This analysis identifies Hot Days as those whose daily maximum temperature is larger than 86°F; Warm Days (summer days in the literature) as those whose daily maximum temperature is larger than 80°F; and Warm Nights (tropical nights in the literature) as those whose daily minimum temperature is larger than 68°F. If these days/nights occur for two or more consecutive days they define a Heat Wave, a Warm Day Spell, and a Warm Night Spell, respectively. Summary tables can be seen in the following links for Hot Days, Warm Days, and Warm Nights.
NOTE: The plots are created from preliminary NCEI's nClimDiv-Daily data set, v1.0.0. Data labeled as scaled on November 11, 2024.
The orange line in each panel marks the extreme temperature threshold of 86°F, 80° & 68°F.