In October, Castlereagh typically sees daytime highs of 12.8°C and overnight lows around 7.7°C. Compared to the annual average high of 12.0°C, October runs +0.8°C.
October in Castlereagh averages a daytime high of 12.8°C and an overnight low of 7.7°C.
October runs +0.8°C compared to Castlereagh's annual average high of 12.0°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 12.8°C and cooler evenings around 7.7°C.