UV Index
UV Index
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Today's UV index in Henderson, United States 
will be up to 11.2, indicating a extreme level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
UV index at 11.2 in Henderson means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Henderson, United States, is typically high due to its desert climate. On average, the UV index can reach levels of 9 or higher from April to September.
Henderson experiences four distinct seasons, with a long, hot summer and a short, mild winter. Spring and fall are brief transitions, bringing pleasant temperatures and low humidity. Summer temperatures can exceed 100°F, while winter temperatures rarely drop below freezing.
Compared to its region and neighboring countries, Henderson is generally drier and sunnier. The city receives significantly less rainfall than the US average, with only about 9 inches of precipitation per year. In contrast, cities in nearby Mexico and coastal California have higher rainfall and humidity levels. Henderson's weather is more similar to that of other desert regions, such as Arizona and New Mexico.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Henderson. It's designed to provide you with a better understanding of the yearly weather and sun exposure.