April 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 April

April, the same as March, in Chiang Rai, Thailand, is a hot spring month, with an average temperature ranging between max 34.8°C (94.6°F) and min 20.6°C (69.1°F).

Temperature

April is the warmest month, with an average high-temperature of 34.8°C (94.6°F) and an average low-temperature of 20.6°C (69.1°F).

Heat index

In April, the average heat index is appraised at a burning hot 47°C (116.6°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
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', 'felt air temperature', 'apparent temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, pregnancy, wind, and metabolic differences affect individual temperature impact. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through 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 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 Rai, the average relative humidity in April is 66%.

Rainfall

In April, the rain falls for 10 days. Throughout April, 98mm (3.86") 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 April, the average length of the day is 12h and 36min.
On the first day of April in Chiang Rai, sunrise is at 06:14 and sunset at 18:34. On the last day of the month, sunrise is at 05:52 and sunset at 18:43 +07.

Sunshine

In April, the average sunshine is 8h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme health hazard from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 12 in April 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 warmest month in Chiang Rai?

April is the warmest month in Chiang Rai, Thailand, with an average high-temperature of 34.8°C (94.6°F) and an average low-temperature of 20.6°C (69.1°F).

What is the temperature in April in Chiang Rai?

The average high-temperature, in April, is 34.8°C (94.6°F), while the average low-temperature is 20.6°C (69.1°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in April is appraised at 47°C (116.6°F).

What is the average humidity in April in Chiang Rai?

In April, the average relative humidity is 66%.

How much does it rain in Chiang Rai in April?

In April, the rain falls for 10 days. Throughout April, 98mm (3.86") of precipitation is accumulated.

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

In April, the average day length in Chiang Rai, Thailand, is 12h and 36min.

When are sunrise and sunset in April in Chiang Rai?

In April, on the first day of the month, sunrise is at 06:14 and sunset at 18:34. On the last day of the month, in Chiang Rai, sunrise is at 05:52 and sunset at 18:43 +07.

How long on average sun shines in April in Chiang Rai?

The average sunshine duration in April in Chiang Rai is 8h.

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, Thailand.

How high is the UV index in April in Chiang Rai?

In Chiang Rai, the average daily maximum UV index in April is 12. A UV Index estimate of 11, and higher, represents an ultimate hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average UV index

Average temperature in April
Chiang Rai, Thailand

Average temperature in April - Chiang Rai, Thailand
  • Average high temperature in April: 34.8°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 April: 20.6°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 April
Chiang Rai, Thailand

Average humidity in April - Chiang Rai, Thailand
  • Average humidity in April: 66%

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 April
Chiang Rai, Thailand

Average rainfall in April - Chiang Rai, Thailand
  • Average rainfall in April: 97.9mm

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 April
Chiang Rai, Thailand

Average rainfall days in April - Chiang Rai, Thailand
  • Average rainfall days in April: 10 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 April /
Average sunshine in April
Chiang Rai, Thailand

Average daylight in April / Average sunshine in April - Chiang Rai, Thailand
  • Average daylight in April: 12h and 36min

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 April: 8h

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 April
Chiang Rai, Thailand

Average UV index in April - Chiang Rai, Thailand
  • Average UV index in April: 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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