UV Index
UV Index
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Today's UV index in Saint-Denis, Réunion 
will be up to 13.1, 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 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.
The UV index in Saint-Denis, Réunion is high, with a year-round average of 11. It can reach extreme levels during peak sunlight hours, making sun protection essential.
Saint-Denis has two main seasons: a warm, wet season from November to April and a cooler, drier season from May to October. Temperatures remain relatively consistent, ranging from 20°C to 28°C (68°F to 82°F).
Compared to its region and neighboring countries, Saint-Denis has a unique climate. Its tropical location results in warm temperatures and high humidity, contrasting with the milder, drier climates of nearby Mauritius and Madagascar. Réunion's landscape, including its volcanic peaks, also contributes to its diverse weather patterns.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Saint-Denis. It's designed to provide you with a better understanding of the yearly weather and sun exposure.