Bayfield, WI Climate

Climate Insight: Bayfield, WI

An annual average temperature of 42°F, ranging from a mean daily high of 51°F to a mean daily low of 33°F is what the NOAA 1991–2020 climate normals report for Bayfield, Wisconsin. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00470603 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Bayfield averages 33.3 inches of precipitation a year, with 106.3 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 141 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 20 and the first fall freeze near October 8. As for energy demand, 8,720 heating degree days and 268 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Bayfield scores 44/100 (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.