No, it wasn't your imagination. 2019 was a historically warm year. During the summer, dozens of cities in the US sweltered under record-high temperatures and waited out historically long hot streaks.
원문출처 : https://www.cnn.com/2019/12/17/weather/weather-warmest-months-2019-records-historical-trnd/index.html
원문출처 : https://www.cnn.com/2019/12/17/weather/weather-warmest-months-2019-records-historical-trnd/index.html