Lancaster, NH Climate

Climate Insight: Lancaster, NH

Based on station USC00274556 feeding NOAA's 1991–2020 climate normals, Lancaster, New Hampshire averages 42°F a year, ranging from a mean daily high of 54°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.

Lancaster averages 39.8 inches of precipitation a year, with 76.1 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 135 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 18 and the first fall freeze near September 30. As for energy demand, 8,619 heating degree days and 249 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Lancaster 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.