What is the primary difference between a scientific theory and a scientific law? A scientific law is an assumed truth which forms the basis of your theory. Scientific laws are universal and describe observed events.
Average temperature in St Lucia in March: 22 to 28Â°C, 72 to 84Â°F. Sea temperature in St Lucia in March: 26Â°C, 79Â°F. Average rainfall in March: 97mm, 3.8in. Events: St Luciaâs annual festival of comedy kicks off in March with events and shows throughout the month.
Weather on St. Lucia in December. Weather on St. Lucia in December. December marks the beginning of the high-season for travel to St. Lucia. Warm temperatures in the low-80s and relatively dry conditions make the island an perfect place to enjoy fun in the sun while most of North America is covered in winter weather.