Trincomalee weather in December
In December, Trincomalee sees average daytime highs of 27°C and overnight lows near 25°C, with 277 mm of rain across 20.9 wet days and about 11.5 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels oppressive.
Daylight stretches from about 11 h 30 min at the start of December to 11 h 30 min by month's end. Set against the rest of the year, December is Trincomalee's 6th-clearest and 7th-windiest month. For the whole year in context, see Trincomalee's year-round climate.
- Daytime high
- 27°
- 11th warmest
- Overnight low
- 25°
- 3rd coldest
- Rainfall
- 277 mm
- 20.9 wet days
- Daylight
- 11 h 30 min
- 6:16 AM – 5:46 PM
- Cloud cover
- 71%
- 6th clearest
- Wind
- 16 km/h
- 7th windiest
- Solar energy
- 4.16 kWh/m²
- Travel score
- 4.7
- out of 10
Trincomalee is city in Sri Lanka.
- Density
- 14,456/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 27°C through the month.
A typical December day in Trincomalee reaches about 27°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 25 |
| 2 | 28 | 25 |
| 3 | 28 | 25 |
| 4 | 28 | 25 |
| 5 | 28 | 25 |
| 6 | 28 | 25 |
| 7 | 28 | 25 |
| 8 | 28 | 25 |
| 9 | 27 | 25 |
| 10 | 27 | 25 |
| 11 | 27 | 25 |
| 12 | 27 | 25 |
| 13 | 27 | 25 |
| 14 | 27 | 25 |
| 15 | 27 | 25 |
| 16 | 27 | 25 |
| 17 | 27 | 25 |
| 18 | 27 | 25 |
| 19 | 27 | 25 |
| 20 | 27 | 25 |
| 21 | 27 | 25 |
| 22 | 27 | 25 |
| 23 | 27 | 25 |
| 24 | 27 | 25 |
| 25 | 27 | 25 |
| 26 | 27 | 25 |
| 27 | 27 | 25 |
| 28 | 27 | 25 |
| 29 | 27 | 25 |
| 30 | 27 | 25 |
| 31 | 27 | 25 |
How December really feels in Trincomalee
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Trincomalee weather by month
How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 25° | 126 | 14.5 | 11.6 | 5.8 |
| Feb | 28° / 25° | 73 | 9.7 | 11.7 | 6.3 |
| Mar | 29° / 25° | 40 | 7.2 | 11.9 | 5.8 |
| Apr | 31° / 26° | 56 | 10 | 12.2 | 4.4 |
| May | 33° / 27° | 48 | 8.2 | 12.4 | 3.6 |
| Jun | 33° / 27° | 18 | 3.2 | 12.5 | 3.6 |
| Jul | 33° / 27° | 31 | 5.5 | 12.4 | 3.6 |
| Aug | 33° / 27° | 45 | 7.8 | 12.3 | 3.6 |
| Sep | 33° / 26° | 65 | 10.7 | 12.1 | 3.5 |
| Oct | 31° / 26° | 186 | 18.5 | 11.8 | 3.6 |
| Nov | 28° / 25° | 300 | 24.1 | 11.6 | 3.9 |
| Dec | 27° / 25° | 277 | 20.9 | 11.5 | 4.7 |
Cloud cover in December
The sky is clear or mostly clear about 16% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 65%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 34 | 34 | 35 | 35 | 37 | 37 | 38 | 39 | 40 | 40 | 43 | 43 | 43 | 44 | 44 | 44 |
| Cloudier (%) | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 66 | 66 | 65 | 65 | 63 | 63 | 62 | 61 | 60 | 60 | 57 | 57 | 57 | 56 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 31 | 69 |
