In September, Rochester typically sees daytime highs of 22.5°C and overnight lows around 11.3°C. Compared to the annual average high of 13.8°C, September runs +8.8°C.
September in Rochester averages a daytime high of 22.5°C and an overnight low of 11.3°C.
September runs +8.8°C compared to Rochester's annual average high of 13.8°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.5°C and cooler evenings around 11.3°C.