The analysis compiles daily temperature records for the United States since 1920, and shows the percentage of records in each decade that were hot or cold.
The last five years have been the hottest five in recorded history
Take a look at how record high temperatures have compared to record lows in your city.
Summer minimum temperatures are warming fast across the U.S. — leading to added health risks and higher energy costs
Is the summer heat making it hard to sleep? Here’s how the summer minimum temperatures have been changing in your city.
Hotter summers often lead to more stagnant air—trapping air pollutants that can cause health problems.
Since NOAA’s Index began in 1973, the number of annual stagnant days has increased in 83% of the contiguous U.S. cities analyzed.
While U.S. temperatures have been relatively mild this year, the rest of the world has endured near-record heat.