This analysis identifies the climatology of extreme events in temperature and precipitation and growing degree days from daily area-averaged temperatures and precipitation from the NCEI's nClimDiv-Daily data set, v1.0.0. The analysis is done at statewide, climate division and county levels for 1) Hot Days as those whose daily maximum temperature is larger than 86°F; 2) Warm Days (summer days in the literature) as those whose daily maximum temperature is larger than 80°F; 3) Warm Nights (tropical nights in the literature) as those whose daily minimum temperature is larger than 68°F; 4) Freezing Days as those whose daily minimum temperature is qual to or smaller than 32°F; 5) Dry Spells as those whose daily accumulated precipitation is equal or lower than 0.04 inches for at least two consecutuve days; 6) Extreme Precipitation as those whose daily accumulated precipitation is equal or larger than the 95 percentily of daily precipitation in the period 1951-2000, and 7) Accumulated Growing Degree Days. If the days/nights occur for two or more consecutive days they define a Heat Wave, a Warm Day Spell, a Warm Night Spell, a Freezing Spell.
Summary tables are linked below for two periods, the current 1991-2020 climate normal, and the 1951-2000 20th Century climatology.