 On a standard day where temperatures are 59°F (15°C), the AH-64 has a vertical rate of climb of 1,775 feet per minute, and a service ceiling of 21,000 feet (6,400 m). However, on a hot day where temperatures are 70°F (21°C), its vertical rate of climb is reduced to 1,595 fpm, and service ceiling is reduced to 19,400 feet (5,900 m) due to less dense air.
