January weather forecast
Bangkok, Thailand

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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

Weather in January

January in Bangkok, Thailand, ushers in the New Year with elevated temperatures. The robust daylight period of 11.4 hours combined with 8.8 hours of sunshine classify this period as part of the dry season. Notably, the city sees a low rate of rainfall, with only 13mm (0.51") precipitation spread across a mere one day, rendering this as the driest period of the year. Both locals and tourists enjoy outdoor activities as the climate stays relatively comfortable with an average sea temperature of 26.7°C (80.1°F). The month's close sees a subtle escalation in temperatures, hinting at the impending heat of February.

Temperature

January's average high-temperature stands at a still tropical 32.5°C (90.5°F), showing little deviation from December's 31.7°C (89.1°F). Throughout January, Bangkok records an average temperature of 22.6°C (72.7°F) at night.

Heat index

During January, the heat index is calculated to be a blisteringly hot 41°C (105.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in January in Bangkok is 68%.

Rainfall

In January, in Bangkok, Thailand, the rain falls for 1 days. Throughout January, 13mm (0.51") of precipitation is accumulated. In Bangkok, during the entire year, the rain falls for 128 days and collects up to 1648mm (64.88") of precipitation.

Sea temperature

With an average sea temperature of 26.7°C (80.1°F), January is the month with the coldest seawater in Bangkok.
Note: Water temperature ranging between 25°C (77°F) and 29°C (84.2°F) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

The average length of the day in January in Bangkok is 11h and 25min.
On the first day of January in Bangkok, sunrise is at 06:41 and sunset at 18:01. On the last day of the month, sunrise is at 06:45 and sunset at 18:17 +07.

Sunshine

The average sunshine in January in Bangkok is 8.8h.

UV index

In January, the average daily maximum UV index in Bangkok is 10. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 10 during January leads to these instructions:
Immediate care is essential; skin and eyes can be harmed in no time without it. 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. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. A sunscreen boasting a minimum SPF of 30 should be generously applied and reapplied even on cloudy days, post swim or outdoor exercise. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.
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Frequently asked questions

How hot is it in Bangkok in January?

An average high-temperature, in January, in Bangkok, is 32.5°C (90.5°F) and the average low-temperature is 22.6°C (72.7°F). In January, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 41°C (105.8°F).

What is the average humidity in January in Bangkok?

The average relative humidity in January in Bangkok is 68%.

How much does it rain in Bangkok in January?

In Bangkok, in January, it is raining for 1 days, with typically 13mm (0.51") of accumulated precipitation.

What is the month with the coldest sea water in Bangkok?

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

How warm is the water in January in Bangkok?

In January, the average sea 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?

The average day length in January in Bangkok is 11h and 25min.

When is the sunrise / sunset in January in Bangkok?

In January, on the first day of the month, sunrise is at 06:41 and sunset at 18:01. On the last day of the month, sunrise is at 06:45 and sunset at 18:17 +07.

How long on average sun shines in January in Bangkok?

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

What is the UV index intensity in January in Bangkok?

In Bangkok, the average daily maximum UV index in January is 10. A UV Index of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in January
Bangkok, Thailand

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).

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Average humidity in January
Bangkok, Thailand

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%).

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Average rainfall in January
Bangkok, Thailand

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).

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Average rainfall days in January
Bangkok, Thailand

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).
The months with the least rainy days are January and December (1 days).

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Average sea temperature in January
Bangkok, Thailand

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).

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Average daylight in January /
Average sunshine in January
Bangkok, Thailand

Average daylight in January / Average sunshine in January - Bangkok, Thailand
  • Average daylight in January: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).

  • Average sunshine in January: 8h and 5min

The month with the most sunshine is February (Average sunshine: 9h and 0min).
The months with the least sunshine are August and September (Average sunshine: 5h and 12min).

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Average UV index in January
Bangkok, Thailand

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

The 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).

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Bangkok, Thailand

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