January weather forecast
Gonahena, Sri Lanka

January in Gonahena, Sri Lanka, is a tropical winter month, with an average temperature varying between 23.1°C (73.6°F) and 30.8°C (87.4°F).

Temperature

With the start of January, Gonahena measures an average high-temperature of a hot 30.8°C (87.4°F), not significantly differing from December's 29.9°C (85.8°F). Throughout the month of January, the average temperature dips to a moderately hot 23.1°C (73.6°F) at night.

Heat index

Throughout January, the heat index is estimated at a very hot 38°C (100.4°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The months with the lowest humidity are January and February, with an average relative humidity of 74%.

Rainfall

The month with the least rainfall in Gonahena, Sri Lanka, is January, when the rain falls for 11.6 days and typically collects 40mm (1.57") of precipitation.

Daylight

In January, the average length of the day is 11h and 46min.
On the first day of January in Gonahena, sunrise is at 06:21 and sunset at 18:05. On the last day of the month, sunrise is at 06:28 and sunset at 18:18 +0530.

Sunshine

January has the most sunshine of the year in Gonahena, with an average of 9.1h 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 in Gonahena, Sri Lanka. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A maximum high daily UV index of 7 during January translates into the following directions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. 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. Enhance your sun protection with tightly woven, yet airy clothing.