Stillwater, OK Climate

Climate Insight: Stillwater, OK

The NOAA 1991–2020 climate normals describe Stillwater, Oklahoma as a location with an annual average temperature of 60°F, ranging from a mean daily high of 72°F to a mean daily low of 48°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00348499, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.

Beyond temperature, Stillwater averages an uncharted amount of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 208 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 6 and the first fall freeze near October 31. Turning to energy use, 3,727 heating degree days and 1,957 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 scores 73/100 (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.