Mellen, WI Climate

Climate Insight: Mellen, WI

An annual average temperature of 40°F, ranging from a mean daily high of 51°F to a mean daily low of 30°F is what the NOAA 1991–2020 climate normals report for Mellen, Wisconsin. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00475286 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Mellen averages 34.7 inches of precipitation a year, with 102.6 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 124 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 26 and the first fall freeze near September 27. As for energy demand, 9,186 heating degree days and 265 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Mellen scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.