May weather forecast
Chiang Rai, Thailand

The White Temple of Wat Rong Khun with a waterfront fishpond in Chiang Rai, Thailand
The White Temple of Wat Rong Khun with a waterfront fishpond in Chiang Rai, Thailand

Weather in May

May, the last month of the spring in Chiang Rai, is also a hot month, with temperature in the range of an average low of 22.5°C (72.5°F) and an average high of 33.1°C (91.6°F).

Temperature

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

Heat index

In May, the average heat index is appraised at a life-threatening hot 47°C (116.6°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 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, wind). 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. 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. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 76%.

Rainfall

In May, in Chiang Rai, the rain falls for 17 days. Throughout May, 213mm (8.39") of precipitation is accumulated. In Chiang Rai, during the entire year, the rain falls for 137 days and collects up to 1691mm (66.57") of precipitation.

Daylight

In May, the average length of the day is 13h and 5min.
On the first day of May, sunrise is at 05:51 and sunset at 18:43. On the last day of the month, sunrise is at 05:40 and sunset at 18:55 +07.

Sunshine

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

UV index

The months with the highest UV index in Chiang Rai, Thailand, are March through September, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 12 translate into the following recommendations:
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. 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.
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FAQ

What is the temperature in May in Chiang Rai?

The average high-temperature, in May, 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. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in May is appraised at 47°C (116.6°F).

What is the average humidity in May in Chiang Rai?

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

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

In May, the rain falls for 17 days. Throughout May, 213mm (8.39") of precipitation is accumulated.

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

The average day length in May in Chiang Rai is 13h and 5min.

What time are sunrise and sunset in May in Chiang Rai?

In May, on the first day of the month, sunrise is at 05:51 and sunset at 18:43. On the last day of the month, sunrise is at 05:40 and sunset at 18:55 +07.

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

The average sunshine duration in May is 7h.

What are the months with the highest UV index in Chiang Rai?

March through September, with an average maximum UV index of 12, are months with the highest UV index in Chiang Rai.

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

In May, the average daily maximum UV index in Chiang Rai, Thailand, is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average UV index

Average temperature in May
Chiang Rai, Thailand

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).

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Average humidity in May
Chiang Rai, Thailand

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%).

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Average rainfall in May
Chiang Rai, Thailand

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 least rainfall) is January (7.5mm).

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Average rainfall days in May
Chiang Rai, Thailand

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 least rainy days is February (1 days).

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Average daylight in May /
Average sunshine in May
Chiang Rai, Thailand

Average daylight in May / Average sunshine in May - Chiang Rai, Thailand
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 13h and 19min).
The month with the shortest days is December (Average daylight: 10h and 57min).

  • Average sunshine in May: 7h

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

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Average UV index in May
Chiang Rai, Thailand

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

The 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).

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