Houlton, ME Climate

Climate Insight: Houlton, ME

Based on 2 weather stations feeding NOAA's 1991–2020 climate normals, Houlton, Maine averages 41°F a year, ranging from a mean daily high of 52°F to a mean daily low of 30°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.

Anyone planning to live, garden, or travel in Houlton should weigh precipitation alongside temperature: the annual average runs 39.3 inches, with seasonal snowfall possible. The frost-free season averages 114 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 27 and the first fall freeze near September 18. And on the energy front, 9,034 heating degree days and 207 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Houlton scores 54/100 (Moderate), 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.