UV Index
UV Index
0.0
00%
00.0 ℃
Today's UV index in Tucson, United States 
will be up to 3.5, 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 3.5 in Tucson, 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 Tucson.
The UV index in Tucson, United States reaches high levels due to its sunny climate. During the summer months (June to August), the UV index ranges from 9 to 11, indicating extreme risk of sunburn. It is important to take precautions like wearing sunscreen, hats, and sunglasses to protect the skin from harmful UV radiation.
Tucson experiences two main weather seasons: a hot, dry summer and a mild, pleasant winter. In summer (June to September), temperatures can soar above 37 °C (100 °F) with low humidity, while winter (December to February) brings milder temperatures, averaging around 20 °C (68 °F) during the day. Spring and fall are transitional seasons, characterized by warm days and cool nights.
Compared to its region, Tucson has more sun exposure and drier conditions. It receives around 286 days of sunshine per year, compared to the national average of 205 days. Other cities in the region, like Phoenix and Las Vegas, have similar weather patterns with scorching summers. However, Tucson tends to be slightly cooler due to its higher elevation and proximity to mountain ranges, offering some relief from the intense desert heat.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Tucson. It's designed to provide you with a better understanding of the yearly weather and sun exposure.