).
Note: It is common to find waters above 30°C (86°F) less appealing for a refreshing dip.

Daylight

The average length of the day in May in Pattaya, Thailand, is 12h and 43min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:31. On the last day of May, sunrise is at 05:49 and sunset at 18:39 +07.

Sunshine

In May, the average sunshine is 6h.

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 12 in May transforms into this advice:
Undertake every vital safety procedure, as unprotected skin and eyes could sustain burns in no time. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Frequent reapplication of a broad-spectrum SPF 30+ sunscreen is vital every two hours or directly after a swim or an outdoor workout. Stay aware! UV radiation is magnified when reflecting off sand and water.