Chiang Mai
Thailand
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Chiang Mai, Thailand

The stunning aerial panorama of the fantastic Two Pagoda on top of the Doi Inthanon mountain in Chiang Mai, Thailand
The stunning aerial panorama of the fantastic Two Pagoda on top of the Doi Inthanon mountain in Chiang Mai, Thailand
May, the last month of the spring, in Chiang Mai, is another hot month, with average temperature varying between 34.2°C (93.6°F) and 23.8°C (74.8°F).

Temperature

In May, the average high-temperature is practically the same as in April - a tropical 34.2°C (93.6°F). In Chiang Mai, the average low-temperature is 23.8°C (74.8°F).

Heat index

In May, the average heat index is evaluated at a burning hot 48°C (118.4°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, clothing, pregnancy), 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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 Chiang Mai, Thailand, the average relative humidity is 71%.

Rainfall

In May, in Chiang Mai, the rain falls for 14 days. Throughout May, 162mm (6.4") of precipitation is accumulated. Throughout the year, in Chiang Mai, there are 113 rainfall days, and 1130.6mm (44.5") of precipitation is accumulated.

Daylight

In May, the average length of the day in Chiang Mai is 13h.

Sunshine

In Chiang Mai, the average sunshine in May is 7h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 12 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.

What is the temperature in May in Chiang Mai?

The average high-temperature, in May, in Chiang Mai, is 34.2°C (93.6°F), while the average low-temperature is 23.8°C (74.8°F). In May, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, is evaluated at 48°C (118.4°F).

What is the average humidity in May in Chiang Mai?

In Chiang Mai, the average relative humidity in May is 71%.

How many days does it rain in May in Chiang Mai?

In Chiang Mai, in May, it is raining for 14 days, with typically 162mm (6.4") of accumulated precipitation.

How many hours of daylight does Chiang Mai have in May?

The average length of the day in May is 13h.

How long on average sun shines in May in Chiang Mai?

In May, the average sunshine in Chiang Mai, Thailand, is 7h.

What is the month with the highest UV index in Chiang Mai?

Months with the highest UV index are March through September, with an average maximum UV index of 12.

How high is the UV index in May in Chiang Mai?

In Chiang Mai, Thailand, the average daily maximum UV index in May is 12. A UV Index reading of 11, and higher, represents an extreme health threat from unprotected exposure to the UV radiation.
Average temperature in May - Chiang Mai, Thailand
  • Average high temperature in May: 34.2°C

The warmest month (with the highest average high temperature) is April (36.5°C).
The month with the lowest average high temperature is December (28.6°C).

  • Average low temperature in May: 23.8°C

The month with the highest average low temperature is June (24°C).
The coldest month (with the lowest average low temperature) is January (14.9°C).

Average humidity in May - Chiang Mai, Thailand
  • Average humidity in May: 71%

Months with the highest relative humidity are August and September (81%).
The month with the lowest relative humidity is March (52%).

Average rainfall in May - Chiang Mai, Thailand
  • Average rainfall in May: 162mm

The wettest month (with the highest rainfall) is August (216.9mm).
The driest month (with the lowest rainfall) is January (4.2mm).

Average rainfall days in May - Chiang Mai, Thailand
  • Average rainfall days in May: 14 days

The month with the highest number of rainy days is September (20 days).
Months with the lowest number of rainy days are January and December (1 days).

Average daylight in May / Average sunshine in May - Chiang Mai, Thailand
  • Average daylight in May: 13h

The month with the longest days is June (Average daylight: 13.3h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in May: 7h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are August and September (Average sunshine: 5.2).

Average UV index in May - Chiang Mai, Thailand
  • Average UV index in May: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).