UV Index
UV Index
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Today's UV index in Jacksonville, United States 
will be up to 3.6, indicating moderate 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.
With a UV index reaching up to 3.6 in Jacksonville, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
Read more here about the climate and sun exposure in and around Jacksonville.
The UV index in Jacksonville, United States, can reach high levels, especially during the summer months. The UV index measures the strength of the sun's ultraviolet (UV) radiation and indicates the risk of sunburn and skin damage. In Jacksonville, the UV index can often be between 7 and 10, which is considered very high. It is important to protect your skin by wearing sunscreen, hats, and sunglasses, especially between the hours of 10 am and 4 pm when the sun's rays are strongest.
Jacksonville experiences distinct weather seasons throughout the year. In the summer (June to August), temperatures can be hot and humid, with highs averaging around 32 °C (90 °F). Thunderstorms occur frequently in the summer, providing relief from the heat. Autumn (September to November) brings milder temperatures, ranging from 21 °C to 28 °C (70 °F to 82 °F), with occasional rain showers. Winters (December to February) in Jacksonville are mild, with temperatures averaging around 14 °C (57 °F), although cold fronts can cause temperatures to drop lower. Spring (March to May) brings a gradual increase in temperatures, ranging from 17 °C to 27 °C (63 °F to 80 °F), and occasional showers.
Compared to its region, Jacksonville enjoys a substantial amount of sun exposure due to its location in northeastern Florida. With an average of about 221 sunny days per year, Jacksonville receives more sunlight than many other cities in the region. This provides ample opportunities for outdoor activities and enjoyment of the city's natural beauty. However, it is crucial to be aware of the high UV index and take necessary precautions to protect oneself from the sun's harmful rays, such as applying sunscreen, seeking shade, and wearing appropriate clothing.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Jacksonville. It's designed to provide you with a better understanding of the yearly weather and sun exposure.