The average annual relative humidity level in Las Vegas is 31 percent.
Las Vegas has dry heat, meaning it has low humidity, and the city’s typically high temperatures are more bearable than in other areas with wet heat.
Exposure to high levels of relative humidity can lead to the rapid growth of fungi and increased ozone formation, among other things.
Humidity below 30 percent can be noticeably uncomfortable, causing respiratory problems, increased susceptibility to rhinovirus, and exacerbation of allergies.
Heat exhaustion is a medical emergency caused by a loss of fluid and electrolytes from excessive sweating. Symptoms include nausea, dizziness, headache, weakness, and thirst.
The best time to visit Las Vegas depends on what you want to do when you get there. The city truly has something for everyone.