UV Index
UV Index
Today's UV index in Köln, Germany 
will be up to 6.4, 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: 2025-06-01
With Köln's UV index reaching 6.4, 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.
Köln's UV index is generally moderate, ranging from low in winter to moderate or high in summer, peaking during clear, sunny days. UV levels can occasionally reach around 7 during the hottest months. Seasonally, Köln experiences cool winters with occasional frost and snow, mild springs with increasing sunshine, warm summers often reaching 25-30°C, and colorful, crisp autumns with variable rainfall. Compared to nearby cities like Düsseldorf or Bonn, Köln's weather is quite similar, with slightly more rainfall than eastern Germany but less than coastal northern Germany. Neighboring countries like the Netherlands and Belgium share comparable temperate climates.
See the UV index hour by hour for Köln, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.