Galena, MO Climate

Climate Insight: Galena, MO

An annual average temperature of 56°F, ranging from a mean daily high of 68°F to a mean daily low of 44°F is what the NOAA 1991–2020 climate normals report for Galena, Missouri. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00233094 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Galena sees about 46.6 inches of precipitation a year, with 6.9 inches typically falling as snow. The frost-free season averages 188 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 16 and the first fall freeze near October 21. On the energy side, 4,523 heating degree days and 1,368 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Galena scores 78/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.