In June, Seattle typically sees daytime highs of 20.6°C and overnight lows around 10.7°C. Compared to the annual average high of 15.2°C, June runs +5.4°C.
June in Seattle averages a daytime high of 20.6°C and an overnight low of 10.7°C.
June runs +5.4°C compared to Seattle's annual average high of 15.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 20.6°C and cooler evenings around 10.7°C.