World's average surface air temperature is about 14°C. Thermometers are placed 1.25-2m above ground in Stevenson screens. Temperature is measured using discrete readings or daily minimum/maximum averages
Egypt has a hot desert climate (Köppen BWh). Northern Mediterranean coast receives winter rainfall. Average temperatures range from 15°C in winter to 46°C in summer
Japan's climate varies from humid subtropical in north to tropical rainforest in south. Country spans latitude range from 24°N to 46°N. Tokyo lies between 35°N and 36°N
Antarctica has the coldest climate on Earth with average annual precipitation of 166 mm. The highest recorded temperature was 19.8°C at Signy Island in 1982. The lowest temperature recorded was −89.2°C at Vostok Station in 1983. Coastal areas are warmer, with average temperatures around −10°C
Delta T (ΔT) represents temperature change between initial and final temperatures. Calculation uses formula: ΔT = T2 - T1. Temperature units must be consistent (Celsius, Fahrenheit, Kelvin)
Sunny/clear weather occurs above 85,340 meters altitude. Sunny days are brought by anticyclones and cause temperature variations. Clear skies at night significantly lower temperatures