April weather forecast
Chiang Rai, Thailand

April brings an even hotter environment to Chiang Rai, with a considerable increase in rainfall compared to the previous months. The precipitation rate noted is significant at 98mm (3.86"). With an increased UV index, sun protection becomes a priority for anyone spending ample time outdoors. Even with these weather shifts, the exotic locale of Chiang Rai manages to enthral its visitors. A blend of sunny and rainy spells makes Chiang Rai unpredictable and appealing during April.

Temperature

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

Heat index

Throughout April, the heat index is appraised at a life-threatening hot 47°C (116.6°F). Guard: Heat exhaustion and heat cramps are foreseeable. Prolonged effort may bring about heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. 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 the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In Chiang Rai, the average relative humidity in April is 66%.

Rainfall

In Chiang Rai, in April, it is raining for 10 days, with typically 98mm (3.86") of accumulated precipitation. Throughout the year, there are 137 rainfall days, and 1691mm (66.57") of precipitation is accumulated.

Daylight

The average length of the day in April in Chiang Rai is 12h and 36min.
On the first day of April, sunrise is at 06:13 and sunset at 18:34. On the last day of the month, sunrise is at 05:51 and sunset at 18:43 +07.

Sunshine

In April, the average sunshine is 8h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an extreme threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 12 in April translates into this advice:
Adopt every precaution of necessity, unprotected skin and eyes may suffer burns instantly. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity.