January weather forecast
Negombo, Sri Lanka

January in Negombo, Sri Lanka, features warm temperatures that create a pleasant atmosphere. Although it is colder than the following month, it still brings about favorable conditions for outdoor activities. It has a stable sea temperature, ideal for beach activities. January has the lowest rainfall of the year, with an average of 29mm (1.14"), which is significantly less than the subsequent month. With mostly clear skies, it is a suitable time for vacationing and exploring the city's rich culture and heritage.

Temperature

Negombo marks the start of January with an average high-temperature of a tropical 30.8°C (87.4°F), hinting at a slight fluctuation from December's 29.9°C (85.8°F). Nighttime temperatures in Negombo hover around an average low of 22.8°C (73°F) in January.

Heat index

The heat index in January is computed to be a fiery hot 38°C (100.4°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

January and February, with an average relative humidity of 73%, are the least humid months.

Rainfall

January is the month with the least rainfall in Negombo. Rain falls for 9.7 days and accumulates 29mm (1.14") of precipitation.

Sea temperature

In Negombo, in January, the average water temperature is 27.6°C (81.7°F).
Note: For any water activity, the surface water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are deemed excellent and incredibly pleasant for longer durations.

Daylight

The average length of the day in January in Negombo, Sri Lanka, is 11h and 46min.
On the first day of January, sunrise is at 06:22 and sunset at 18:05. On the last day of the month, sunrise is at 06:29 and sunset at 18:18 +0530.

Sunshine

January through April, with an average of 9.2h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index in Negombo are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 during January translates into the following guidance:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflections of sand and water make the Sun's UV rays stronger.