Middletown Harrisburg, PA Climate

Climate Insight: Middletown Harrisburg, PA

Middletown Harrisburg, Pennsylvania runs an annual average of 54°F, ranging from a mean daily high of 64°F to a mean daily low of 45°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USW00014711, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Middletown Harrisburg sees about 44.2 inches of precipitation a year, with 29.9 inches typically falling as snow. The frost-free season averages 207 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 9 and the first fall freeze near November 2. On the energy side, 5,024 heating degree days and 1,171 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Middletown Harrisburg scores 63/100 (Good), 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.