UV Index
UV Index
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Today's UV index in Köln, Germany 
will be up to 0.6, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.
Today, the UV index suggests low sun danger (0-2) in Köln, reaching up to 0.6. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
Read more here about the climate and sun exposure in and around Köln.
In Köln, Germany, the UV index ranges from low to moderate throughout the year. It is important to protect your skin by wearing sunscreen and seeking shade during peak sun hours, especially in the summer when the UV index can reach its highest levels.
Köln experiences four distinct weather seasons. Spring (March to May) brings mild temperatures ranging from 5 °C (41 °F) to 15 °C (59 °F), with occasional rain showers and blossoming flowers. Summer (June to August) brings warmer weather, averaging between 15 °C (59 °F) and 25 °C (77 °F), providing a great time for outdoor activities. Autumn (September to November) brings cooler temperatures ranging from 10 °C (50 °F) to 20 °C (68 °F) and vibrant foliage. Winter (December to February) can be cold, with temperatures hovering around 0 °C (32 °F), sometimes dropping below freezing, and occasional snowfall.
Compared to its region, Köln receives a moderate amount of sunshine. However, due to its proximity to higher latitude zones, the region experiences shorter daylight hours during winter. This means fewer hours of direct sunlight compared to more southern areas. It's important to be mindful of seasonal changes, protecting your skin during summer and ensuring warmth during winter.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Köln. It's designed to provide you with a better understanding of the yearly weather and sun exposure.