Grand Coteau, LA Climate

Climate Insight: Grand Coteau, LA

Based on station USC00163800 feeding NOAA's 1991–2020 climate normals, Grand Coteau, Louisiana averages 68°F a year, ranging from a mean daily high of 79°F to a mean daily low of 58°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Grand Coteau sees about 61.6 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 268 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near February 28 and the first fall freeze near November 23. On the energy side, 1,467 heating degree days and 2,698 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Grand Coteau scores 72/100 (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.