UV Index
UV Index
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Today's UV index in Castries, Saint Lucia 
will be up to 11.3, indicating a extreme level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
UV index at 11.3 in Castries means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Castries, Saint Lucia, can reach very high levels, especially during peak sunlight hours. It is important to be aware of this if you are planning outdoor activities.
Castries has two main seasons: a dry season from December to June and a wet season from July to November. The dry season is typically hotter and drier, while the wet season sees more rain and humidity.
Compared to its region and neighboring countries, Castries has a tropical climate with warm temperatures year-round. It is located in the Caribbean, which is known for its beautiful beaches and clear waters. However, the wet season in Castries can bring heavy rainfall and potential disruptions to travel plans.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Castries. It's designed to provide you with a better understanding of the yearly weather and sun exposure.