December weather forecast
Mirissa, Sri Lanka

December concludes the yearly weather cycle with a slight dip in temperature highs. The downward trend in daylight hours subsides at last, consistent with the preceding month. Sea temperatures follow suit with the recent slight uplift. The UV index drops to 11, indicating a considerable decrease in sunlight intensity. Furthermore, rainfall reduces to a monthly total of 171mm (6.73") over 10 days, bringing the year's weather journey to a close.

Temperature

Mirissa's lowest temperatures tend to occur in August through October and December, with an average high-temperature of 29°C (84.2°F).

Rainfall

In Mirissa, in December, during 10 rainfall days, 171mm (6.73") of precipitation is typically accumulated. Throughout the year, there are 116 rainfall days, and 2216mm (87.24") of precipitation is accumulated.

Sea temperature

January, February, June through October and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.
Note: For swimming, diving, and various water activities, the temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as highly enjoyable and comfortable for extended durations without any discomfort.

Daylight

The month with the shortest days is December, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 06:03 and sunset at 17:51. On the last day of December, in Mirissa, Sri Lanka, sunrise is at 06:17 and sunset at 18:04 +0530.

Sunshine

The months with the least sunshine are May through December, with an average of 6h of sunshine.

UV index

November and December, with an average maximum UV index of 11, are months with the lowest UV index. A UV Index value of 11, and more, symbolizes an excessive health risk from unsafe exposure to UV radiation for the ordinary person.
Note: An average maximum UV index of 11 in December leads to these recommendations:
Employ every crucial safety step. Those with fair skin could experience burns in a matter of minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Sunscreen with a sun protection factor of no less than 30 should be used liberally and reapplied frequently on overcast days, including after every swim or outdoor activity. Be on guard! The reflective nature of sand and water boosts UV exposure.