León, a major industrial city in the state of Guanajuato, sits on the Bajío plain of central Mexico at around 1,800 metres above sea level, at approximately 21.13°N, 101.68°W. Its altitude tempers the tropical latitude to give a mild semi-arid highland climate (Köppen BSk/Cwb) — warm, spring-like days year-round — with a summer rainy season and a long dry season.

There is no summer in the temperate sense: temperatures stay mild all year, with daytime highs around 27–30°C, warmest in April and May before the rains break. The wet season, from June to September, brings warm, bright mornings that cloud over into heavy afternoon and evening thunderstorms, greening the Bajío farmland, with July the wettest month.

There is no true winter, but the dry season from November to April brings warm, sunny days around 24–26°C and cold nights that can drop to 4–6°C, occasionally to frost on the plateau. Rain is essentially absent, skies are clear and bright, and the day-to-night temperature swing is wide, a hallmark of the high, dry interior.

León is dry, receiving only around 600–700 mm of rain a year, almost all of it in the summer wet season from June to September, while November to April is nearly rainless. The rains are erratic and the Bajío region is prone to drought when they fail. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.

León sits on the fertile Bajío plain, whose farming depends entirely on the reliability of the brief summer rains — when the monsoon falters, drought bites hard across central Mexico. Its plateau altitude gives it the mild, sunny days and sharply cold nights typical of highland Mexico, with a temperature swing of 20°C or more on a clear winter day.

To follow any single measurement in Leon more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.