Washington, OK Climate

Climate Insight: Washington, OK

The NOAA 1991–2020 climate normals describe Washington, Oklahoma as a location with an annual average temperature of 61°F, ranging from a mean daily high of 73°F to a mean daily low of 49°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00349346, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.

Washington averages an uncharted amount of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 217 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 31 and the first fall freeze near November 3. As for energy demand, 3,326 heating degree days and 1,921 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Washington scores 73/100 (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.