December weather forecast
Kahathuduwa, Sri Lanka

December, the first month of the winter in Kahathuduwa, is still a warm month, with an average temperature ranging between max 29.7°C (85.5°F) and min 24.4°C (75.9°F).

Temperature

December records an average high-temperature of a still moderately hot 29.7°C (85.5°F), indicating a minor variation from the preceding month. During December, Kahathuduwa consistently records a temperature low averaging a still moderately hot 24.4°C (75.9°F).

Heat index

Throughout December, the heat index is calculated to be a very hot 36°C (96.8°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In December, the average relative humidity in Kahathuduwa is 79%.

Rainfall

In Kahathuduwa, during December, the rain falls for 16.5 days and regularly aggregates up to 93mm (3.66") of precipitation. In Kahathuduwa, during the entire year, the rain falls for 273.8 days and collects up to 2059mm (81.06") of precipitation.

Daylight

The month with the shortest days in Kahathuduwa is December, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:06 and sunset at 17:51. On the last day of December, in Kahathuduwa, sunrise is at 06:20 and sunset at 18:05 +0530.

Sunshine

In December, the average sunshine is 7.1h.

UV index

January through April, July, September 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 unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 7 in December leads to these guidelines:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.