What Is Average Temperature?

Average (mean) temperature = sum of daily mean temperatures over a period ÷ number of days. Daily mean = (max + min) / 2. Used to characterize climate (monthly, annual), compare locations, detect trends (warming), and guide agriculture/energy planning. Global surface average ≈ 15 °C (59 °F). New York City: Jan 0 °C (32 °F), Jul 24 °C (75 °F).