Current Weather and Forecast in Castries, Saint Lucia
Saint Lucia 🇱🇨
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About the weather in Castries
Castries has a tropical wet-and-dry climate. September is the warmest month, with average highs of 86°, and January the coldest, when nights fall to around 73°. July brings the most rain, on about 24 days, while April is the sunniest, with 11.8 hours of sunshine a day. Over a whole year it rains on roughly 216 days.
Castries climate guide: monthly averages, seasons and the best time to visit
Common questions
What is the rainiest month in Castries?
July, at 4.6 inches (116 mm) over about 24 days. April is the driest month, at 1.5 inches (38 mm).
When is Castries at its hottest?
September, averaging 86°F (30°C) by day and 77°F (25°C) overnight. The hottest single day in our 2015-2024 record for this location reached 91°F (33°C).
Is there snow in Castries?
Effectively no. The 2015-2024 record for Castries shows no regular measurable snowfall.
Which month is coolest in Castries?
January, with highs of 81°F (27°C) and lows near 73°F (23°C). The coldest day in the 2015-2024 record fell to 67°F (19°C).
When should I visit Castries?
Aim for January to April and July if you get the choice: humidity and rainfall are at their lowest, which is what actually varies here, and highs average 83°F (28°C) against roughly 17 wet days a month. For the same question asked the other way round, see where else is warm in January.
How many rainy days does Castries get in a year?
About 216 days bring measurable precipitation, totalling 36.2 inches (920 mm). That works out at roughly 4.3 mm on an average wet day.