In September, Newton typically sees daytime highs of 22.8°C and overnight lows around 11.1°C. Compared to the annual average high of 15.0°C, September runs +7.8°C.
September in Newton averages a daytime high of 22.8°C and an overnight low of 11.1°C.
September runs +7.8°C compared to Newton's annual average high of 15.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.8°C and cooler evenings around 11.1°C.