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This climate type is characterized by extremely variable temperature conditions, with annual means decreasing and annual ranges increasing poleward, and relatively little precipitation. This climate is typically located deep within the interiors of continents and is contiguous with the tropical desert climates of North and South America and of central Asia. This region type owes its origins to locations deep within continental interiors, far from the windward coasts and sources of moist, maritime air. Remoteness from sources of water vapor is enhanced in some regions by mountain barriers upwind.
The Köppen Climate Classification subtype for this climate is "Bsh". (Mid-Latitude Steppe and Desert Climate).
The average temperature for the year in McAllen is 74.0°F (23.3°C). The warmest month, on average, is July with an average temperature of 85.0°F (29.4°C). The coolest month on average is January, with an average temperature of 61.0°F (16.1°C).
The highest recorded temperature in McAllen is 106.0°F (41.1°C), which was recorded in May. The lowest recorded temperature in McAllen is 19.0°F (-7.2°C), which was recorded in February.
The average amount of precipitation for the year in McAllen is 23.0" (584.2 mm). The month with the most precipitation on average is September with 3.1" (78.7 mm) of precipitation. The month with the least precipitation on average is January with an average of 0.9" (22.9 mm). There are an average of 54.0 days of precipitation, with the most precipitation occurring in February with 7.0 days and the least precipitation occurring in June with 2.0 days.
In terms of liquid precipitation, there are an average of 41.4 days of rain, with the most rain occurring in September with 5.1 days of rain, and the least rain occurring in March with 1.8 days of rain.
In McAllen, there's an average of 0.0" of snow (0 cm). The month with the most snow is January, with 0.0" of snow (0 cm).