In September, Lynn typically sees daytime highs of 22.1°C and overnight lows around 11.9°C. Compared to the annual average high of 14.6°C, September runs +7.5°C.
September in Lynn averages a daytime high of 22.1°C and an overnight low of 11.9°C.
September runs +7.5°C compared to Lynn's annual average high of 14.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.1°C and cooler evenings around 11.9°C.