| 2 | 31 | 69 |
| 3 | 31 | 69 |
| 4 | 31 | 69 |
| 5 | 31 | 69 |
| 6 | 31 | 69 |
| 7 | 32 | 68 |
| 8 | 31 | 69 |
| 9 | 31 | 69 |
| 10 | 31 | 69 |
| 11 | 31 | 69 |
| 12 | 31 | 69 |
| 13 | 32 | 68 |
| 14 | 32 | 68 |
| 15 | 32 | 68 |
| 16 | 34 | 66 |
| 17 | 34 | 66 |
| 18 | 35 | 65 |
| 19 | 35 | 65 |
| 20 | 37 | 63 |
| 21 | 37 | 63 |
| 22 | 38 | 62 |
| 23 | 39 | 61 |
| 24 | 40 | 60 |
| 25 | 40 | 60 |
| 26 | 43 | 57 |
| 27 | 43 | 57 |
| 28 | 43 | 57 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
| 31 | 44 | 56 |
Chance of precipitation in December
Trincomalee gets around 277 mm of rain over 20.9 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 68% and peaks near 73% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 73 | 72 | 70 | 69 | 69 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 70 | 70 | 70 | 71 | 71 | 70 | 70 | 70 | 69 | 68 | 67 | 65 | 64 | 63 | 61 | 60 | 60 | 59 |
| Rain chance (%) | |
|---|---|
| 1 | 73 |
| 2 | 72 |
| 3 | 70 |
| 4 | 69 |
| 5 | 69 |
| 6 | 68 |
| 7 | 68 |
| 8 | 68 |
| 9 | 68 |
| 10 | 68 |
| 11 | 69 |
| 12 | 69 |
| 13 | 69 |
| 14 | 70 |
| 15 | 70 |
| 16 | 70 |
| 17 | 71 |
| 18 | 71 |
| 19 | 70 |
| 20 | 70 |
| 21 | 70 |
| 22 | 69 |
| 23 | 68 |
| 24 | 67 |
| 25 | 65 |
| 26 | 64 |
| 27 | 63 |
| 28 | 61 |
| 29 | 60 |
| 30 | 60 |
| 31 | 59 |
Humidity in December
Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the oppressive band about 74% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 |
| Muggy (%) | 10 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 24 | 25 | 25 |
| Oppressive (%) | 77 | 76 | 76 | 75 | 75 | 76 | 75 | 76 | 76 | 76 | 77 | 76 | 76 | 76 | 77 | 76 | 76 | 77 | 76 | 75 | 75 | 74 | 74 | 72 | 71 | 71 | 70 | 68 | 69 | 68 | 68 |
| Miserable (%) | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 0 | 10 | 77 | 13 |
| 2 | 0 | 11 | 76 | 13 |
| 3 | 0 | 12 | 76 | 12 |
| 4 | 1 | 12 | 75 | 12 |
| 5 | 1 | 13 | 75 | 11 |
| 6 | 0 | 13 | 76 | 11 |
| 7 | 0 | 14 | 75 | 11 |
| 8 | 0 | 14 | 76 | 10 |
| 9 | 0 | 14 | 76 | 10 |
| 10 | 0 | 14 | 76 | 10 |
| 11 | 0 | 14 | 77 | 9 |
| 12 | 1 | 14 | 76 | 9 |
| 13 | 1 | 14 | 76 | 9 |
| 14 | 1 | 14 | 76 | 9 |
| 15 | 1 | 14 | 77 | 8 |
| 16 | 1 | 15 | 76 | 8 |
| 17 | 1 | 15 | 76 | 8 |
| 18 | 1 | 15 | 77 | 7 |
| 19 | 1 | 16 | 76 | 7 |
| 20 | 2 | 17 | 75 | 6 |
| 21 | 2 | 17 | 75 | 6 |
| 22 | 2 | 18 | 74 | 6 |
| 23 | 2 | 19 | 74 | 5 |
| 24 | 3 | 20 | 72 | 5 |
| 25 | 3 | 21 | 71 | 5 |
| 26 | 3 | 22 | 71 | 4 |
| 27 | 3 | 23 | 70 | 4 |
| 28 | 4 | 24 | 68 | 4 |
| 29 | 4 | 24 | 69 | 3 |
| 30 | 4 | 25 | 68 | 3 |
| 31 | 4 | 25 | 68 | 3 |
Wind in December
Winds average 16 km/h in December.
