Walnut Creek, AZ Climate

Climate Insight: Walnut Creek, AZ

The NOAA 1991–2020 climate normals describe Walnut Creek, Arizona as a location with an annual average temperature of 54°F, ranging from a mean daily high of 73°F to a mean daily low of 35°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00029158, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.

Walnut Creek averages 14.8 inches of precipitation a year, with 5.5 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 136 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 24 and the first fall freeze near October 7. As for energy demand, 4,663 heating degree days and 639 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Walnut Creek scores 54/100 (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 December-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.