In June, Castlereagh typically sees daytime highs of 16.8°C and overnight lows around 9.7°C. Compared to the annual average high of 12.0°C, June runs +4.9°C.
June in Castlereagh averages a daytime high of 16.8°C and an overnight low of 9.7°C.
June runs +4.9°C compared to Castlereagh's annual average high of 12.0°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 16.8°C and cooler evenings around 9.7°C.