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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.
Average Weather in January in Castries St. Lucia. In Castries, the month of January is characterized by essentially constant daily high temperatures, with daily highs around 83Â°F throughout the month, rarely exceeding 85Â°F or dropping below 81Â°F. Daily low temperatures are around 75Â°F, rarely falling below 72Â°F or exceeding 78Â°F.