January weather forecast
Kahathuduwa, Sri Lanka

January is a tropical winter month in Kahathuduwa, Sri Lanka, with temperature in the range of an average low of 23.4°C (74.1°F) and an average high of 30.3°C (86.5°F).

Temperature

Transitioning from December to January, Kahathuduwa observes an average high-temperature of a hot 30.3°C (86.5°F), differing subtly from the previous month. Throughout the month of January, the nighttime temperature dips to an average of 23.4°C (74.1°F).

Heat index

January's mean heat index is calculated to be a very hot 37°C (98.6°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

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

Rainfall

The month with the least rainfall in Kahathuduwa, Sri Lanka, is January, when the rain falls for 8.9 days and typically collects 25mm (0.98") of precipitation.

Daylight

In Kahathuduwa, the average length of the day in January is 11h and 47min.
On the first day of January, 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

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

UV index

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index in Kahathuduwa. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 during January leads to these advisories:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.