UV Index
UV Index
Today's UV index in Fresno, United States 
will be up to 8.7, indicating a very 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: 2025-05-09
With a UV index of 8.7 in Fresno, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
Fresno's UV index often reaches high levels, especially during summer, with values around 8 to 11 on sunny days. Winter UV levels are lower, generally between 2 and 4. UV exposure is strongest midday.
The city experiences hot, dry summers with temperatures often above 90°F (32°C) and mild, wetter winters with temperatures around 50-60°F (10-15°C). Rainfall mostly occurs from November to March, while summers are mostly dry and sunny.
Compared to nearby coastal cities, Fresno has hotter summers and less humidity. Its UV levels are higher than coastal areas but similar to other Central Valley locations. Neighboring states like Nevada and Arizona often have even stronger UV radiation and hotter summers.
See the UV index hour by hour for Fresno, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.