UV Index
UV Index
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Today's UV index in Seattle, United States 
will be up to 0.7, 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 Seattle, reaching up to 0.7. 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 Seattle.
The UV index in Seattle typically ranges from low to moderate, reaching a maximum of 6 (out of 11) during the summer months. It’s important to protect yourself from the sun's harmful rays even on cloudy days. Wearing sunscreen, sunglasses, and a hat can help reduce the risk of sunburn and long-term skin damage.
Seattle experiences distinct weather seasons. In spring (March to May), temperatures range from 6 °C to 16 °C (43 °F to 61 °F) with variable rainfall. Summers (June to August) are mild, with temperatures averaging 13 °C to 24 °C (55 °F to 75 °F) and low humidity. Fall (September to November) brings cooler temperatures between 8 °C and 15 °C (46 °F to 59 °F) along with increased rainfall. Winters (December to February) are cool and wet, with temperatures ranging from 3 °C to 10 °C (37 °F to 50 °F) and occasional snowfall.
Compared to other regions, Seattle has a relatively mild climate due to its proximity to the Pacific Ocean and the Cascade Mountains. It enjoys mild summers but experiences higher rainfall than many other parts of the United States. The cloud cover in Seattle helps protect from excessive sun exposure, but it remains important to ensure sun safety measures are employed to reduce the risk of UV radiation-related health issues.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Seattle. It's designed to provide you with a better understanding of the yearly weather and sun exposure.