Bar graph showing date (Jan.-Dec.) on the x-axis vs. temperature-humidity index on the y-axis. For most of the summer, THI was above the livestock heat stress threshold.

Figure 1. Daily temperature-humidity index (THI) in North Carolina for 2023, with a red line indicating the heat stress threshold of 72. Days with THI above 72 may cause heat stress in livestock.

Bar graph showing date (Jan.-Dec.) on the x-axis vs. temperature-humidity index on the y-axis. For most of the summer, THI was above the livestock heat stress threshold.

Source: www.visualcrossing.com