Fujinomiya is located in central Shizuoka Prefecture on an upland plateau on the foothills and lower slopes of Mount Fuji, with an altitude ranging from . The average temperature is . Much of the city lies within the borders of Fuji-Hakone-Izu National Park. Fujinomiya is known as one of the main starting points for climbing trips to Mount Fuji, the summit of which is partly within the borders of the city. As with most of Shizuoka Prefecture, the area enjoys a warm maritime climate with hot, humid summers and mild, cool winters.