In April, Castlereagh typically sees daytime highs of 11.2°C and overnight lows around 4.4°C. Compared to the annual average high of 12.0°C, April runs -0.8°C.
April in Castlereagh averages a daytime high of 11.2°C and an overnight low of 4.4°C.
April runs -0.8°C compared to Castlereagh's annual average high of 12.0°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 11.2°C and cooler evenings around 4.4°C.