About Saint John, MO

Saint John, in Missouri, United States, is home to roughly 6,600 people in the Central Time Zone at 38.7°N latitude.

Across a typical year Saint John sees about 41 inches of precipitation, with May the wettest month and February the driest. Temperatures range from January lows near 24°F up to July highs around 89°F, averaging 57°F annually — characteristic of a humid continental climate.