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Re: February weather St. Lucia Jul 28, 2009, 10:53 PM February is definitely a good time to go to St. Lucia,as you typically have low amount of rainfall during that month. The average temperature should be about 80-85 degrees. If it happens to rain, then you usually get 10 minute showers during the day and after that the sun comes out again.
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.