In September, Everett typically sees daytime highs of 20.4°C and overnight lows around 9.6°C. Compared to the annual average high of 15.0°C, September runs +5.4°C.
September in Everett averages a daytime high of 20.4°C and an overnight low of 9.6°C.
September runs +5.4°C compared to Everett's annual average high of 15.0°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 20.4°C and cooler evenings around 9.6°C.