Across December, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 14 | light breeze |
| 2 | 14 | light breeze |
| 3 | 14 | light breeze |
| 4 | 15 | light breeze |
| 5 | 15 | light breeze |
| 6 | 15 | light breeze |
| 7 | 15 | light breeze |
| 8 | 15 | light breeze |
| 9 | 15 | light breeze |
| 10 | 15 | light breeze |
| 11 | 15 | light breeze |
| 12 | 16 | light breeze |
| 13 | 16 | light breeze |
| 14 | 16 | light breeze |
| 15 | 16 | light breeze |
| 16 | 16 | light breeze |
| 17 | 16 | light breeze |
| 18 | 16 | light breeze |
| 19 | 16 | light breeze |
| 20 | 16 | light breeze |
| 21 | 16 | light breeze |
| 22 | 16 | light breeze |
| 23 | 16 | light breeze |
| 24 | 16 | light breeze |
| 25 | 16 | light breeze |
| 26 | 16 | light breeze |
| 27 | 16 | light breeze |
| 28 | 16 | light breeze |
| 29 | 16 | light breeze |
| 30 | 16 | light breeze |
| 31 | 16 | light breeze |
Sunrise & sunset in December
Daylight runs from about 11 h 30 min at the start of December to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 0 minutes over December. Sunrise moves from 6:09 AM to 6:23 AM, and sunset from 5:41 PM to 5:53 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 |
| Sunrise (AM) | 6:09 | 6:09 | 6:10 | 6:10 | 6:11 | 6:11 | 6:12 | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:15 | 6:15 | 6:16 | 6:16 | 6:17 | 6:17 | 6:18 | 6:18 | 6:19 | 6:19 | 6:20 | 6:20 | 6:20 | 6:21 | 6:21 | 6:22 | 6:22 | 6:23 | 6:23 |
| Sunset (PM) | 5:41 | 5:41 | 5:41 | 5:42 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 | 5:44 | 5:44 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:47 | 5:47 | 5:48 | 5:48 | 5:49 | 5:49 | 5:50 | 5:50 | 5:50 | 5:51 | 5:51 | 5:52 | 5:52 | 5:53 | 5:53 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.5 | 6:09 | 5:41 |
| 2 | 11.5 | 6:09 | 5:41 |
| 3 | 11.5 | 6:10 | 5:41 |
| 4 | 11.5 | 6:10 | 5:42 |
| 5 | 11.5 | 6:11 | 5:42 |
| 6 | 11.5 | 6:11 | 5:42 |
| 7 | 11.5 | 6:12 | 5:43 |
| 8 | 11.5 | 6:12 | 5:43 |
| 9 | 11.5 | 6:13 | 5:44 |
| 10 | 11.5 | 6:13 | 5:44 |
| 11 | 11.5 | 6:14 | 5:44 |
| 12 | 11.5 | 6:14 | 5:45 |
| 13 | 11.5 | 6:15 | 5:45 |
| 14 | 11.5 | 6:15 | 5:45 |
| 15 | 11.5 | 6:16 | 5:46 |
| 16 | 11.5 | 6:16 | 5:46 |
| 17 | 11.5 | 6:17 | 5:47 |
| 18 | 11.5 | 6:17 | 5:47 |
| 19 | 11.5 | 6:18 | 5:48 |
| 20 | 11.5 | 6:18 | 5:48 |
| 21 | 11.5 | 6:19 | 5:49 |
| 22 | 11.5 | 6:19 | 5:49 |
| 23 | 11.5 | 6:20 | 5:50 |
| 24 | 11.5 | 6:20 | 5:50 |
| 25 | 11.5 | 6:20 | 5:50 |
| 26 | 11.5 | 6:21 | 5:51 |
| 27 | 11.5 | 6:21 | 5:51 |
| 28 | 11.5 | 6:22 | 5:52 |
| 29 | 11.5 | 6:22 | 5:52 |
| 30 | 11.5 | 6:23 | 5:53 |
| 31 | 11.5 | 6:23 | 5:53 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 4.16 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 4.16 kWh/m² to a high of 6.51 kWh/m² in March across the year — December's 4.16 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.3 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.2 | Bright |
| 2 | 4.2 | Bright |
| 3 | 4.2 | Bright |
| 4 | 4.2 | Bright |
| 5 | 4.2 | Bright |
| 6 | 4.2 | Bright |
| 7 | 4.2 | Bright |
| 8 | 4.2 | Bright |
| 9 | 4.2 | Bright |
| 10 | 4.2 | Bright |
| 11 | 4.1 | Bright |
| 12 | 4.1 | Bright |
| 13 | 4.1 | Bright |
| 14 | 4.1 | Bright |
| 15 | 4.1 | Bright |
| 16 | 4.1 | Bright |
| 17 | 4.1 | Bright |
| 18 | 4.1 | Bright |
