Rockville, IN Climate

Climate Insight: Rockville, IN

Based on station USC00127522 feeding NOAA's 1991–2020 climate normals, Rockville, Indiana averages 52°F a year, ranging from a mean daily high of 64°F to a mean daily low of 40°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. Rockville sees about 47.4 inches of precipitation a year, with 13.0 inches typically falling as snow. The frost-free season averages 165 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 30 and the first fall freeze near October 12. On the energy side, 5,635 heating degree days and 917 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Rockville scores 64/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.