Line graph time series of global land mean surface temperature anomalies for each June-August period from 1850 through 2026. There is a long-term increasing trend and large year-to-year variability. The mean surface temperature anomaly averaged for June-August 2026 was 1.21°C for global land areas. Anomalies are computed relative to a 1901-2000 climate baseline. Data from NOAA/NESDIS/NCEI NOAAGlobalTemp v6.1.0.