In Sacramento, the summers are hot, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 39°F to 94°F and is rarely below 31°F or above 102°F. The hot season lasts for 3.7 months, from June 5 to September 26, with an average daily high temperature above 86°F. The hottest month of the year in Sacramento is July, with an average high of 93°F and low of 60°F.

The cool season lasts for 2.9 months, from November 22 to February 18, with an average daily high temperature below 62°F. The coldest month of the year in Sacramento is December, with an average low of 40°F and high of 55°F.The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.