385 US counties' summers are already +1.5C warmer

The change in June to August's average temperature from 1895 to 2023

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Guardian graphic. Source: Analysis of Noaa temperature data by Brian Brettschneider. Note: The temperature change is calculated using the start and endpoints on the trend line of June to August's average annual temperatures from 1895 to 2023. Temperatures for this time range not available for Hawaii.