In January, Portland typically sees daytime highs of -1.0°C and overnight lows around -10.1°C. Compared to the annual average high of 12.6°C, January runs -13.6°C.
January in Portland averages a daytime high of -1.0°C and an overnight low of -10.1°C.
January runs -13.6°C compared to Portland's annual average high of 12.6°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -1.0°C and cooler evenings around -10.1°C.