UV Index
UV Index
Today's UV index in Key West, United States 
will be up to 11.2, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-21
UV index at 11.2 in Key West means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Key West is often very high, especially during summer months, frequently reaching levels between 8 and 11, which means strong sun exposure most days of the year.
Key West experiences a tropical climate with hot, humid summers and mild, dry winters. Rainfall peaks during the wet season from June to October, while the dry season from November to May is sunnier and less humid.
Compared to the wider Florida region, Key West is generally warmer and more humid year-round. It has milder winters than mainland Florida. Neighboring countries like Cuba and the Bahamas have similar tropical weather but often experience slightly more rainfall.
See the UV index hour by hour for Key West, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.