Mogami is located in the mountains of extreme northeastern Yamagata Prefecture. Despite its name, the
Mogami River does not run through the town. The area is known for extremely heavy snows in winter.
Neighboring municipalities • Akita Prefecture •
Yuzawa • Miyagi Prefecture •
Kami •
Ōsaki • Yamagata Prefecture •
Funagata •
Obanazawa •
Shinjō Climate Mogami has a
humid continental climate (
Köppen climate classification Cfa) with large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. Precipitation is significant throughout the year, but is heaviest from August to October. The average annual temperature in Mogami is . The average annual rainfall is with July as the wettest month. The temperatures are highest on average in August, at around , and lowest in January, at around . {{Weather box ==Demographics==