UV Index
UV Index
Today's UV index in Saint-Denis, Réunion 
will be up to 5.7, indicating a moderate level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-21
With a UV index reaching up to 5.7 in Saint-Denis, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Saint-Denis, Réunion, can be very high, especially during the summer months when it often reaches levels that are considered extreme. This means the sun is very strong and can cause sunburn quickly.
Saint-Denis experiences a tropical climate with a hot and rainy season from November to April, and a cooler, drier season from May to October. Rainfall is heavier in the summer, while winters are milder and less wet.
Compared to nearby islands like Mauritius and Madagascar, Saint-Denis is generally warmer and wetter due to its location in the Indian Ocean. Its tropical climate is more humid than many parts of mainland France or nearby African countries.
See the UV index hour by hour for Saint-Denis, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.