Tyndall, SD Climate

Climate Insight: Tyndall, SD

Based on station USC00398472 feeding NOAA's 1991–2020 climate normals, Tyndall, South Dakota averages 47°F a year, ranging from a mean daily high of 59°F to a mean daily low of 36°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. Tyndall sees about 26.2 inches of precipitation a year, with 36.6 inches typically falling as snow. The frost-free season averages 159 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 1 and the first fall freeze near October 7. On the energy side, 7,256 heating degree days and 833 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Tyndall 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.