UV Index
UV Index
Today's UV index in Thun, Switzerland 
will be up to 9.3, indicating a very high 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 of 9.3 in Thun, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
The UV index in Thun varies by season, typically higher in summer, reaching moderate to high levels around 6 to 8, and lower in winter, often below 2. Thun experiences four distinct seasons: cold, snowy winters; mild springs with occasional rain; warm, sunny summers; and cool, colorful autumns with some rainfall. Compared to the wider Swiss region, Thun has a relatively moderate climate due to its location near Lake Thun, making it slightly milder than higher alpine areas and cooler than southern neighboring countries like Italy.
See the UV index hour by hour for Thun, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.