Mirissa Weather in December
Thinking of visiting Mirissa in December? Expect high temperatures reaching 30°C (86°F) during the day, dropping to 25°C (77°F) at night. Heavy showers are common during the rainy season.
Rainfall in Mirissa in December
Mirissa is in the rainy season in December, with rain on around 10 days and an average of 181 mm (7.1 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Mirissa in December
December in Mirissa brings typical temperatures with highs around 30°C (86°F) and lows of 25°C (77°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Mirissa in December
Expect sunny days throughout the month, with an estimated 220 hours of sunshine. Despite being the rainy season, it could still be a nice time to visit. Rain often arrives later in the day, keeping most of the days sunny.December in Mirissa has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sri Lanka, check out our Mirissa's climate page.
Mirissa Temperature in December
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Chance of Rain
32%
Precipitation
181 mm (7.1 in)
Rainy days
10 days
Sunshine
220 hours *
Percentage Sunshine
*
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Mirissa typically stay consistent throughout December, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in December
Daily Historical Precipitation
44-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Mirissa in December
Browse day-by-day weather records for Mirissa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mirissa historical weather extremes in December
Based on 20 years of weather observations in Mirissa between 2005 and 2025, these are the recorded extremes.
- On December 5, 2020, temperatures climbed to 34°C (93°F), marking the warmest December day on record.
- The coldest December day was on December 25, 2014, with a maximum of 25°C (77°F).
- Mirissa registered its coldest December night on December 11, 2021, with temperatures dropping to 10°C (50°F).
Best Places in Sri Lanka in December
Find out more about the weather in Sri Lanka and which places have the best travel conditions in this month. See all of Sri Lanka in December →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Mirissa in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Mirissa in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sri Lanka, check out our Mirissa's climate page.
See the full Mirissa climate overview or explore weather in Sri Lanka.
