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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.
Key weather averages for St Lucia in March. 1  29. 29Â°C max day temperature. 2  8. 8 hours of sunshine per day. 3  11. 11 days with some rainfall. 4  21. 21Â°C min night temperature. 5  12. 12 hours of daylight per day. 6  M. 7  130. 130 mm of monthly rainfall. 8  10. 10 (Very High) UV index. 9  27. 27Â°C sea temperature.