With a population of around 5,500, Grissom Air Force Base sits in Indiana, United States. The city operates in the America/Indiana/Indianapolis time zone.
In 2025, Grissom Air Force Base recorded an average annual temperature of 52°F. The hottest temperatures reached 93°F in June; the coolest were -3°F in January. Total precipitation for the year was 32 inches, with the wettest month being April. Snowfall for the year totaled approximately 10 inches.
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