In January, Portland typically sees daytime highs of 6.6°C and overnight lows around 0.4°C. Compared to the annual average high of 16.7°C, January runs -10.0°C.
January in Portland averages a daytime high of 6.6°C and an overnight low of 0.4°C.
January runs -10.0°C compared to Portland's annual average high of 16.7°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 6.6°C and cooler evenings around 0.4°C.