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The average day light hours per day in St Lucia in February are 11.7 and there are 4.7 hours of sunshine per day on average during February making it a sunny month that is overcast at times. The ultraviolet index in St Lucia in February is typically 11.6 during February.
Sea temperature in St Lucia in September: 29Â°C, 84Â°F. Average rainfall in September: 258mm, 10.2in. Note: September is peak hurricane season for most St Lucia and the rest of the Caribbean. Visitors planning a trip to St Lucia in September should check weather reports and forecasts regularly.