UV Index
UV Index
Today's UV index in Rochester, United States 
will be up to 7.9, indicating a high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-07-24
With Rochester's UV index reaching 7.9, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.
The UV index in Rochester, United States, varies throughout the year, with higher levels in summer months reaching around 7 to 9, and lower levels in winter dropping to 1 or 2, reflecting seasonal sun exposure changes.
Rochester experiences cold winters with snow, especially from December to February, and warm, humid summers from June to August. Spring and fall are mild and can be rainy, with temperatures gradually shifting between cold and warm.
Compared to other parts of New York State, Rochester is colder and snowier in winter due to lake-effect snow from Lake Ontario. It is generally cooler than neighboring states like Pennsylvania but warmer than areas further north in Canada.
See the UV index hour by hour for Rochester, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.