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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.
St. Lucia weather in September and October is the worst part of the annual hurricane season. The number of rain days each month varies as well from a low of 12 in April to a high of at least 20 days from July through November.he average low temperatures hover around the mid-70s. But it's the rainfall that determines the popularity of each month with visitors. St. Lucia weather in February through May is part of a regular dry season.