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Las Vegas has an arid or semi-arid climate — extreme heat and very low humidity define the summer months, creating ventilation conditions unlike any other climate type. Summer daytime highs regularly exceed 38–45°C, making outdoor air far hotter than indoor air for the majority of daylight hours. During peak summer, windows should generally be kept closed during the day; the viable ventilation opportunity is overnight, when temperatures can drop 15–20°C from the afternoon peak in true desert climates.
That overnight temperature drop is Las Vegas's ventilation advantage. From roughly 10 PM through 6–7 AM in summer, outdoor air cools to 20–28°C — conditions where cross-ventilation can effectively cool a building with good thermal mass. Structures with thick walls, concrete, or stone work best: they absorb cool night air and release it slowly through the hot day. Dust and particulates are the key air quality concern in desert climates — sandstorms and dust events can raise PM10 concentrations to hazardous levels within hours. OpenWindow.live monitors real-time particulate data to flag these events before you open a window.
Em Las Vegas, os melhores momentos para ventilar são geralmente de manhã cedo (5–8h) e ao final da noite, quando a temperatura exterior desce abaixo da interior.
Sim, na maioria dos casos. Abrir as janelas pode baixar a temperatura interior em 2–5°C em 30 minutos se o ar exterior estiver mais fresco.
Acima de 80%, abrir as janelas torna o ar pegajoso. Melhor esperar por horas mais secas.