In June, Sammamish typically sees daytime highs of 20.6°C and overnight lows around 10.4°C. Compared to the annual average high of 15.1°C, June runs +5.5°C.
June in Sammamish averages a daytime high of 20.6°C and an overnight low of 10.4°C.
June runs +5.5°C compared to Sammamish's annual average high of 15.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 20.6°C and cooler evenings around 10.4°C.