October weather forecast
Mirissa, Sri Lanka

October brings more fluctuations in temperature and rainfall. The end of the high UV index readings coincides with the tapering daylight hours. Sea temperatures keep their unchanging course, complementing the ongoing conditions. Even so, October stands out with rainfall escalating to 305mm (12.01") over 13 days, marking the most precipitous phase in the timeline.

Temperature

Temperatures reach their minimum during August through October and December, recording an average high-temperature of 29°C (84.2°F).

Rainfall

The month with the most rainfall in Mirissa, Sri Lanka, is October, when the rain falls for 13 days and typically aggregates up to 305mm (12.01") of precipitation.

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 activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

The average length of the day in October in Mirissa, Sri Lanka, is 11h and 59min.
On the first day of October in Mirissa, Sri Lanka, sunrise is at 05:55 and sunset at 17:59. On the last day of the month, sunrise is at 05:54 and sunset at 17:49 +0530.

Sunshine

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

UV index

The months with the highest UV index are January through October, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 12 during October translates into the following directions:
Enforce every vital precaution. Those with light skin could endure burns in a matter of minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Alert! Sand and water increase UV exposure due to their reflective properties.