Stillwater Rgnl, OK Climate

Climate Insight: Stillwater Rgnl, OK

An annual average temperature of 62°F, ranging from a mean daily high of 74°F to a mean daily low of 49°F is what the NOAA 1991–2020 climate normals report for Stillwater Rgnl, Oklahoma. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USW00003965 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Stillwater Rgnl averages 33.2 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 211 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 3 and the first fall freeze near October 31. As for energy demand, 3,449 heating degree days and 2,194 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Stillwater Rgnl scores 88/100 (Excellent), 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.