THUNDER BASIN NATIONAL GRASSLAND, WYOMING

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 K�ppen Climate Classification subtype for this climate is "BSk". (Tropical and Subtropical Steppe Climate).

The average amount of precipitation for the year in Thunder Basin National Grassland is 10.8" (274.3 mm). The month with the most precipitation on average is May with 2.8" (71.1 mm) of precipitation. The month with the least precipitation on average is January with an average of 0.2" (5.1 mm). There are an average of 51.0 days of precipitation, with the most precipitation occurring in May with 9.0 days and the least precipitation occurring in January with 2.0 days.

In Thunder Basin National Grassland, there's an average of 8.8" of snow (0 cm). The month with the most snow is February, with 3.0" of snow (7.6 cm).