Climate changes directly related to increasing mean and extreme temperature, including reduced snowpack, sea and lake ice and glacier extent, and marine heatwaves , can be attributed to human activity and are affecting most of North America . Upward trends in annual mean temperature across North America since 1960 are widespread  but non-uniform . Pronounced polar amplification of warming is observed in high latitudes , particularly in winter . As average temperature rises, extreme high temperature records across North America are being set more frequently than extreme cold records  and the probability of cold extreme events is reduced ). Trends in daily maximum and minimum temperature are significant in high latitudes . Summer daily maximum temperature is increasing in southwest desert regions  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report