UV Index
UV Index
Today's UV index in Winterthur, Switzerland 
will be up to 6.2, indicating a 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: 2025-05-09
With Winterthur's UV index reaching 6.2, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.
The UV index in Winterthur is usually low during winter, often between 0 and 2, increasing to moderate levels, around 3 to 5, during the summer months. UV exposure is generally lower in winter due to shorter daylight hours and cloud cover.
Winterthur experiences cold winters with temperatures often below freezing and regular snowfall. Summers are mild to warm, with temperatures ranging from 20 to 25°C (68 to 77°F). Spring and autumn bring moderate temperatures and variable weather, including rain.
Compared to other Swiss cities, Winterthur has a similar climate but slightly milder than higher-altitude Alpine areas. It is cooler and less rainy than nearby southern regions such as Ticino. Compared to neighboring Germany, Winterthur tends to have colder winters and more snowfall.
See the UV index hour by hour for Winterthur, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.