May weather forecast
Hua Hin, Thailand

The last month of the spring, May, is also a hot month in Hua Hin, Thailand, with temperature in the range of an average low of 26°C (78.8°F) and an average high of 33.6°C (92.5°F).

Temperature

April and May, with an average high-temperature of 33.6°C (92.5°F), are the warmest months.

Heat index

In May, the average heat index is computed to be a life-threatening hot 47°C (116.6°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, wind, differences in body mass, height, and shape, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in May is 74%.

Rainfall

In Hua Hin, during May, the rain falls for 13 days and regularly aggregates up to 109mm (4.29") of precipitation. In Hua Hin, during the entire year, the rain falls for 118 days and collects up to 955mm (37.6") of precipitation.

Sea temperature

April through June, with an average sea temperature of 30°C (86°F), are months with the warmest seawater in Hua Hin.
Note: The water temperature above 30°C (86°F) is arguably regarded as unpleasant. The primary purpose of entering the water - cooling down from sunshine and high temperatures - is lost.

Daylight

In Hua Hin, Thailand, the average length of the day in May is 12h and 43min.
On the first day of May, sunrise is at 06:00 and sunset at 18:34. On the last day of the month, sunrise is at 05:53 and sunset at 18:42 +07.

Sunshine

In Hua Hin, Thailand, the average sunshine in May is 7h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 12 in May interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.