In September, Yakima typically sees daytime highs of 24.4°C and overnight lows around 7.9°C. Compared to the annual average high of 16.2°C, September runs +8.2°C.
September in Yakima averages a daytime high of 24.4°C and an overnight low of 7.9°C.
September runs +8.2°C compared to Yakima's annual average high of 16.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 24.4°C and cooler evenings around 7.9°C.