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Elevation: 1991 feet     Latitude: 48 05N     Longitude: 105 38W
Köppen Classification: Tropical and Subtropical Steppe Climate



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 Chelsea is 43.9°F (6.6°C). The warmest month, on average, is July with an average temperature of 72.8°F (22.7°C). The coolest month on average is January, with an average temperature of 12.3°F (-10.9°C).

The highest recorded temperature in Chelsea is 112.0°F (44.4°C), which was recorded in June. The lowest recorded temperature in Chelsea is -44.0°F (-42.2°C), which was recorded in December.

The average amount of precipitation for the year in Chelsea is 13.5" (342.9 mm). The month with the most precipitation on average is June with 3.4" (86.4 mm) of precipitation. The month with the least precipitation on average is February with an average of 0.3" (7.6 mm). There are an average of 45.0 days of precipitation, with the most precipitation occurring in June with 8.0 days and the least precipitation occurring in January with 2.0 days.

In Chelsea, there's an average of 15.2" of snow (0 cm). The month with the most snow is December, with 4.0" of snow (10.2 cm).

Koppen Chart