December weather forecastSeethagama, Sri Lanka

Weather in December

The first month of the winter, December, is still a warm month in Seethagama, Sri Lanka, with an average temperature fluctuating between 29.9°C (85.8°F) and 23.7°C (74.7°F).

Temperature

Entering December, Seethagama's average high-temperature reads a moderately hot 29.9°C (85.8°F), indicating a close resemblance to the previous month's climate. During the month of December, Seethagama anticipates a mean low-temperature of 23.7°C (74.7°F).

Heat index

December's heat index is estimated at a sweltering 37°C (98.6°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in December in Seethagama is 79%.

Rainfall

In Seethagama, in December, during 21.1 rainfall days, 148mm (5.83") of precipitation is typically accumulated. In Seethagama, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

December has the shortest days of the year in Seethagama, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:05 and sunset at 17:50. On the last day of December, sunrise is at 06:20 and sunset at 18:04 +0530.

Sunshine

In Seethagama, Sri Lanka, the average sunshine in December is 6.9h.

UV index

The months with the highest UV index in Seethagama are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 7 in December translates into this advice:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.