January weather forecast and climate
Phuket, Thailand

A close view of beautiful long tail boats on the white sandy shores of a beach in Phuket, Thailand
A close view of beautiful long tail boats on the white sandy shores of a beach in Phuket, Thailand
January, like December, is another hot winter month in Phuket, Thailand, with temperature in the range of an average high of 32.7°C (90.9°F) and an average low of 24.5°C (76.1°F).
The perfect water temperature of 28°C (82.4°F) with 30.3mm (1.19") of accumulated rainfall and only 4 rainfall days, makes January a great period for swimming and other water activities.

Temperature

In Phuket, the average high-temperature is relatively the same as in December - a still tropical 32.7°C (90.9°F). The average low-temperature, in January, is 24.5°C (76.1°F).

Heat index

The average heat index in January is estimated at an extremely hot 42.5°C (108.5°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. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like metabolic differences, pregnancy, differences in body mass, height, and shape, and activity influence one's weather impression. 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 particularly important for children. 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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

The average relative humidity in Phuket is 70%.

Rainfall

In January, in Phuket, the rain falls for 4 days. Throughout January, 30.3mm (1.19") of precipitation is accumulated. In Phuket, during the entire year, the rain falls for 170 days and collects up to 2219.5mm (87.38") of precipitation.

Sea temperature

Months with the coldest seawater in Phuket are January, February and December, with an average sea temperature of 28°C (82.4°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

January and December, with an average of 11.7h of daylight, are months with the shortest days in Phuket.

Sunshine

In January, the average sunshine in Phuket is 9.2h.

UV index

In January, the average daily maximum UV index in Phuket is 11. A UV Index estimate of 11, and higher, represents an extreme health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 11 in January transform into the following instructions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in January in Phuket?

In Phuket, in January, the average high-temperature is 32.7°C (90.9°F), and the average low-temperature is 24.5°C (76.1°F). In January, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines relative humidity and air temperature, is appraised at 42.5°C (108.5°F).

What is the average humidity in January in Phuket?

In January, the average relative humidity in Phuket is 70%.

How many days does it rain in January in Phuket?

In Phuket, Thailand, in January, it is raining for 4 days, with typically 30.3mm (1.19") of accumulated precipitation.

When is the sea coldest in Phuket?

January, February and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.

What is the water temperature in January in Phuket?

In Phuket, in January, the average water temperature is 28°C (82.4°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Phuket?

Months with the shortest days are January and December, with an average of 11.7h of daylight.

What is the average length of the day in January in Phuket?

The average length of the day in January is 11.7h.

How many hours of sunshine does Phuket have in January?

In Phuket, the average sunshine in January is 9.2h.

What is the UV index intensity in January in Phuket?

In Phuket, the average daily maximum UV index in January is 11. A UV Index reading of 11, and higher, represents an ultimate hazard to health from unprotected exposure to the UV radiation.
Average temperature in January - Phuket, Thailand
  • Average high temperature in January: 32.7°C

The warmest month (with the highest average high temperature) is March (34°C).
Months with the lowest average high temperature are September and October (31.5°C).

  • Average low temperature in January: 24.5°C

The month with the highest average low temperature is April (25.8°C).
The coldest month (with the lowest average low temperature) is December (24.4°C).

Average humidity in January - Phuket, Thailand
  • Average humidity in January: 70%

Months with the highest relative humidity are September and October (82%).
The month with the lowest relative humidity is February (69%).

Average rainfall in January - Phuket, Thailand
  • Average rainfall in January: 30.3mm

The wettest month (with the highest rainfall) is September (361.2mm).
The driest month (with the least rainfall) is February (23.9mm).

Average rainfall days in January - Phuket, Thailand
  • Average rainfall days in January: 4 days

The month with the highest number of rainy days is September (23 days).
The month with the least rainy days is February (3 days).

Average sea temperature in January - Phuket, Thailand
  • Average sea temperature in January: 28°C

The best months for swimming (with the highest average sea temperature) are April, May and June (30°C).
The coldest months (with the lowest average sea temperature) are January, February and December (28°C).

Average daylight in January / Average sunshine in January - Phuket, Thailand
  • Average daylight in January: 11.7h

The month with the longest days is June (Average daylight: 12.6h).
Months with the shortest days are January and December (Average daylight: 11.7h).

  • Average sunshine in January: 9.2h

The month with the most sunshine is February (Average sunshine: 9.7h).
The month with the least sunshine is June (Average sunshine: 4.7h).

Average UV index in January - Phuket, Thailand
  • Average UV index in January: 11

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).