Portland surpasses coldest average high temp of the year

PORTLAND, Ore. (KOIN) -- Warmer average daytime highs continue to build in Portland from January 7 to July 24. The coldest average daytime high temperature for Portland is 46 degrees. The coldest average high started December 17, 2025 and goes through January 7. From that point on, average high temperatures begin to build towards the [...]