In September, Tallaght typically sees daytime highs of 16.6°C and overnight lows around 9.4°C. Compared to the annual average high of 12.7°C, September runs +4.0°C.
September in Tallaght averages a daytime high of 16.6°C and an overnight low of 9.4°C.
September runs +4.0°C compared to Tallaght's annual average high of 12.7°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 16.6°C and cooler evenings around 9.4°C.