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

January's commencement in Bangkok, Thailand, is accompanied by an average high-temperature of a still tropical 32.5°C (90.5°F), diverging marginally from December's 31.7°C (89.1°F). January brings Bangkok a consistent average low-temperature of 22.6°C (72.7°F).

Heat index

January's average heat index is appraised at a scorching 41°C (105.8°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Rising body temperatures due to excess heat retention could signify impending heat disorders.

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 13mm (0.51") of precipitation. In Bangkok, during the entire year, the rain falls for 128 days and collects up to 1648mm (64.88") of precipitation.

Sea temperature

January is the month with the coldest seawater, with an average sea temperature of 26.7°C (80.1°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

The average length of the day in January 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, sunrise is at 06:45 and sunset at 18:17 +07.

Sunshine

In January, the average sunshine is 8.8h.

UV index

In January, the average daily maximum UV index is 10. A UV Index reading of 8 to 10 represents a very high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 10 during January translates into these guidelines:
Always stay safe. Unprotected skin and eyes can get damaged rapidly. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Broad-spectrum SPF 30+ sunscreen must be generously applied and reapplied every two hours or post any outdoor activity or swim. Note! Reflective surfaces like sand and water heighten the UV radiation levels.