In April, Portsmouth typically sees daytime highs of 12.2°C and overnight lows around 4.5°C. Compared to the annual average high of 13.2°C, April runs -1.1°C.
April in Portsmouth averages a daytime high of 12.2°C and an overnight low of 4.5°C.
April runs -1.1°C compared to Portsmouth's annual average high of 13.2°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 12.2°C and cooler evenings around 4.5°C.