According to the National Weather Service, 2015 will go down as one of the hottest years on record in Sacramento. How do recent years’ temperatures compare to those of 50 or 100 years ago? The interactive heat maps below represent over 123 years of Sacramento weather data (from National Weather Service site Sacramento 5 ESE); daily high temperatures, daily lower temperatures, and daily precipitation. These interactive data visualizations allow you to explore the temperatures and precipitation for almost every day over the last 123 years. (There are a few days where no data was recorded. These are represented as the white “holes” in the colorful grids. Notice that in fact there is a higher density of dark orange and dark red in the most recent years, at the top of the graph, than at the bottom of the graph.

Data source: National Climatic Data Center.

Hover mouse over the small rectangles for details for each day.

View more Data Visualizations of Sacramento Weather Data.