January weather forecast
Niwanthidiya, Sri Lanka

January in Niwanthidiya, Sri Lanka, is a hot winter month, with an average temperature ranging between min 23.3°C (73.9°F) and max 30.3°C (86.5°F).

Temperature

During January, Niwanthidiya records an average high-temperature of a tropical 30.3°C (86.5°F), marking a slight divergence from December's 29.7°C (85.5°F). In the month of January, the nighttime temperature dips to a steady average of 23.3°C (73.9°F).

Heat index

For most parts of January, the heat index is computed to be 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.
The heat index's values are generally associated with conditions in shade and light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

With an average relative humidity of 74%, January is the least humid month in Niwanthidiya, Sri Lanka.

Rainfall

The month with the least rainfall is January, when the rain falls for 11.2 days and typically collects 37mm (1.46") of precipitation.

Daylight

The average length of the day in January is 11h and 47min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:05. On the last day of January, in Niwanthidiya, Sri Lanka, sunrise is at 06:28 and sunset at 18:18 +0530.

Sunshine

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

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 during January translates into the following directions:
Deflect overexposure. Sun protection is a necessity. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.