In September, Santa Cruz typically sees daytime highs of 21.6°C and overnight lows around 12.2°C. Compared to the annual average high of 18.1°C, September runs +3.6°C.
September in Santa Cruz averages a daytime high of 21.6°C and an overnight low of 12.2°C.
September runs +3.6°C compared to Santa Cruz's annual average high of 18.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 21.6°C and cooler evenings around 12.2°C.