January weather forecast and climate
Bangkok, Thailand

A beautiful park outside the Wat Ratchanatdaram Temple in the heart of Bangkok, Thailand
A beautiful park outside the Wat Ratchanatdaram Temple in the heart of Bangkok, Thailand
January, the same as December, in Bangkok, Thailand, is another tropical winter month, with average temperature varying between 32.5°C (90.5°F) and 22.6°C (72.7°F).
The ideal sea water temperature of 26.7°C (80.1°F) and only 1 rainfall days, with 13.3mm (0.52") of accumulated rainfall, makes January the best time for swimming and other water activities.

Temperature

In January, the average high-temperature is almost the same as in December - a still hot 32.5°C (90.5°F). The average low-temperature, in January, is 22.6°C (72.7°F).

Heat index

The average heat index is calculated to a scorching 41.1°C (106°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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, differences in body mass, height, and shape). 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. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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

In January, the average relative humidity is 68%.

Rainfall

In Bangkok, during January, the rain falls for 1 days and regularly aggregates up to 13.3mm (0.52") of precipitation. Throughout the year, in Bangkok, there are 128 rainfall days, and 1648.2mm (64.89") of precipitation is accumulated.

Sea temperature

January is the month with the coldest seawater, with an average sea temperature of 26.7°C (80.1°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

The average length of the day in January is 11.4h.

Sunshine

In Bangkok, the average sunshine in January is 8.8h.

UV index

In January, the average daily maximum UV index is 10. A UV Index value of 8 to 10 symbolizes a very high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 10 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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. 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. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in January in Bangkok?

In January, in Bangkok, the average high-temperature is 32.5°C (90.5°F), and the average low-temperature is 22.6°C (72.7°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines air temperature and relative humidity, in January is evaluated at 41.1°C (106°F).

What is the average humidity in January in Bangkok?

In Bangkok, the average relative humidity in January is 68%.

How much does it rain in Bangkok in January?

In Bangkok, Thailand, during January, the rain falls for 1 days and regularly aggregates up to 13.3mm (0.52") of precipitation.

What month is the sea coldest in Bangkok?

The month with the coldest seawater is January, with an average sea temperature of 26.7°C (80.1°F).

What is the water temperature in January in Bangkok?

In Bangkok, in January, the average water temperature is 26.7°C (80.1°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 average length of the day in January in Bangkok?

In Bangkok, Thailand, the average length of the day in January is 11.4h.

How many hours of sunshine does Bangkok have in January?

In January, the average sunshine in Bangkok, Thailand, is 8.8h.

What is the UV index intensity in January in Bangkok?

In Bangkok, Thailand, the average daily maximum UV index in January is 10. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays.
Average temperature in January - Bangkok, Thailand
  • Average high temperature in January: 32.5°C

The warmest month (with the highest average high temperature) is April (35.4°C).
The month with the lowest average high temperature is December (31.7°C).

  • Average low temperature in January: 22.6°C

The month with the highest average low temperature is April (26.9°C).
The coldest month (with the lowest average low temperature) is December (22°C).

Average humidity in January - Bangkok, Thailand
  • Average humidity in January: 68%

The month with the highest relative humidity is September (79%).
The month with the lowest relative humidity is December (66%).

Average rainfall in January - Bangkok, Thailand
  • Average rainfall in January: 13.3mm

The wettest month (with the highest rainfall) is September (334.3mm).
The driest month (with the least rainfall) is December (6.3mm).

Average rainfall days in January - Bangkok, Thailand
  • Average rainfall days in January: 1 days

The month with the highest number of rainy days is September (21 days).
Months with the least rainy days are January and December (1 days).

Average sea temperature in January - Bangkok, Thailand
  • Average sea temperature in January: 26.7°C

The best month for swimming (with the highest average sea temperature) is May (29.9°C).
The coldest month (with the lowest average sea temperature) is January (26.7°C).

Average daylight in January / Average sunshine in January - Bangkok, Thailand
  • Average daylight in January: 11.4h

The month with the longest days is June (Average daylight: 12.9h).
The month with the shortest days is December (Average daylight: 11.3h).

  • Average sunshine in January: 8.8h

The month with the most sunshine is February (Average sunshine: 9h).
Months with the least sunshine are August and September (Average sunshine: 5.2).

Average UV index in January - Bangkok, Thailand
  • Average UV index in January: 10

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).