In April, Seattle typically sees daytime highs of 14.3°C and overnight lows around 5.3°C. Compared to the annual average high of 15.2°C, April runs -0.8°C.
April in Seattle averages a daytime high of 14.3°C and an overnight low of 5.3°C.
April runs -0.8°C compared to Seattle's annual average high of 15.2°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 14.3°C and cooler evenings around 5.3°C.