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Monterrey has a continental monsoon climate with four sharply distinct seasons and a rainy summer period that defines the annual rhythm. Winters are cold and dry (typically −5 to 5°C), springs warm rapidly, and summers bring both high heat — often reaching 32–38°C — and the summer rain season that raises humidity significantly. Autumn is typically the most comfortable season for ventilation: clear skies, lower humidity, and falling but still-comfortable temperatures after the summer heat.
The summer ventilation window in Monterrey is compressed by the combination of heat and humidity. Early morning is the most viable time: from 5–8 AM, overnight cooling brings temperatures down to 22–27°C with lower humidity than the afternoon peak. The monsoon rain periods temporarily reset conditions — the hours following summer rainfall often offer the day's best air quality and most comfortable temperatures. Winter brings the opposite challenge: cold dry air is easy to ventilate briefly, but heating emissions — coal, gas, or wood — can spike outdoor PM2.5 on calm, cold days. OpenWindow.live's real-time AQI monitoring is particularly valuable in Monterrey during winter inversions, when air quality can deteriorate rapidly without obvious visible cues.
À Monterrey, les meilleurs moments pour aérer sont généralement tôt le matin (5–8h) et le soir tard, quand la température extérieure passe sous celle de l'intérieur.
Oui, dans la plupart des cas. Ouvrir les fenêtres peut faire baisser la température intérieure de 2–5°C en 30 minutes si l'air extérieur est plus frais.
Au-dessus de 80%, ouvrir les fenêtres rend l'air collant. Mieux vaut attendre des heures plus sèches.