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Farley, IA Weather. Farley, IA climate is warm during summer when temperatures tend to be in the 70's and extremely cold during winter when temperatures tend to be in the 10's.
Typical of Iowa, Sioux City has a humid continental climate, with very warm, humid summers, cold, dry winters, and wide temperature extremes; it is part of USDA Hardiness zone 5a. The normal monthly mean temperature ranges from 20.4 Â°F (â6.4 Â°C) in January to 74.3 Â°F (23.5 Â°C) in July.