January weather forecast
Bangkok, Thailand

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

Bangkok notes an average high-temperature of a still hot 32.5°C (90.5°F) in January, displaying minor variation from December. Bangkok's temperature tends to fall to an average low of 22.6°C (72.7°F) during the nights of January.

Heat index

During January, the heat index is estimated at a blisteringly hot 41°C (105.8°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

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

Rainfall

In January, the rain falls for 1 days. Throughout January, 13mm (0.51") of precipitation is accumulated. Throughout the year, there are 128 rainfall days, and 1648mm (64.88") of precipitation is accumulated.

Sea temperature

The month with the coldest seawater is January, with an average sea temperature of 26.7°C (80.1°F).
Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.

Daylight

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

Sunshine

In January, the average sunshine is 8.8h.

UV index

In Bangkok, the average daily maximum UV index in January is 10. A UV Index of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV radiation for average individuals.
Note: In January, the maximum UV index of 10 suggests these recommendations:
Swift harm can befall unprotected skin and eyes. Prioritize safety. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. After every outdoor workout or swim, liberally apply and frequently reapply a broad-spectrum SPF 30+ sunscreen. Be alert! The reflection of water and sand augments UV radiation intensity.