Worst case sunrise times in the USA

Inspired by Dr. Drang&rsquo;s plots illustrating the potential effects in Chicago of a move to permanent Daylight Saving Time in the US, I wanted to investigate which places would have the hardest time in the dead of winter. I ended up with this map of the USA Lower 48, with regions shaded by the latest sunrise time that occurred between January 1 and January 15, 2026. If any location were to…