Shenandoah, IA Climate

Climate Insight: Shenandoah, IA

Based on station USC00137613 feeding NOAA's 1991–2020 climate normals, Shenandoah, Iowa averages 52°F a year, ranging from a mean daily high of 63°F to a mean daily low of 41°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.

Shenandoah averages 36.4 inches of precipitation a year, with 26.4 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 180 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 20 and the first fall freeze near October 17. As for energy demand, 5,968 heating degree days and 1,182 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Shenandoah scores 59/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.