Today, the UV index suggests low sun danger (0-2) in Basel, reaching up to 1. 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 Basel.
The UV index in Basel, Switzerland can vary throughout the year. In summer (June-August), when the sun's rays are more direct, the UV index can reach high levels, ranging from 6 to 9 (high to very high). It's important to protect your skin by using sunscreen, wearing protective clothing, and seeking shade during peak hours to minimize the risk of sunburn and skin damage.
Basel experiences four distinct seasons: spring, summer, autumn, and winter. Spring (March-May) is mild and gradually gets warmer, with temperatures ranging from 5 °C to 16 °C (41 °F to 61 °F). Summer (June-August) brings warm temperatures, averaging between 15 °C to 25 °C (59 °F to 77 °F), with occasional heatwaves reaching up to 35 °C (95 °F). Autumn (September-November) is characterized by mild temperatures, ranging from 9 °C to 18 °C (48 °F to 64 °F), and colorful foliage. Winter (December-February) is cold, with temperatures ranging from -1 °C to 6 °C (30 °F to 43 °F), occasionally dropping below freezing point.
Compared to other regions in Switzerland, Basel generally enjoys a milder climate due to its location in the Rhine River Valley. However, it also means less wind circulation, which can lead to stagnant air in summer and potential for heatwaves. Basel experiences considerable sunshine throughout the year, with around 2,000 to 2,200 hours of annual sunshine. This makes it a great place for outdoor activities and enjoying the city's vibrant atmosphere.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Basel. It's designed to provide you with a better understanding of the yearly weather and sun exposure.