In July, Sammamish typically sees daytime highs of 23.8°C and overnight lows around 11.9°C. Compared to the annual average high of 15.1°C, July runs +8.7°C.
July in Sammamish averages a daytime high of 23.8°C and an overnight low of 11.9°C.
July runs +8.7°C compared to Sammamish's annual average high of 15.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 23.8°C and cooler evenings around 11.9°C.