Fig. 5: Daily WBGT variation by location and time of day.

This multipanel plot shows the mean WBGT (lines) in degrees Celsius (°C) and its daily range (shaded areas) for outdoor (dark blue) and indoor (pink) settings, separated into daytime (a) and nighttime (b) panels. WBGT wet-bulb globe temperature. The daily (aggregating day and night) WBGT for the whole period of recording was significantly greater indoors than outdoors (20.5 °C vs. 19.3 °C, p < 0.05).