UV Index
UV Index
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Today's UV index in Philadelphia, United States 
will be up to 1.8, 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 Philadelphia, reaching up to 1.8. 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 Philadelphia.
The UV Index in Philadelphia ranges from moderate to high throughout the year. In summer (June to August), the index reaches its peak, often reaching 8 or higher. It is important to protect your skin by wearing sunscreen, sunglasses, and a hat, and by seeking shade during peak sun hours to avoid sunburn and reduce the risk of skin damage.
Philadelphia experiences four distinct seasons. Spring (March to May) brings mild temperatures, ranging from 5 °C to 20 °C (41 °F to 68 °F), with occasional rain showers. Summer (June to August) is warm and humid, with temperatures ranging from 20 °C to 30 °C (68 °F to 86 °F). Fall (September to November) is cool and pleasant, with temperatures ranging from 10 °C to 20 °C (50 °F to 68 °F) and colorful foliage. Winter (December to February) is cold and snowy, with temperatures ranging from -3 °C to 7 °C (26 °F to 45 °F).
Compared to its region, Philadelphia experiences moderate sun exposure. It is located in the northeastern part of the United States, where summers can be hot and humid, while winters are cold and snowy. The city receives an average of 206 sunny days per year, which is slightly higher than the U.S. average of 205. However, other cities in the region may have higher or lower sun exposure depending on their location and proximity to bodies of water. It is essential to check the local weather forecast for accurate information on sun exposure in specific areas.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Philadelphia. It's designed to provide you with a better understanding of the yearly weather and sun exposure.