Climate averages 1991–2020
Trincomalee weather
in May.
A hot, moderately wet month: the 3rd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Trincomalee: daytime highs average 33.5°C and nights cool to about 26.7°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 48 mm of rain on roughly 8 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 31 min on an average May day.
The nearest other city in this atlas is Batticaloa (109 km away). In May its highs average 33.4°C, about as warm as Trincomalee, with 50 mm of rain.
Among the 12 cities listed in Sri Lanka, Trincomalee ranks 1st of 12 for the warmest May highs and 2nd of 12 for the driest May (rainfall, lowest first). The mean May high of those 12 cities is 30.6°C; Trincomalee is 2.9°C warmer than that mean.
From May to June, average highs rise by 0.4°C to 33.8°C, and monthly rainfall falls from 48 mm to 18 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Batticaloa in MaySri Lanka · 109 kmHigh 33.4°C · Low 26.2°C · 50 mm rain
- Kalmunai in MaySri Lanka · 146 kmHigh 32.3°C · Low 26.6°C · 59 mm rain
- Kandy in MaySri Lanka · 157 kmHigh 28.0°C · Low 22.0°C · 125 mm rain
- Point Pedro in MaySri Lanka · 176 kmHigh 31.8°C · Low 27.8°C · 40 mm rain
- Jaffna in MaySri Lanka · 181 kmHigh 31.2°C · Low 28.1°C · 58 mm rain
- Negombo in MaySri Lanka · 216 kmHigh 29.6°C · Low 25.7°C · 255 mm rain
- Colombo in MaySri Lanka · 238 kmHigh 29.5°C · Low 25.4°C · 279 mm rain
- Dehiwala-Mount Lavinia in MaySri Lanka · 244 kmHigh 29.2°C · Low 25.4°C · 293 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.