Chiang Rai
Thailand
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Chiang Rai, Thailand

The White Temple of Wat Rong Khun with a waterfront fishpond in Chiang Rai, Thailand, on a beautiful cloudy day panorama
The White Temple of Wat Rong Khun with a waterfront fishpond in Chiang Rai, Thailand, on a beautiful cloudy day panorama
May, the last month of the spring, in Chiang Rai, is another tropical month, with average temperature ranging between max 33.1°C (91.6°F) and min 22.5°C (72.5°F).

Temperature

In Chiang Rai, the average high-temperature is essentially the same as in April - a still tropical 33.1°C (91.6°F). In Chiang Rai, Thailand, in May, the average low-temperature is 22.5°C (72.5°F).

Heat index

The average heat index in May is estimated at a blazing hot 46.6°C (115.9°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. 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', 'real feel', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, pregnancy). 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 especially crucial for babies and toddlers. 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. 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 exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In May, the average relative humidity is 76%.

Rainfall

In Chiang Rai, in May, during 17 rainfall days, 213.4mm (8.4") of precipitation is typically accumulated. Throughout the year, in Chiang Rai, there are 137 rainfall days, and 1690.5mm (66.6") of precipitation is accumulated.

Daylight

In Chiang Rai, the average length of the day is 13.1h.

Sunshine

In Chiang Rai, Thailand, the average sunshine is 7h.

UV index

Months with the highest UV index in Chiang Rai are March through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 12 in May transform into the following instructions:
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 Rai?

The average high-temperature, in May, in Chiang Rai, is 33.1°C (91.6°F), while the average low-temperature is 22.5°C (72.5°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, in May is appraised at 46.6°C (115.9°F).

What is the average humidity in May in Chiang Rai?

In Chiang Rai, the average relative humidity in May is 76%.

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

In May, in Chiang Rai, the rain falls for 17 days. Throughout May, 213.4mm (8.4") of precipitation is accumulated.

What is the average length of the day in May in Chiang Rai?

In Chiang Rai, Thailand, the average length of the day in May is 13.1h.

How many hours of sunshine does Chiang Rai have in May?

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

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

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

What is the UV index intensity in May in Chiang Rai?

In May, the average daily maximum UV index is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from unsafe exposure to the Sun's UV rays.
Average temperature in May - Chiang Rai, Thailand
  • Average high temperature in May: 33.1°C

The warmest month (with the highest average high temperature) is April (34.8°C).
The month with the lowest average high temperature is December (27.2°C).

  • Average low temperature in May: 22.5°C

The month with the highest average low temperature is June (23.6°C).
The coldest month (with the lowest average low temperature) is January (12.8°C).

Average humidity in May - Chiang Rai, Thailand
  • Average humidity in May: 76%

The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is March (62%).

Average rainfall in May - Chiang Rai, Thailand
  • Average rainfall in May: 213.4mm

The wettest month (with the highest rainfall) is August (358.4mm).
The driest month (with the lowest rainfall) is January (7.5mm).

Average rainfall days in May - Chiang Rai, Thailand
  • Average rainfall days in May: 17 days

The month with the highest number of rainy days is August (24 days).
The month with the lowest number of rainy days is February (1 days).

Average daylight in May / Average sunshine in May - Chiang Rai, Thailand
  • Average daylight in May: 13.1h

The month with the longest days is June (Average daylight: 13.3h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in May: 7h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are June, July and August (Average sunshine: 5).

Average UV index in May - Chiang Rai, 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 7).