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This climate type occurs primarily on the periphery of the true deserts in low-latitude semiarid steppe regions. It is transitional to the tropical wet-dry climate on the equatorward side and to the mediterranean climate on its poleward margin, with a cooler, wetter winter resulting from the higher latitude and mid-latitude frontal cyclone activity. Annual precipitation totals are greater than in tropical and subtropical desert climates. Yearly variations in amount are not as extreme as in the true deserts but are nevertheless large.
The Köppen Climate Classification subtype for this climate is "BSk". (Tropical and Subtropical Steppe Climate).
The average temperature for the year in Zacatecas is 57.0°F (13.9°C). The warmest month, on average, is May with an average temperature of 63.0°F (17.2°C). The coolest month on average is January, with an average temperature of 50.0°F (10°C).
The highest recorded temperature in Zacatecas is 96.8°F (36°C), which was recorded in May. The lowest recorded temperature in Zacatecas is 12.2°F (-11°C), which was recorded in December.
The average amount of precipitation for the year in Zacatecas is 8.9" (226.1 mm). The month with the most precipitation on average is August with 2.6" (66 mm) of precipitation. The month with the least precipitation on average is February with an average of 0.1" (2.5 mm). In terms of liquid precipitation, there are an average of 56.0 days of rain, with the most rain occurring in July with 10.1 days of rain, and the least rain occurring in March with 1.0 days of rain.