January weather forecast
Potuwila, Sri Lanka

January in Potuwila, Sri Lanka, is a hot winter month, with an average temperature fluctuating between 23.4°C (74.1°F) and 30.3°C (86.5°F).

Temperature

The advent of January observes an average high-temperature of a hot 30.3°C (86.5°F), nearly identical to December's 29.7°C (85.5°F). The nighttime temperature, during January, averages of 23.4°C (74.1°F).

Heat index

In January, the heat index is evaluated at a fiery hot 37°C (98.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. 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', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

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

Rainfall

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

Daylight

In January, the average length of the day is 11h and 47min.
On the first day of January in Potuwila, sunrise is at 06:20 and sunset at 18:05. On the last day of the month, sunrise is at 06:27 and sunset at 18:18 +0530.

Sunshine

January has the most sunshine of the year in Potuwila, with an average of 9.2h of sunshine.

UV index

The months with the highest UV index in Potuwila are January through April, July, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In January, the maximum UV index of 7 transforms into these recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.