Hayward Air Terminal, CA Climate

Climate Insight: Hayward Air Terminal, CA

Hayward Air Terminal, California runs an annual average of 60°F, ranging from a mean daily high of 69°F to a mean daily low of 51°F, per NOAA's 1991–2020 climate normals. August is typically the warmest month of the year, while January is the coldest. Drawn from station USW00093228, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Hayward Air Terminal sees about 16.0 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 357 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 2 and the first fall freeze near December 25. On the energy side, 2,315 heating degree days and 367 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Hayward Air Terminal scores 75/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings August-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.