Climate averages 1991–2020
Trincomalee weather
in December.
A warm, very wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Trincomalee: daytime highs average 27.1°C and nights cool to about 24.3°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 276 mm of rain on roughly 21 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 38 min on an average December day.
The nearest other city in this atlas is Batticaloa (109 km away). In December its highs average 27.3°C, about as warm as Trincomalee, with 302 mm of rain.
Among the 12 cities listed in Sri Lanka, Trincomalee ranks 9th of 12 for the warmest December highs and 10th of 12 for the driest December (rainfall, lowest first). The mean December high of those 12 cities is 27.8°C; Trincomalee is 0.7°C cooler than that mean.
From December to January, average highs fall by 0.2°C to 26.9°C, and monthly rainfall falls from 276 mm to 126 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Trincomalee climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.9°C24.1°C | 24.1°C | 126 | 14.5 | 11.712 h |
| February | 27.9°C24.4°C | 24.4°C | 74 | 9.6 | 11.812 h |
| March | 30.0°C25.1°C | 25.1°C | 40 | 7.1 | 12.112 h |
| April | 31.7°C26.2°C | 26.2°C | 56 | 10.1 | 12.312 h |
| May | 33.5°C26.7°C | 26.7°C | 48 | 8.1 | 12.513 h |
| June | 33.8°C26.6°C | 26.6°C | 18 | 3.1 | 12.613 h |
| July | 33.6°C26.3°C | 26.3°C | 31 | 5.5 | 12.613 h |
| August | 33.3°C26.0°C | 26.0°C | 45 | 7.8 | 12.412 h |
| September | 33.0°C25.8°C | 25.8°C | 65 | 10.7 | 12.212 h |
| October | 30.7°C25.2°C | 25.2°C | 186 | 18.6 | 11.912 h |
| November | 28.1°C24.5°C | 24.5°C | 301 | 24.1 | 11.712 h |
| December, selected | 27.1°C24.3°C | 24.3°C | 276 | 20.9 | 11.612 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Batticaloa in DecemberSri Lanka · 109 kmHigh 27.3°C · Low 23.5°C · 302 mm rain
- Kalmunai in DecemberSri Lanka · 146 kmHigh 27.2°C · Low 24.2°C · 310 mm rain
- Kandy in DecemberSri Lanka · 157 kmHigh 25.5°C · Low 19.8°C · 214 mm rain
- Point Pedro in DecemberSri Lanka · 176 kmHigh 27.0°C · Low 24.5°C · 191 mm rain
- Jaffna in DecemberSri Lanka · 181 kmHigh 26.8°C · Low 24.7°C · 199 mm rain
- Negombo in DecemberSri Lanka · 216 kmHigh 29.1°C · Low 23.5°C · 137 mm rain
- Colombo in DecemberSri Lanka · 238 kmHigh 29.2°C · Low 23.2°C · 164 mm rain
- Dehiwala-Mount Lavinia in DecemberSri Lanka · 244 kmHigh 29.0°C · Low 23.3°C · 174 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Trincomalee) is explained once on the Trincomalee year overview and on the Sources, method and limits page.