In August, Castlereagh typically sees daytime highs of 17.7°C and overnight lows around 11.3°C. Compared to the annual average high of 12.0°C, August runs +5.7°C.
August in Castlereagh averages a daytime high of 17.7°C and an overnight low of 11.3°C.
August runs +5.7°C compared to Castlereagh's annual average high of 12.0°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 17.7°C and cooler evenings around 11.3°C.