Hua Hin
Thailand
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Hua Hin, Thailand

Beautiful blue sky, clear water, and rocks on the white sandy beach of Sainoi in Hua Hin, Thailand, with a beautiful forest mountain
Beautiful blue sky, clear water, and rocks on the white sandy beach of Sainoi in Hua Hin, Thailand, with a beautiful forest mountain
The last month of the spring, May, is also a hot month in Hua Hin, Thailand, with average temperature fluctuating between 26°C (78.8°F) and 33.6°C (92.5°F).

Temperature

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

Heat index

The average heat index is evaluated at a burning hot 47.4°C (117.3°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 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. 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

In Hua Hin, the average relative humidity is 74%.

Rainfall

In Hua Hin, during 13 rainfall days, 108.9mm (4.3") of precipitation is typically accumulated. Throughout the year, there are 118 rainfall days, and 955.1mm (37.6") of precipitation is accumulated.

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: For swimming, other intense water activities, temperature above 30°C (86°F) is arguably unpleasant, as the water cooling effect is missing.

Daylight

The average length of the day in Hua Hin is 12.7h.

Sunshine

In May, the average sunshine is 7h.

UV index

Months with the highest UV index in Hua Hin are February through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 12 in May transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the warmest month in Hua Hin?

Warmest months in Hua Hin are April and May, with an average high-temperature of 33.6°C (92.5°F).

What is the temperature in May in Hua Hin?

In Hua Hin, in May, the average high-temperature is 33.6°C (92.5°F), and the average low-temperature is 26°C (78.8°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, in May is appraised at 47.4°C (117.3°F).

What is the average humidity in May in Hua Hin?

The average relative humidity in May in Hua Hin is 74%.

How much does it rain in Hua Hin in May?

In Hua Hin, in May, during 13 rainfall days, 108.9mm (4.3") of precipitation is typically accumulated.

What are the months with the warmest sea water in Hua Hin?

April through June, with an average sea temperature of 30°C (86°F), are months with the warmest seawater in Hua Hin.

What is the sea water temperature in May in Hua Hin?

In Hua Hin, Thailand, the average seawater temperature in May is 30°C (86°F). 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.

What is the average length of the day in May in Hua Hin?

The average length of the day in May in Hua Hin, Thailand, is 12.7h.

How many hours of sunshine does Hua Hin have in May?

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

When is the highest UV index in Hua Hin?

Months with the highest UV index in Hua Hin are February through October, with an average maximum UV index of 12.

How high is the UV index in May in Hua Hin?

The average daily maximum UV index in May in Hua Hin, Thailand, is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unsafe exposure to the Sun's UV rays.
Average temperature in May - Hua Hin, Thailand
  • Average high temperature in May: 33.6°C

Warmest months (with the highest average high temperature) are April and May (33.6°C).
The month with the lowest average high temperature is December (29.5°C).

  • Average low temperature in May: 26°C

The month with the highest average low temperature is May (26°C).
The coldest month (with the lowest average low temperature) is January (22.2°C).

Average humidity in May - Hua Hin, Thailand
  • Average humidity in May: 74%

The month with the highest relative humidity is October (80%).
The month with the lowest relative humidity is December (67%).

Average rainfall in May - Hua Hin, Thailand
  • Average rainfall in May: 108.9mm

The wettest month (with the highest rainfall) is October (246.2mm).
The driest month (with the lowest rainfall) is December (7.9mm).

Average rainfall days in May - Hua Hin, Thailand
  • Average rainfall days in May: 13 days

The month with the highest number of rainy days is August (18 days).
Months with the lowest number of rainy days are January, February, March and December (2 days).

Average sea temperature in May - Hua Hin, Thailand
  • Average sea temperature in May: 30°C

Best months for swimming (with the highest average sea temperature) are April, May and June (30°C).
Coldest months (with the lowest average sea temperature) are January, February and December (28°C).

Average daylight in May / Average sunshine in May - Hua Hin, Thailand
  • Average daylight in May: 12.7h

The month with the longest days is June (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.4h).

  • Average sunshine in May: 7h

Months with most sunshine are January, February, March and December (Average sunshine: 9h).
Months with least sunshine are June, July, August and September (Average sunshine: 5).

Average UV index in May - Hua Hin, Thailand
  • Average UV index in May: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 9).