Mount Lavinia Weather in December

Thinking of visiting Mount Lavinia in December? Expect very high temperatures reaching 31°C (88°F) during the day, dropping to 24°C (75°F) at night. Heavy showers are common during the rainy season.

Rainfall in Mount Lavinia in December

As part of the rainy season, Mount Lavinia sees around 10 days of rain in December, with an average of 191 mm (7.5 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.

Temperature in Mount Lavinia in December

Temperatures in Mount Lavinia in December top out at 31°C (88°F) and drop to 24°C (75°F) overnight. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in Mount Lavinia in December

With approximately 217 hours of sunshine, the days are filled with clear skies during the day. Rain typically falls in the afternoon or evening, keeping mornings and early parts of the day sunny.

Wind Speed in Mount Lavinia in December

Wind speeds average 1 m/s (2 knots) during December. At this speed, you'll experience mostly light air movement that's just barely noticeable. As an average, some days will be completely calm while others have gentle breezes you can feel on your skin.

Average water temperature in December

The water temperature is 27°C (81°F), which most people find very comfortable. A good month for swimming and water sports.

December in Mount Lavinia can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sri Lanka, check out our Mount Lavinia's climate page.

Mount Lavinia Temperature in December

Min Temperature 24°C (75°F)  

Max Temperature 31°C (88°F)  

Water Temperature 27°C (81°F) *  

Chance of Rain 33%  

Precipitation 191 mm (7.5 in)  

Rainy days 10 days  

Humidity 72% *  

Windspeed 1 m/s (2 knots) *  

Sunshine 217 hours *  

Percentage Sunshine *  

* Data from: Colombo, Sri Lanka (7 KM, 4 Miles).

Daily Historical Temperatures

45-year average (1976-2025)

Based on our historical records, temperatures in Mount Lavinia typically stay consistent throughout December, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in December

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Daily Historical Precipitation

45-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in December

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Mount Lavinia in December

Browse day-by-day weather records for Mount Lavinia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Mount Lavinia historical weather extremes in December

Based on weather observations in Mount Lavinia between 2000 and 2025, these are the recorded extremes during December.

• The warmest day in December was on December 11, 2021, with a maximum of 34°C (93°F).
• On December 20, 2014, Mount Lavinia saw its coldest December day with temperatures maxing out at 25°C (77°F).
• The coldest night in December in Mount Lavinia was on December 30, 2019, with a minimum of 12°C (54°F).

What to Wear in Mount Lavinia 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. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Mount Lavinia in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

8/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sri Lanka, check out our Mount Lavinia's climate page.

More climate data for Mount Lavinia

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Mount Lavinia climate overview or explore weather in Sri Lanka.