In terms of precipitation, rainfall in Trincomalee ranges from 0.8 - 13.8 inches per month. November is typically the wettest month, when rainfall can reach 13.8 in. June is typically the driest time to visit Trincomalee when rainfall is around 0.8 in.
If weather is an important factor for your trip to Trincomalee, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).