| 19 | 4.1 | Bright |
| 20 | 4.1 | Bright |
| 21 | 4.1 | Bright |
| 22 | 4.1 | Bright |
| 23 | 4.2 | Bright |
| 24 | 4.2 | Bright |
| 25 | 4.2 | Bright |
| 26 | 4.2 | Bright |
| 27 | 4.2 | Bright |
| 28 | 4.3 | Bright |
| 29 | 4.3 | Bright |
| 30 | 4.3 | Bright |
| 31 | 4.3 | Bright |
Hazard calendar for Trincomalee
In December, Trincomalee sits inside its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.
Trincomalee sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Trincomalee's monsoon runs October–December, when most of the year's rain falls.
Is December a good time to visit Trincomalee?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Trincomalee for sightseeing.
What to pack for Trincomalee in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Trincomalee sees daytime highs around 27°C and nights near 25°C. Pack light clothes and rain gear. About 21 days see rain.
Sea temperature near Trincomalee in December
The nearest coast averages about 28°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 17 km away) is warmest in May at about 30°C and coldest in January near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 28 | Warm |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Trincomalee in December
Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Trincomalee peaks around May 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 12 | 13 | 13 | 14 | 11 | 11 | 13 | 12 | 13 | 11 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 14 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 9 | Very high |
Air quality in Trincomalee in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Trincomalee is worst in May — around 28 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 22 | 21 | 24 | 27 | 28 | 21 | 20 | 20 | 21 | 25 | 24 | 22 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 21 | Moderate |
| Mar | 24 | Moderate |
| Apr | 27 | Moderate |
| May | 28 | Moderate |
| Jun | 21 | Moderate |
| Jul | 20 | Moderate |
| Aug | 20 | Moderate |
| Sep | 21 | Moderate |
| Oct | 25 | Moderate |
| Nov | 24 | Moderate |
| Dec | 22 | Moderate |
Where is Trincomalee?
Trincomalee sits at 8.6°N, 81.2°E, 10 m above sea level, in Sri Lanka. The nearest listed city is Vakarai, 54 km away.
Topography around Trincomalee
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Trincomalee.
Within 3 km, the terrain around Trincomalee has only modest variations in elevation — a maximum elevation change of 78 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 161 m; within 80 km, large variations in elevation — a maximum elevation change of 684 m.
The land around Trincomalee is covered by water (62%) within 3 km, water (55%) and trees (24%) within 16 km, and trees (41%) and water (38%) within 80 km.
Sri Lanka travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type D / G / M
- 230 V · 50 Hz
- Prices
- ≈ 27% of US
- price level, 2025
- GDP per capita
- $5,002
- 2025
- Happiness
- 4.0 / 10
- World Happiness, 2025
- Safe drinking water
- 47%
- of population, 2024
- Homicide rate
- 3.3
- per 100k, 2019
- Road deaths
- 19.7
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 486
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Trincomalee (8.5778°, 81.2289°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).