The formula used to calculate the Black Globe Temperature (BGT) from the Bureau of Meteorology automatic weather stations (AWS) is:

BGT = 1.33 x Temp – 2.65 x √Temp + 3.21 x log (Solrad + 1) + 3.5

Where

  • BGT = Black Globe Temperature (°C)
  • Temp = temperature (°C)
  • Solrad = solar radiation (W/m²)