December weather forecast
Chiang Rai, Thailand

December witnesses the onset of the cool season in Chiang Rai with temperatures ranging from 13.5°C (56.3°F) and 27.2°C (81°F). The month marks a significant reduction in rainfall, to an annual low of 14mm (0.55"). The city resonates with festive spirit against the backdrop of perfect weather. Long sunny days combined with cool and pleasant nights make this month an ideal time for sightseeing and exploring the city. The mild and comfortable climate of December in Chiang Rai makes it an attractive destination during the holiday season.

Temperature

Chiang Rai's December weather, with an average high temperature of 27.2°C (81°F) and an average low temperature of 13.5°C (56.3°F), tends to be the coldest of the year.

Heat index

December's average heat index is appraised at a hot 30°C (86°F). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. 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 hold particular significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.

Humidity

In Chiang Rai, the average relative humidity in December is 77%.

Rainfall

In December, the rain falls for 3 days. Throughout December, 14mm (0.55") 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

The month with the shortest days is December, with an average of 11h and 0min of daylight.
On the first day of December, sunrise is at 06:39 and sunset at 17:40. On the last day of the month, sunrise is at 06:55 and sunset at 17:52 +07.

Sunshine

The average sunshine in December is 7h.

UV index

The month with the lowest UV index in Chiang Rai is December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 7 translates into these guidelines:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.