Greenville, MI Climate

Climate Insight: Greenville, MI

In Greenville, Michigan, the NOAA 1991–2020 climate normals put the annual average temperature at 47°F, ranging from a mean daily high of 59°F to a mean daily low of 35°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00203429, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Beyond temperature, Greenville averages 36.6 inches of precipitation annually, with 72.9 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 133 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 18 and the first fall freeze near September 28. Turning to energy use, 7,060 heating degree days and 520 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Greenville scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, July-driven heat at the peak of summer, and January-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.