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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.
Weather and Climate. The weather at the summit of HaleakalÄ National Park is unpredictable and can change quickly. Be prepared for a variety of conditions. Temperatures in the summit area commonly range between 32Â°F and 65Â°F. The wind-chill can dramatically drop the temperature below freezing any time of year. Intense sunlight, thick clouds, heavy rain, and high winds are possible at any time.