Grayson, KY Climate

Climate Insight: Grayson, KY

In Grayson, Kentucky, the NOAA 1991–2020 climate normals put the annual average temperature at 54°F, ranging from a mean daily high of 67°F to a mean daily low of 41°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from 2 weather stations, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Grayson receives roughly 46.1 inches of precipitation each year, with 18.1 inches typically falling as snow. The frost-free season averages 173 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 27 and the first fall freeze near October 17. For energy use, 4,952 heating degree days and 980 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Grayson scores 64/100 (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.