UV Index
UV Index
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Today's UV index in Saint-Denis, Réunion 
will be up to 13.1, indicating extreme risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.
UV index at 13.1 in Saint-Denis 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.
Read more here about the climate and sun exposure in and around Saint-Denis.
In Saint-Denis, Réunion, the UV index can reach high levels due to its location near the equator. During summer (December to March), the UV index can rise to 11 (very high) on a scale of 1 to 11+, which indicates an extreme risk of harm from unprotected sun exposure. It is crucial to protect your skin by applying sunscreen, wearing sun-protective clothing, and avoiding direct sunlight during peak hours.
Saint-Denis experiences a tropical climate with two distinct seasons. The hot and humid summer season lasts from November to April, with average temperatures ranging from 24 °C (75 °F) to 31 °C (88 °F). The cooler and drier winter season occurs from May to October, bringing temperatures ranging from 19 °C (66 °F) to 25 °C (77 °F). Rainfall is common throughout the year, with the wettest months being February to April.
Compared to other regions, Saint-Denis receives a higher amount of annual rainfall and experiences milder temperature variations. This is due to its location in the southern Indian Ocean, where the oceanic influence helps moderate the climate. However, it is important to note that Saint-Denis, like other islands in the region, is susceptible to tropical cyclones, which can bring strong winds and heavy rainfall. Additionally, the proximity to the equator exposes this region to strong UV radiation, necessitating precautions for skin protection.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Saint-Denis. It's designed to provide you with a better understanding of the yearly weather and sun exposure.