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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 Choteau is 43.0°F (6.1°C). The warmest month, on average, is July with an average temperature of 66.0°F (18.9°C). The coolest month on average is January, with an average temperature of 20.0°F (-6.7°C).
The highest recorded temperature in Choteau is 106.0°F (41.1°C), which was recorded in August. The lowest recorded temperature in Choteau is -50.0°F (-45.6°C), which was recorded in February.
The average amount of precipitation for the year in Choteau is 12.9" (327.7 mm). The month with the most precipitation on average is June with 2.5" (63.5 mm) of precipitation. The month with the least precipitation on average is February with an average of 0.5" (12.7 mm). There are an average of 72.0 days of precipitation, with the most precipitation occurring in June with 9.0 days and the least precipitation occurring in October with 4.0 days.
In terms of liquid precipitation, there are an average of 30.3 days of rain, with the most rain occurring in June with 5.7 days of rain, and the least rain occurring in December with 1.3 days of rain.
In Choteau, there's an average of 51.0" of snow (129.5 cm). The month with the most snow is January, with 8.9" of snow (22.6 cm).