In January, Portsmouth Heights typically sees daytime highs of 9.4°C and overnight lows around -0.8°C. Compared to the annual average high of 20.6°C, January runs -11.2°C.
January in Portsmouth Heights averages a daytime high of 9.4°C and an overnight low of -0.8°C.
January runs -11.2°C compared to Portsmouth Heights's annual average high of 20.6°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 9.4°C and cooler evenings around -0.8°C.