May weather forecast
Phuket, Thailand

May’s weather in Phuket signals the arrival of monsoon season. Temperatures, still high at 32.8°C (91°F), become less of a focal point as precipitation escalates sharply reaching a whopping 260mm (10.24"). This heightened rainfall contributes to peak humidity levels. Its effect, however, is moderated by fewer hours of sunshine and relatively warmer sea conditions. As May hands over to June, the frequency of rainfall days heightens.

Temperature

The arrival of May in Phuket brings an average high-temperature of a still tropical 32.8°C (91°F), subtly diverging from April's 33.9°C (93°F). Throughout May nights, Phuket registers an average low-temperature of 25.6°C (78.1°F).

Heat index

For May, the heat index is estimated at a burning hot 47°C (116.6°F). Stay vigilant: Heat cramps along with heat exhaustion are expected. Heatstroke may follow prolonged exertion.
Know that the heat index computations account for shaded terrains and slight winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. 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. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In May, the average relative humidity in Phuket is 79%.

Rainfall

In Phuket, Thailand, in May, it is raining for 21 days, with typically 260mm (10.24") of accumulated precipitation. In Phuket, Thailand, during the entire year, the rain falls for 170 days and collects up to 2220mm (87.4") of precipitation.

Sea temperature

April through June, with an average sea temperature of 30°C (86°F), are months with the warmest seawater.
Note: Seeking a refreshing experience in waters over 30°C (86°F) can be challenging.

Daylight

The average length of the day in May is 12h and 29min.
On the first day of May in Phuket, Thailand, sunrise is at 06:11 and sunset at 18:35. On the last day of the month, sunrise is at 06:07 and sunset at 18:41 +07.

Sunshine

The average sunshine in May is 6.1h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 12 in May interprets into the following recommendations:
Undertake all critical precautions. Protection from sun harm is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Apply and frequently reapply a broad-spectrum SPF 30+ sunscreen after every two hours, or immediately after a swim or outdoor exercise. Caution! The Sun's UV intensity grows with reflections off sand and water.