(map) Surface temperatures in April 2023 compared to the 1991–2020 average. Places that were warmer than average are colored red; places that were cooler than average are blue. (graph) April temperatures each year compared to the 20^th-century average, which is the zero line. Aprils have grown warmer at an average rate of 1.44˚ Fahrenheit (0.8 ˚Celsius) per century since 1880. Climate.gov map and graph, based on data from NCEI.