January weather forecast
Naiduwa, Sri Lanka

January, the same as December, is a moderately hot winter month in Naiduwa, Sri Lanka, with an average temperature ranging between min 24°C (75.2°F) and max 29.2°C (84.6°F).

Temperature

The transition into January is marked with an average high-temperature of a still moderately hot 29.2°C (84.6°F), showing an insignificant shift from December's 28.9°C (84°F). Naiduwa's temperature tends to fall to an average low of 24°C (75.2°F) during the nights of January.

Heat index

The heat index value for January is evaluated at a very hot 35°C (95°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', arises from combining readings of air temperature and relative moisture content. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Naiduwa, the average relative humidity in January is 78%.

Rainfall

The month with the least rainfall is January, when the rain falls for 14.8 days and typically collects 38mm (1.5") of precipitation.

Daylight

The average length of the day in January 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, in Naiduwa, sunrise is at 06:27 and sunset at 18:18 +0530.

Sunshine

In January, the average sunshine is 9h.

UV index

January through April, June through August, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 in January converts into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.