UV Index
UV Index
Today's UV index in Köln, Germany 
will be up to 5.4, indicating a moderate 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 a UV index reaching up to 5.4 in Köln, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
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.