In September, Barnsley typically sees daytime highs of 17.1°C and overnight lows around 9.8°C. Compared to the annual average high of 12.5°C, September runs +4.6°C.
September in Barnsley averages a daytime high of 17.1°C and an overnight low of 9.8°C.
September runs +4.6°C compared to Barnsley's annual average high of 12.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 17.1°C and cooler evenings around 9.8°C.