Reddit user Climatologist49 offered this map in 2015: By starting in Brownsville, Texas, on New Year’s Day and arriving at each waypoint on the day indicated, a heat-sensitive tourist could travel 9,125 miles (14,685 km) through the contiguous United States while experiencing a constant normal daytime high temperature of 70°F (21°C). They’d arrive in San Diego on New Year’s Eve. I wonder how much these temperatures have changed in eight years.