January weather forecast
Bentota, Sri Lanka

January sees Bentota, Sri Lanka kick-start the year with temperatures slightly lower than its peak, offering a more relaxed environment for sightseeing and other outdoor activities. The climate shows a pattern of stable weather with less rainfall making it pleasant for tourists. Despite the decrease from its summertime highs, the sea temperature still remains conducive for a swim at 27.9°C (82.2°F). The month is characterized by minimal rainfall and an increased number of sunshine hours, offering ample opportunity for visitors to explore this beautiful city. The relatively low humidity relative to the sea temperature also creates a comfortable environment for outdoor activities during the day.

Temperature

The transition from December to January in Bentota, Sri Lanka, sees average high-temperatures adjusting to a tropical 30.3°C (86.5°F), from a not significantly different 29.7°C (85.5°F). In January, the average low-temperature records at a moderately hot 23.4°C (74.1°F) during the nights.

Heat index

In January, the average heat index is estimated at a fiery hot 37°C (98.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

January and February, with an average relative humidity of 75%, are the least humid months.

Rainfall

January is the month with the least rainfall. Rain falls for 8.9 days and accumulates 25mm (0.98") of precipitation.

Sea temperature

In Bentota, Sri Lanka, in January, the average water temperature is 27.9°C (82.2°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

In January, the average length of the day in Bentota is 11h and 48min.
On the first day of the month, sunrise is at 06:20 and sunset at 18:05. On the last day of January, sunrise is at 06:27 and sunset at 18:18 +0530.

Sunshine

The month with the most sunshine in Bentota is January, with an average of 9.2h of sunshine.

UV index

The months with the highest UV index are January through April, July, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily maximum UV index of 7 in January translates into the following instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be mindful! Sand and water reflections can up the Sun's UV exposure.