Charts: Decadal US Summer Temperature Anomalies
Percent area covered by temperature anomalies in categories defined as hot (>0.43σ), very hot (>2σ), and extremely hot (>3σ). Anomalies are relative to 1951–1980 base period; σ is from 1951–1980 data.
June–July–August and December–January–February temperature anomalies (°C) relative to 1951–1980 base period for areas shown on the right. Number above each map is the colored region’s percent of global area.